Read PSM-ME-RS232/RS485_REV1 text version

PSM-ME-RS232/RS485-P

Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

1. Short Description

The PSM-ME-RS232/RS485-P rail-mountable and compact interface converters have been designed especially for industrial use in the switch cabinet or switch box. They convert the RS-232 interface signals bidirectionally to the RS-485 2-/4-wire and RS-422 standard. The devices are simply snapped onto standard EN mounting rails and supplied with 24 V DC or AC. Their particular feature is the multifunctional application: ­ RS-232 master interface in RS-485 bus systems ­ Networking RS-232 equipment ­ RS-232 range increase to 1000 m as interferencefree and fast point-to-point connection ­ RS-232 interface adaptation to RS-422 and RS-485 systems The following features of the interface converter are particularly outstanding: ­ 3 operating modi can be configured - RS-232 RS-485-2-wire - RS-232 RS-485-4-wire - RS-232 RS-422 ­ Can be used universally in all common bus systems with UART/NRZ data format and 10/11 bits character length ­ Transmission rate can be set between 4.8 kbit/s and 115.2 Mbit/s ­ Automatic transmit/receive changeover ­ High-quality 3-way isolation (VCC // RS-232 // RS-485) ­ Integrated surge voltage protection with transient discharge to the mounting rail ­ Supply voltage of 24 V DC or AC to suit the switch cabinet ­ Minimal current consumption/power dissipation

If you have any technical questions, please contact us at: PSM-HOTLINE:+49/(0)52 35/3-19890 FAX:+49/(0)52 35/3-19899 e-mail: [email protected]

Headquarters: © Phoenix Contact GmbH & Co. KG · Flachsmarktstraße 8 · 32825 Blomberg · Germany Phone +49-(0) 52 35-3-00 · Fax +49-(0) 52 35-3-4 12 00 · http://www.phoenixcontact.com

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

1.1. Sample applications 1.1.1. RS-232 // RS-485 interface converter The RS-485 standard is specified for applications with multipoint connections. We distinguish between 2-wire bus systems with half-duplex transmission and 4-wire bus systems with full-duplex transmission: ­ RS-232 master adaptation (fig. 2a) ­ Programming /and parameterizing connection (fig. 2a) ­ Networking RS-232 stations (the software must guarantee that the stations can be addressed; (fig. 2b)

RS-232

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1 6 2 7 3

RS-485

D(A) D(B) T(A) T(B) GND 6

8 4 9 5

RS232

RS485

Fig. 2a

RS-232

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

RS-485

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

RS-232

1

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

6 2 7 3 8 4 9 5

RS232

RS232

RS485

RS485

D(A) D(B) T(A) T(B) GND 6

Fig. 2b

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1 6 2 7 3 8 4 9 5

RS232

RS485

D(A) D(B) T(A) T(B) GND 6

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232

RS485

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232

RS485

max. 31 stations

Fig. 2

1.1.2. RS-232 // RS-422 interface converter The RS-422 interface is a balanced to earth interface for point-to-point connections. The logical states are represented by a differential voltage between two lines. Areas of application are: ­ Interface adaptation to RS-422 devices (fig. 3a). ­ Interference-free and fast point-to-point connection up to 1000 m (fig. 3b)

RS-232

RS-422

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232 RS485

fig. 3a

RS-232

RS-422

RS-232

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232 RS485

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232 RS485

Fig. 3b

Fig. 3

PHOENIX CONTACT page 2 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

2. Order data

Interface converter, for the conversion of RS-232 to RS-485 2-/4-wire or RS-422, with electrical 3-way isolation, rail-mountable

Type

Order No.

Pcs. Pkt.

