Figure 9.
Connecting Single-Ended Line Drivers
Diff In 0+
Diff In 0–
Phase A
Twisted Pair
Twisted Pair
Diff In 1+
Diff In 1–
Phase B
External Device
Industrial Controller
+
–
+
–
TTL I/O
The following image shows the circuit for a bidirectional TTL I/O.
Figure 10.
TTL Input/Output Circuit
100
Ω
TTL_OUT
TTL_OE
TTL_IN
10 k
Ω
FB
TTL I/O
Power Input Connectors
The IC-3173 requires a power supply to power the system and, if you want to use the isolated
outputs, a power supply to power the isolated outputs.
Table 4.
System Power Connector Terminals
Terminal
Description
V
1
System power (9-30 VDC)
C
Common signal
V
2
System power (9-30 VDC)
12
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IC-3173 User Manual
