User's Manual

3.2.2.1. Control Connector (RS485 / RS232) for Extension Unit
This 8-pin male connector (type: Binder Series 712) primarily supports control of the
Extension Unit via RS485 bus.
PIN Assignment
1 not connected
2 RS232 Rx
3 RS232 Tx
4 not connected
5 GND (RS232)
6 RS485 R+/D+
7 RS485 GND
8 RS485 R-/D-
figure 3-6 RS485 connector table 3-1 RS485 connector, PIN assignment
3.2.3. Grounding
Grounding must be carried out. Connect an earth-bondin
g cable to the grounding
connection provided at the outside of the Remote Unit (see chapter 3.2.2
Connections). Do not use the grounding connection to connect external devices.
figure 3-7 Grounding bolt with
loosened hex nut
figure 3-8 Grounding bolt, schematic view
After loosening the hex nut, connect the earth-bonding cable between the two
washers as illustrated in the figures above. Then, fasten all parts again with the hex
nut.
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