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MM232/485CONV

ISOLATED RS232/RS485 CONVERTER

The RS232 / RS485 Isolated converter module is used to convert RS232 data communications signals for transmission over 2 or 4 wire RS485(RS422) twisted pair cables. The RS232 RTS connection can be used to turn the transmitter on when transmitting in 2 wire mode (half duplex) or it can be permanently enabled, for an easy to use, one-to-one communications link in 4 wire mode (full duplex). The converters can be used to extend the limited distance capabilities of RS232 devices such as printers and terminals for up to one kilometre.

Standard features of the converter are :
2 or 4 Wire Operation.

Internal jumpers are used to select 2 wire (RS485) or 4 wire (RS422) modes.

 
RTS Flow control.

The RS232 RTS signal can be used to switch the transmitter on and off when multiple converters are connected to the same cable. For 4 wire point to point operation the RTS signal is not required and the RS485 Tx and Rx can be permanently enabled.

 
Signal Isolation.

The converter module isolates the RS232 and RS485 signals to prevent ground loops between remote devices.

 
DIN Rail Mount.

The converter module plugs directly into a 11PIN industry standard relay base which may be DIN rail mounted or flush mounted.

 

 

SPECIFICATIONS

Power Supply: 200 - 260VAC @ 1.5VA

Transmission Meduim: 2 OR 4 Wire twisted pair cable.

Transmission Distance: Up to 1 Km.

Indicator: LED indicator shows power state.

Isolation: Transformer/OptoCoupler - 1500VACrms

Operating Temperature: -20°C to + 80°C.

Connector: 11 Pin Connector on rear of unit.

WIRING

 

 

 

JUMPER SETTINGS

 

 

RECOMMENDED SETTINGS:

                2 WIRE (FACTORY DEFAULT):                     4 WIRE:

                        L1         2-3 & 4-5                             L1         1-2 & 5-6

                    L2&L3             1-2                             L2&L3     NO CONNECTION

***NOTE: 120ohm termination resistors must be placed at the ends of the twisted pair cables for correct operation.

Order Codes: MM232/485CONV

 

 

 

 

 

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