PSM-ME-RS232/RS485-P

27 44 41 6

1

2.1. Accessories

Compact power supply, primary switchedmode, 24 V DC, 650 mA, rail-mountable RS-232 cable, 2m, to connect the PSM-ME converter to a 9-pos. device interface RS-232 cable, 2m, to connect the PSM-ME converter to a 25-pos. device interface SUB-D plug, 9-pos., with screw connection for free assembly of an RS-232 cable 230 V AC 120 V AC MCR-PS 230 AC/24 DC/650 MCR-PS 120 AC/24 DC/650 28 11 95 4 28 11 96 7 1 1

SUB-D9/SUB-D9 (socket/socket) SUB-D9/SUB-D25 (socket/socket) socket pin

PSM-KA-9SUB 9/BB/2METER

27 99 47 4

1

PSM-KA-9SUB 25/BB/2METER SUBCON 9/F-SH SUBCON 9/M-SH

27 61 06 2 27 61 49 9 27 61 50 9

1 1 1

2.2. Technical Data

Supply voltage Frequency Rated current consumption Connection LED operational availability RS-232 interface Type of transmission Coding option Data indicator Transmission rates in kbit/s Transmission length Connection RS-485/RS-422 interface Interface standards 24 V AC/DC ± 20 % DC-60 Hz typ. 85 mA pluggable COMBICON screw terminal block LED green acc. to DIN 66 259 T1, CCITT V.28 transparent to protocol DTE/DCE switchover via DIP switch LED green (RD) RS-232 receive data (dynamic) LED yellow (TD) RS-232 transmit data (dynamic) 4.8; 9.6; 19.2; 38.4; 57.6; 75; 93.75; 115.2 0...15 m shielded (recommended from 38.4 kbit/s, max. 5 m in industrial applications) 9-pos. SUB-D pin strip acc. to DIN 66 259-4 RS-485 2-wire, half duplex, RS-485 4-wire, full duplex, RS-422, full duplex, can be configured via DIP switch UART/NRZ1), 10/11 bit 11.5 bit after start bit edge corresponding to the RS-232 interface 0...1200 m, twisted pair, shielded either automatic control or control via RS-232 RTS/CTS RTS/CTS 3V, transmit in direction of RS-485 Inversion possible via DIP switch switchable, 390 pull up/down, 150 terminating resistance pluggable COMBICON screw terminal block /shield connector

Data format/coding Character length Tri-State Transmission rates in kbit/s Transmission length Data direction switching

Terminating resistances Connection

data/shield

3. General data

Protection circuit Transient discharge Electrical 3-way isolation Test voltage Resistance to vibration Ambient temperature range Protection type Housing: Y-capacitors, suppressor diodes, gas-filled surge arresters via metal foot on EN mounting rail power supply // RS-232 // RS-485/RS-422 2 kVrms, 50 Hz, 1 min. 5 g in acc. with IEC 68-2-6 0 °C to + 55 °C IP 20 PA-V0 (99 / 22.5 / 118.6) mm 0.2 - 2.5 mm2 (AWG 24-12) approx. 120 g

Material Dimensions (W / H / D) Connection data (conductor cross section) - COMBICON plug connectors Weight Approval

u

1) NRZ: Non Return To Zero PHOENIX CONTACT page 3 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

c

Complies with EMC guideline 89/336/EEC

EMC (electromagnetic compatibility) Immunity to interference in acc. with EN 50082-2 · Electrostatic discharge (ESD) EN 61000-4-2 Criterion B 8 kV discharge in air 6 kV contact discharge Criterion A 10 V/m 10 V/m Criterion B 2 kV/5 kHz 4kV/5 kHz Criterion B 2 kV/12 0.5 kV/2 Criterion A 10 V

· Electromagnetic HF field: Amplitude modulation: Pulse modulation: · Fast transients (Burst) Signal: Supply: · Surge voltage capacities (Surge) Signal: Supply: · Conducted disturbance

EN 61000-4-3

EN 61000-4-4

EN 61000-4-5

EN 61000-4-6

Noise emission in acc. with EN 50081-2 EN 55011 Class A

EN 61000 corresponds to IEC 1000 EN 55011 corresponds to CISPR11 Criterion A: Normal operating behavior within the defined limits. Criterion B: Temporary impairment of operational behavior that the device corrects itself. Class A: Area of application: industry, without special installation measures.

