Connection Of Jumpers; Technical Specification Of Rs232 And Rs485 - Advantech SmartFlex SR303 User Manual

Technical specification of RS232 and RS485 bus:
RS232 and RS485 interface
Max. operating RS232 bus current
Max. number of devices on RS485 bus
Max. output current on RS485 bus
Max. data rate
Max. total cable length (300 Bd, 200 nF/km)
Table 24: Technical specification of RS232 and RS485
The termination resistor can be activated directly on the port board using a jumper (termination
resistor is part of the port board).
Figure 45: Connection of jumpers
37
SmartFlex SR303
15 mA
32
60 mA
230400 bps on RS232
230400 bps on RS485
RS232 20 m, RS485 1200 m