Installation
COMMUNICATION MASTER
D+ (B) SHLD D– (A)
1 2
16 SHLD | SHLD |
17 D+ (B) | D+ |
18 D– (A) | D– |
TO OTHER
COMMUNICATION
CONTROLLERS
D– D+
120 OHMS
Connect shield to ground at one end only.
120 OHMS ON LAST LEG
1 Do not run the communications lines in the same conduit as AC power. 2 Use shielded twisted pair cables (Belden 9271 Twinax or equivalent).
Figure 2-15 RS-422/485 Communications Option Connections
COMMUNICATION MASTER | 3 |
OR SWITCH |
SHLD TXD– TXD+ RXD– RXD+
1
1414SHLDSHLD
1515RXDRXD+
16 RXD –
16 RXD-
1717TXDTXD+
2
1Do not run the communications lines in the same conduit as AC power. Correct connections may require the use of an Ethernet
2Use Shielded
3Use Switch rather than Hub to maximize performance.
Figure 2-16 Ethernet Communications Option Connections
Figure 2-16 and Table 2-7 shows how to connect a UDC to a MDI Compliant Hub or Switch utilizing a straight-through cable or for connecting a UDC to a PC utilizing a crossover cable.
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