99

22,5

118,6

Fig. 4

PHOENIX CONTACT page 4 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

Function elements (fig. 5) 1 Supply voltage 24 V AC/DC 2 LED Supply voltage (VCC) 3 LED-RS-232 receive data (RD) 5 RS-232 interface connection 6 RS-485/RS-422 interface connection 7 Shield connector 8 Snap-on foot for mounting rails in acc. with DIN EN 50 022

G N D

6

5

S 48

Or SM d.Nr. -M :2 E 74 44 R 16 S 2

4

5P

3 2 1

4 LED-RS-232 transmit data (TD)

6

D (A ) D (B )

P

32

RS 23

/R

D( T( B) D( ND A) G

T (A ) T (B )

2 RS 48 5

A)

B) T( 6

/R 32 S2 1 6 -R 4 4 ME 4 M- : 27 PS -Nr. rt. A

DTE

S4

85

-P

Device-Typ RS232

ON DCE Terminate RS485/RS422

6 7

RTS/CTS-CONTROLLED

SPEED (kbit/s)

OFF OFF ON ON 4,8 ON OFF ON ON 9,6 OFF OFF ON ON 19,2 OFF OFF ON ON 38,4 OFF OFF OFF ON 57,6 ON ON OFF ON 75 OFF ON OFF ON 93,75 OFF ON OFF ON 115,2

OFF

1 DIP-Switch 3 2

FUNC. 5

8

RTS/CTS INVERS RS485 4-WIRE RS485 2-WIRE RS422 RS485 RTS/CTS STANDARD

ON OFF

4

SELF-CONTROLLED

7

N / NE N IO E AT ION OB AT PR OB AP PR AP

/

S AL S OV AL PR OV AP PR AP

8

Fig. 5

4. Operational Diagram

SUB - D 9 pole Steckbare Schraubklemme Screw terminal block Bloc de jonction a`vis Borne de tornillo +5V +5V 390 150 390

+5V (Port A) gn

390 150 390

24V 24V OV OV

+5V (Port B)

VCC

DCE DTE TxD RxD 3 2 7 8 5 6 O FF 4 DATA RATE Bus - Management DIP 6 O N (RTS / CTS) O FF (RTS / CTS) ye ON DIP 5 gn DIP 7

2 Wire O FF

RS - 232

RTS CTS GND DSR DTR

ON 4 Wire D(A) D(B) DIP 8 O FF (RS 485) O N (RS 422) +5V T(A) T(B)

GND

Shield

PHOENIX CONTACT page 5 of 12

RS - 485 RS - 422

2 Wire / 4 Wire

Fig. 6

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

5. Notes on connection

5.1. Connections (fig. 7) 1 Plug connector power supply Connect 24 V AC/DC ± 20 % via the COMBICON plug connector (PIN 1 and 3). Operational availability is signaled via the VCC LED 2. 3 RS-232 interface 9-pos. SUB-D pin strip 4 RS-485/RS-422 interface pluggable COMBICON screw terminal block

24 V

1

0V

2

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1 6 2

3

D(A) D(B) T(A) T(B) GND 6

7 3 8 4 9 5

RS232 RS485

4

Fig. 7

Mounting (on 35 mm mounting rails in acc. with DIN EN 50 022): Hinge the device into the upper edge of the mounting rail and snap it in with a downward motion. Note: The mounting rail must be connected to ground potential. This is the only way to guarantee that the integrated surge voltage protection functions and that the shield of the bus conductor makes contact effectively. Dismantling: Pull back the metal disassembling lever 1 with the aid of a screwdriver and remove the device from the top.

