Table 7, Installation – Hach-Lange SC 1000 User Manual
Page 36
34
Installation
After installation and connection of a plug-in expansion card, the card must be configured
to the system. For Modbus card setup instructions, refer to
.
)
Figure 24 Modbus RS485 (YAB021) card connections
1
Card (Reverse side)
3
Jumper 1&2 unplugged for full duplex (4-wire)
2
Jumper 1&2 plugged for half duplex (2-wire)
4
Terminal block (Refer to
for terminal
assignments)
Table 7 Modbus RS485 card (YAB021) terminal assignments
Terminal
Modbus RS485 designation with 4 wires
Modbus RS485 designation with 2 wires
1
Not Used
Not Used
2
Not Used
Not Used
3
Output –
–
4
Output +
+
5
Input –
–
6
Input +
+
7
Shield (connected to Protective Earth)
Shield (connected to Protective Earth)
Figure 25 Modbus RS232 (YAB047) card connections
1
Terminal Block (Refer to
Table 8
for terminal assignments)