FP-DI-330
4
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Table 1 lists the terminal assignments for the signals associated
with each channel.
Universal Input Circuit
The universal inputs of the FP-DI-330 consist of bi-directional
optical isolators with current-limiting circuitry. Each channel has
two signal inputs, INa and INb, which are interchangeable. When
a voltage is applied between the INa and INb inputs of a channel,
signal current flows through the input and turns on the optical
isolator, registering as an ON condition. The current-limiting
circuitry limits the amount of current flow to 1.5 mA, even when
the applied voltage is as high as 250 Vrms.
Each input is functionally isolated from the other inputs and may
be wired independently, but this is not a safety isolation.
Warning
Do not mix circuits with hazardous voltages
and human accessible circuits on the same module!
For more information, refer to the
Isolation and Safety Guidelines
section of this document.
Table 1.
Terminal Assignments
Channel
Terminal Numbers
INa, INb
V
sup
COM
0
1, 2
17
18
1
3, 4
19
20
2
5, 6
21
22
3
7, 8
23
24
4
9, 10
25
26
5
11, 12
27
28
6
13, 14
29
30
7
15, 16
31
32
Summary of Contents for FieldPoint FP-DI-330
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