Or SM d.Nr. -M :2 E 74 44 R 16 S 2

P

32

/R

RS 23

5.2. Mounting in the switch cabinet (fig. 8)

D( T( B) D( ND A) G

RS 48 5

S

2

48

A) B) T( 6

85 -P

D (A ) D (B ) T(A ) T(B )

S4 /R 32 S2 41 6 E-R 44 M-M: 27 PS.-Nr. rt A

5DTE

P

Device-Typ RS232

ON

G N D

6

DCE

Terminate RS485/RS422

6 7

RTS/CTS-CONTROLLED

SPEED (kbit/s)

OFF OFF ON ON 4,8 ON OFF ON ON 9,6 OFF OFF ON ON 19,2 OFF OFF ON ON 38,4 OFF OFF OFF ON 57,6 ON ON OFF ON 75 OFF ON OFF ON 93,75 OFF ON OFF ON 115,2

OFF

1 DIP-Switch 3 2

FUNC. 5

S AL OV LS PR VA AP PRO / AP EN / N IO EN AT N OB TIO PR BA AP PRO AP

RTS/CTS STANDARD

8

RTS/CTS INVERS RS485 4-WIRE RS485 2-WIRE RS422 RS485

ON OFF

4

SELF-CONTROLLED

1

Fig. 8

PHOENIX CONTACT page 6 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

6. The RS-232 interface

PSM-ME-RS232... peripherals side

Designation

SUB-D 9-pos. TXD RXD CTS RTS GND DTR DSR 6

(pin) PIN 3 PIN 2 PIN 8 PIN 7 PIN 5 PIN 4 PIN 6 Shield

SUB-D 9-pos. (pin) Max. 15 m

Transmit data Receive data Clear to send Request to send Functional ground DEE data terminal ready Data set ready Ground

SUB D 25 9 3 2 8 7 4 6 5 2 3 5 4 20 6 7 TxD RxD CTS RTS DTR DSR GND

TxD RxD CTS RTS DTR DSR GND 6

3 2 8 7 4 6 5

6.1. Interface coupling Make a 1-to-1 connection between the PSM module and the peripheral device as shown in Fig. 9. Note: For a minimum configuration, you need to connect TXD, RXD and GND (software handshake)! Connect the 9-pos. SUB-D plug to the module (fig.10). 6.2. Data indicator

D( A T( B) D( ND A) G

Fig. 9

Two diagnostic LEDs indicate the RS-232 interface modes ­ Yellow: Transmit data (TD), dynamic ­ Green: Receive data (RD), dynamic

S OOrrd M d.-.-N Nr.r.: M : 227 E 7 444 -R 4 441 S 166 2

P

32

/R

RS 23 2 RS 48 5

S4 /R 32 S2 41 6 E-R 44 M-M: 27 PS.-Nr. Art

DTE Device-Typ RS232

S

) B) T( 6

85 -P

D (A ) D (B ) T (A ) T (B )

48

ON DCE

G N D

6

5Terminate RS485/RS422

6 7

RTS/CTS-CONTROLLED

P

SPEED (kbit/s)

OFF OFF ON ON 4,8 ON OFF ON ON 9,6 OFF OFF ON ON 19,2 OFF OFF ON ON 38,4 OFF OFF OFF ON 57,6 ON ON OFF ON 75 OFF ON OFF ON 93,75 OFF ON OFF ON 115,2

OFF

1 DIP-Switch 3 2

FUNC. 5

N NE N IO NE AT IO T OB A B PR O R AP P AP

8

RTS/CTS INVERS RS485 4-WIRE RS485 2-WIRE RS422 RS485 RTS/CTS STANDARD

ON OFF

4

SELF-CONTROLLED

/

/

S AL S L OV A V PR O R AP P AP

Fig. 10 6.3. Configuration For configuration, release the top of the housing on both sides 1. Pull the p.c.b. out of the housing as far as possible 2 (fig. 11). Static charges can damage electronic devices. Discharge the electrical charge from your body before opening and configuring the device. To do so, touch a grounded surface, e.g. the metal housing of the switch cabinet.

