
MODCELL Multiloop Processor
COMMUNICATIONS CONNECTIONS
Figure 4-2. Typical Modbus Network Connections for 2033N RS-232 Communication Module
Isolated
Common
COM
RX
TX
DX
(Not Used)
RX
TX
S32
BASE INSTRUMENTLOWER
TERMINAL
HOUSING
2033N RS-232 MODULE
(Module Location 31-32)
DATA
PLCC
SEL
CLK
GND
+5V dc
MAX202
3
6
4
7
5
1
2
A
B
2
1
S31
13
142
1
12
11
10
XMIT
RCV
DCD
COM
Note:
Flat edge of switch points to address
setting (Modbus Address 5 is shown).
Address Sw
Note:
Module occupies two slots.
Personal Computer
or
2033N Module
MODBUS MASTER
COMM
DEFAULTS
NO
Modbus Slave
Isolated
+5V dc
51
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