
26 UDC 6300 Process Controller Product Manual 1/03
2.6 Wiring Diagrams, Continued
Communications
option connections
There are several types of Communications option available:
• RS422ASCII - also refer to Document # 51-51-25-35
• DMCS - also refer to Document # 82-50-10-26
• RS485RTU - also refer to Document # 51-52-25-53
• RS485TDC - also refer to Document # PM12-520
Figure 2-13 Communications Option Connections
1
2
3
4
5
6
7
8
9
10
11
12
13
L1
L2/N
22
23
14
15
16
17
18
19
20
21
D–
D+
MODBUS 485RTU
RS422/485
DMCS
COMMUNICATION MASTER
(A) (RTN) (B)
D+
SHLD
D–
120 OHMS
TO OTHER
COMMUNICATION
CONTROLLERS
D+D–
120 OHMS ON LAST LEG
Connect shield wires together with the supplied crimp part number 30755381-0011
2
Do not run these lines in the same conduit as AC power.
1
2
217583
3
Use shielded twisted pair cables (Belden 9271 twinax or equivalent)
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