D (A )

D (B )

T( A )

T( B )

Or

d.-

PS

RS

Nr.

:2

74

44

ON Terminate RS485/RS422 OFF

FUNC. 5 6 7

RTS/CTS-CONTROLLED

2

D( A T( B) D( ND A) G )

M M-

G N D

1

6

16

RTS/CTS INVERS RS485 4-WIRE

E-R

S2

32

/R

23 2 RS 48 5

IO AT OB TIO PR BA AP PRO P

8 ON

RS422 SELF-CONTROLLED RTS/CTS STANDARD

B) T( 6

OFF

RS485 2-WIRE RS485

Fig. 11

PHOENIX CONTACT page 7 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

6.4. DTE/DCE switchover (fig. 12) DTE/DCE The DTE/DCE slide switches can be used to cross the cables TXD and RXD as well as RTS and CTS internally so that an adaptation to DTE or DCE interfaces can be performed easily. For the connection to: ­ Data terminal equipment (DTE) switch to position DTE. (Standard setting for most applications)

ON Terminate RS485/RS422

ON DTE

PSM-ME-RS232/RS485-P Art.-Nr.: 27 44 41 6

DTE Device-Typ RS232

­ Data communication equipment (DCE) switch to position DCE. If the connected interface type is unknown, you can determine the right configuration by trial and error (DTE/DCE switch).

P

SPEED (kbit/s)

ON 410 3 2 9 1 8 7 6 5 4 3 2 1

ON 10 9 8 7 6 5

ON

OFF

FUNC. 5

DCE

4,8 9,6 19,2 38,4 57,6 75 93,75 115,2

APPROBATIONEN / APPROVALS

6 7 8

RS485 4-WIRE RS485 2-WIRE RTS/CTS INVERS RS422 RS485 RTS/CTS STANDARD

RTS/CTS-CONTROLLED SELF-CONTROLLED

ON ON ON ON OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF ON ON OFF ON OFF ON ON OFF ON OFF

ON

ON OFF

1

ON OFF OFF

DIP-Switch

2 3 4

Fig. 12 6.5. CTS/RTS support (DIP switch 5) In normal operating mode, no control lines (RTS/ CTS) are required for data direction switching (switch position DIP 5 "OFF"). The data direction switching can alternatively be controlled through the RTS/CTS lines. Set the DIP switch 5 to the "ON" position.

RS - 232

DCE DTE TxD RxD RTS CTS GND DSR DTR 3 2 7 8 5 6 4 DATA RATE DIP 6

S1

Function: RTS/CTS ­3 V to ­15 V = RS-485 receive mode RTS/CTS +3 V to +15 V = RS-485 transmit mode 6.6. RTS/CTS inversion (DIP switch 6) In uncommon applications, the control lines must be inverted. Set the DIP switch 6 to the "ON" position (default: "OFF"). The signal position in inverse mode is then as follows: RTS/CTS +3 V to +15 V = RS-485 receive mode RTS/CTS -3 V to -15 V = RS-485 transmit mode

O N (RTS / CTS) O FF (RTS / CTS)

Bus - Man

Fig. 13

PHOENIX CONTACT page 8 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

7. The RS-485/RS-422 interface

7.1. Operation as RS-485 2-wire interface Pin configuration Designation COMBICON D(B) D(A) GND 6 (pin) PIN 2 PIN 1 PIN 6 PIN 8 PSM-ME-RS-485

D(A) D(B) GND 1 2 6 6

1

PSM-ME-RS-485

1 2 6 6 D(A) D(B) GND

Data line (+) Data line (­) Signal ground Ground/shielded connection Settings:

Shield

COMBICON 1) As described in the section "RS-232 interface", set the operating mode of the RS-232 interface with DIP switch 5 and 6 and the type of interface with the DTE/DCE switchover switch. Note: If automatic operating mode is selected, no control lines from the RS-232 interface are required.

