B&B Electronics GW-7552 - Manual User Manual

Page 10

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 10

Table 5 Jumper position for the RS-422 port

Pull high/low resistor

Condition

Enabled

(default)

− The GW-7552 is the master in RS-

422 bus or

− the number of devices connected to

the RS-422 bus is less than 10

Disabled

− The GW-7552 is a slave in RS-422

bus or

− the number of devices connected to

the RS-422 bus exceeds 10

Figure 6 Configuration of pull high/low resistor for the RS-422 port