Rs232 Interface; Connecting The Connectors; Maximum Line Lengths - insys icom SCR Series Installation And User Manual

SCR
8.5

RS232 interface

Figure 8: SCR – RS232 interface connection
Connector Signal
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Table 10: SCR – RS232 interface connection

The RS232 interface conforms to the layout as DTE (Data Terminal
Equipment)
8.6

Connecting the connectors

The wires are contacted in the connector via screw terminals. The tightening
torque is 0.5 – 0.6 Nm.
The permissible wire cross-sections can be found in the following table.
Wire
Nominal cross-section
Rigid
Flexible
Flexible with end sleeve
Table 11: Permissible wire cross-sections for connectors
8.7

Maximum line lengths

The maximum line lengths to the connections can be found in the following table.
Wire
Antennas, power supply, serial interfaces, inputs and outputs,
other signals
Table 12: Permissible line lengths
Description
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Ground
Data Set Ready
Request To Send
Clear To Send
Ring Indication
Technical Information
Cross-section
1.5 mm²
0.2 – 1.5 mm²
0.2 – 1.5 mm²
0.25 – 1.5 mm²
Max. length
30 m
29