PSM-ME-RS232/RS485-P Art.-Nr.: 27 44 41 6

Fig. 14

RS-485 Terminate

DTE/DCE

ON DTE

2) If the automatic operating mode was selected, set the transmission rate with the aid of DIPswitches S1-S4 (fig. 15) and the table below. All PSM converters and bus stations must be set to the same transmission rate!

P

SPEED (kbit/s)

ON 410 3 2 9 1 8 7 6 5 4 3 2 1

ON 10 9 8 7 6 5

ON

DTE

ON OFF

FUNC. 5

Terminate RS485/RS422

6 7 8

RS485 4-WIRE RS485 2RTS/CTS INVERS RS422 R RTS/CTS RTS/CTS-CONTROLLED SELF-CO

Device-Typ RS232 DCE

ON ON ON ON OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF ON ON OFF O 4,8 9,6 19,2 38,4 57,6 75 93,75 115,2 ON ON OFF

ON

1

Fig. 15

DIP-Switch

2 3

T( ) (B D GN

RS 48 5

A)

B) T( 6

The interface converters only convert an electric signal. 3) Set DIP switch 8 to position "OFF" to activate the RS-485 operating mode. 4) Set DIP switch 7 to "OFF" to activate the 2-wire mode. 5) If necessary, activate the terminating resistors fig. 15 (Please observe the section 8 on "Terminating resistor for the RS-485/RS-422 interface", page 12). 6) To couple two RS-485 interfaces, connect the connections acc. to fig. 14. (1 = twisted pair) GND connection is recommended, but is not essential. Shielding the data cables The data cables are shielded using a shield terminal block that is fixed in the 6 terminal block (fig. 16). The 6 terminal block is connected capacitively to the mounting rail contact on the underside of the device. The shield connector is included in the scope of delivery. Use shielded twisted pair cables. Connect the cable shield to both sides of the transmission path!

D (A )

D (B )

T (A )

T (B )

ON

G N D

6

Terminate RS485/RS422

6 7

RTS/CTS-C

OFF

115,2

FUNC. 5

8

RTS/CT RS48

OFF ON

Fig. 16

SPEED (kbit/s) 4,8 9.6 19.2 38.4 57.6 75 93.75 115.2 FUNC. DIP 5 6 7 8 DIP 1 ON ON ON ON ON OFF OFF OFF 2 ON OFF OFF OFF OFF ON ON ON 3 OFF ON ON OFF OFF ON ON OFF 4 OFF ON OFF ON OFF ON OFF ON

ON RTS/CTS-CONTROLLED RTS/CTS INVERS RS485 4-WIRE RS422

OFF SELF-CONTROLLED RTS/CTS STANDARD RS485 2-WIRE RS485

PHOENIX CONTACT page 9 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

7.2. Operation as RS-485 4-wire interface Pin configuration Designation COMBICON D(B) D(A) T(B) T(A) GND 6 (pin) PIN 2 PIN 1 PIN 4 PIN 3 PIN 6 PIN 8

PSM-ME-RS-485

D(B) D(A) T(B) T(A) GND 2 1 4 3 6 6

1

PSM-ME-RS-485

2 1 4 3 6 6 D(B) D(A) T(B) T(A) GND

Receive data (+) Receive data (­) Transmit data (+) Transmit data (­) Signal ground Ground/shielded connection Settings:

