Rs485 Connector; Rs232 Connector; Connections Of Terminal Block Connector Rs485; Connections Of Terminal Block Connector Rs232 - Advantech SmartFlex SR304 User Manual

When connecting counterpart terminal block connectors (included in package with the router),
use cables with nominal cross section 0.2 to 1.0 square mm (30 to 16 AWG). Recommended
stripping length is 5 mm. For M2 captive screws the screw driver 0.5 x 3 mm is recommended.
Tighten the screws with 0.3 Nm torque.
Connection of RS485 connector:
Pin Signal
1 GND
2 TxRx+
3 TxRx-
Table 26: Connections of Terminal Block Connector RS485
Signal ground is isolated from the router's ground.
The termination resistor can be activated directly on the port board using a jumper (termination
resistor is part of the port board).
Connection of RS232 connector:
Pin Signal
1 AUX
2 GND
3 RXD
4 TXD
Table 27: Connections of Terminal Block Connector RS232
Common with router's signal ground.
Description
Signal ground
RS485 B(+)
RS485 A(-)
Figure 47: RS485 connector
Description
+5 V/500 mA
Signal ground
Receive Data
Transmit Data
Figure 48: RS232 connector
36
SmartFlex SR304
Direction
—
Input/Output
Input/Output
Direction
—
—
Input
Output