
MODCELL Multiloop Processor
COMMUNICATIONS CONNECTIONS
Figure 4-5. Simplified Diagram, 2034N RS-485, 4-Wire Module
2034N RS-485 MODULE
DATA
PLCC
SEL
CLK
GND
+5V dc
75LBC176D
3
6
4
7
5
1
2
10
12
11
Xmit Enab
XMIT
RCV
Note:
Flat edge of switch points to address
setting (Modbus Address 5 is shown).
Address Sw
Note:
Module occupies two slots.
75LBC176D
13
14
COMM
DEFAULTS
NO
560
Ohm
TERM
Switch
NO
RX-
RX+
TX-
TX+
Isolated
Common
Isolated
+5V dc
Isolated +5V dc
Isolated
+5V dc
56
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