Shield

COMBICON

Fig. 17 RS-485 Terminate DTE/DCE

1) Set as described in the section "RS-232 interface" the operating mode of the RS-232 interface using DIP switch 5 and 6 and the type of interface with the DTE/DCE switchover switch. Note: If automatic operating mode is selected, no control lines from the RS-232 interface are required. 2) If the automatic operating mode was selected, set the transmission rate with the aid of DIP-switches S1-S4 (fig. 18) and the table below. All PSM converters and bus stations must be set to the same transmission rate! The interface converters only convert an electric signal. 3) Set DIP switch 8 to position "OFF" to activate the RS-485 operating mode. 4) Set DIP switch 7 to "ON" to activate the 4-wire mode. 5) If necessary, activate the terminating resistors fig.18 (Please observe the section 8 on "Terminating resistor for the RS-485/RS-422 interface", page 12). 6) To couple two RS-48 interfaces, connect the connections acc. to fig. 17. (1 = twisted pair) When connecting the device, take into account that it is necessary to cross transmitted and received data. GND connection is recommended, but is not essential. Shielding the data cables The data cables are shielded using a shield terminal block that is fixed in the 6 terminal block (fig. 19). The 6 terminal block is connected capacitively to the mounting rail contact on the underside of the device. The shield connector is included in the scope of delivery. Use shielded twisted pair cables. Connect the cable shield to both sides of the transmission path!

ON DTE

PSM-ME-RS232/RS485-P Art.-Nr.: 27 44 41 6

DTE ON OFF

FUNC. 5

P

SPEED (kbit/s)

ON 410 3 2 9 1 8 7 6 5 4 3 2 1

ON 10 9 8 7 6 5

ON

Terminate RS485/RS422

6 7 8

RS485 4-WIRE RS485 2RTS/CTS INVERS RS422 R RTS/CTS RTS/CTS-CONTROLLED SELF-CO

Device-Typ RS232 DCE

ON ON ON ON OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF ON ON OFF O 4,8 9,6 19,2 38,4 57,6 75 93,75 115,2 ON ON OFF

ON

G N D

6

1

Fig. 18

DIP-Switch

2 3

5

)

B) T( 6

D (A )

D (B )

T (A )

T (B )

P A

ON Terminate RS485/RS422

6 7

RTS/CTS-CONTR

OFF

93,75 115,2

FUNC. 5

8

RTS/CTS INVE RS485 4-WIR RS

OFF ON ON

Fig. 19

SPEED (kbit/s) 4,8 9.6 19.2 38.4 57.6 75 93.75 115.2 FUNC. DIP 5 6 7 8 DIP 1 ON ON ON ON ON OFF OFF OFF 2 ON OFF OFF OFF OFF ON ON ON 3 OFF ON ON OFF OFF ON ON OFF 4 OFF ON OFF ON OFF ON OFF ON

ON RTS/CTS-CONTROLLED RTS/CTS INVERSE RS485 4-WIRE RS422

OFF SELF-CONTROLLED RTS/CTS STANDARD RS485 2-WIRE RS485

PHOENIX CONTACT page 10 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

7.3. Operation as RS 422 interface Pin configuration Designation COMBICON D(B) D(A) T(B) T(A) GND 6 (pin)

PSM-ME-RS-422

1

PSM-ME-RS-422

2 1 4 3 6 6 D(B) D(A) T(B) T(A) GND

Receive data (+) Receive data (­) Transmit data (+) Transmit data (­) Signal ground Ground/shielded connection Settings:

PIN 2 PIN 1 PIN 4 PIN 3 PIN 6 PIN 8

D(B) D(A) T(B) T(A) GND

2 1 4 3 6 6

Shield

COMBICON

1) Set the DIP switch 8 to position. "ON" to activate the RS-422 operating mode (fig. 21). 2) Set as described in the section "RS-232 interface" the interface type of the RS-232 interface with the DTE/DCE switchover switch. Note: In this operating mode, no control lines from the RS-232 interface are required and none are transmitted. 3) Switch the line terminating resistor on both sides of the RS422 transmission link on. © Put "Terminate" slide switch to "ON". 4) To couple two RS-422 interfaces, connect the connections acc. to fig. 20. (1 = twisted pair) When connecting the device, take into account that it is necessary to cross transmitted and received data. GND connection is recommended, but is not essential. RS-422 Terminate "ON" DTE/DCE Fig. 20

ON DTE

PSM-ME-RS232/RS485-P Art.-Nr.: 27 44 41 6

DTE ON OFF

FUNC. 5

P

SPEED (kbit/s)

