120
Hardware Installation—Installing the
IFC-1010/2020
sce8
Figure 87: SCS-8
EIA-485
Reference
EIA-485
Reference
EIA-485
Reference
EIA-485
Reference
EIA-485 circuit characteristic impedance of
twisted-pair wiring should be approximately 120 ohms.
ACM-16AT ACM-32A
120 ohms,
1/4 watt
eiasib
SIB-2048A
or SIB-NET
CPU-2020
or CPU-2
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
10
9
8
7
6
5
4
3
2
1
P3
P5
P2
P4
P10 P9 P8 P7 P6
AMG-1
654321
654321
TB2
TB1
4-
3-
2+
1+
7
6
5
4
3
2
1
TB2
TB1
4-
3-
2+
1+
7
6
5
4
3
2
1
Figure 88: EIA-485 to SIB Connections
Refer to Circuit/Device Ratings and Connections Technical Bulletin
(LIT-448160) for EIA-485 circuit ratings and limitations.
Note: If the SIB is not the first (end) device on the EIA-485 circuit, set
SW1 on the SIB to the out position.
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