ON 410 3 2 9 1 8 7 6 5 4 3 2 1

ON 10 9 8 7 6 5

DIP 8

ON

Terminate RS485/RS422

6 7 8

RS485 4-WIRE RS485 2-WIRE RTS/CTS INVERS RS422 RS485 RTS/CTS STANDARD RTS/CTS-CONTROLLED SELF-CONTROLLED

Device-Typ RS232 DCE

ON ON ON ON OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF ON ON OFF OFF ON OFF ON ON OFF ON OFF 4,8 9,6 19,2 38,4 57,6 75 93,75 115,2 ON ON OFF OFF

APPROBATIONEN / APPROVALS

ON

1 DIP-Switch 2 3 4

Fig. 21

Shielding the data cables The data cables are shielded using a shield terminal block that is fixed in the 6 terminal block (fig. 22). The 6 terminal block is connected capacitively to the mounting rail contact on the underside of the device. The shield connector is included in the scope of delivery.

RS 23

D( A T( B) D( ND A) G

RS

2 48 5

)

B) T( 6

D (A )

D (B )

T (A )

T (B )

M MPS.-N t Ar

ON

G N D

6

Terminate RS485/RS422

OFF

57,6 75 93,75 115,2

Use shielded twisted pair cables. Connect the cable shield to both sides of the transmission path!

FUNC. 5 6 7

RTS/CTS-CONTROLLED

OFF OFF OFF ON ON ON OFF ON OFF ON OFF ON OFF ON OFF ON

8

RTS/CTS INVERS RS485 4-WIRE RS485 2-WIRE RS422 RS485 RTS/CTS STANDARD

ON OFF

/ EN / ON EN TI N BA TIO O A

SELF-CONTROLLED

A

Fig. 22

PHOENIX CONTACT page 11 of 12

PSM-ME-RS232/RS485-P Interface converter for RS-232 to RS-485 2-/4-wire or RS-422

8. Set the line terminating resistor correctly in RS-485 and RS-422 mode.

A connectable line terminating resistor is integrated in the converter and it must be switched on or off, depending on the application. 8.1. In RS-485 mode (2/4-wire)

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1 6 2 7 3 8

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

1

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

6 2 7 3 8 4 9 5

RS232

RS232

RS485

RS485

D(A) D(B) T(A) T(B) GND 6

RS-485 is the standard for a multi-point-capable connection (up to 32 terminals). The RS-485 bus line may only be terminated at the two most distant bus ends. © "Terminate" slide switch to "ON" at the beginning and end of the bus line (fig. 23).

4

D(A) D(B) T(A) T(B) GND 6

= Bus terminating resistor "ON" 8.2. In RS-422 mode RS-422 is the standard for a point-to-point connection between two devices. The line terminating resistor on both sides of the RS-422 transmission link must be switched on. © "Terminate" slide switch always in "ON" position (fig. 24).

9 5

RS232

RS485

Fig. 23

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

PSM­ME­RS232/RS485­P Ord.-No.: 27 44416

1

1

D(A) D(B) T(A) T(B) GND 6

= Terminating resistor "ON"

RS 485/RS 422 Terminate

ON DTE

ON DTE

PSM-ME-RS232/RS485-P Art.-Nr.: 27 44 41 6

DTE ON

PHOENIX CONTACT page 12 of 12

© PHOENIX CONTACT

30.07.99

Fig. 25

TNR: 5104422-01

ON 10 9 8 7 6 5 4 3 2 1

http://www.phoenixcontact.com

6 2 7 3 8 4 9 5

RS232 RS485

D(A) D(B) T(A) T(B) GND 6

6 2 7 3 8 4 9 5

RS232 RS485

Fig. 24

Terminate RS485/RS422

Device-Typ RS232

OFF

FU

DCE

S

Information

PSM-ME-RS232/RS485_REV1

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