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Spectrum Controls 1746sc-OAP8I User Manual

Page 7

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Installation Instructions

Isolated-Circuit
Discrete Input and Output Modules

5

As noted in the previous table, these 1746sc-Series modules provide 1500 V
point-to-point isolation. This point-to-point isolation means:

• shorts, overloads, or noise on one circuit won’t affect devices on other

circuits.

• different power sources can be connected to the same module without

damaging components due to excessive voltage differences between points.

• interposing relays aren’t needed to achieve these benefits, saving space and

simplifying installation.

The 1746sc-OAP8I provides some additional benefits:

• each output circuit is individually fuse protected.

• blown fuses are indicated to the user through an LED and to the logic

controller through the logic controller’s input image table. This allows for
fuse monitoring and smart power-down sequencing of equipment after a
circuit failure.

For more information on the benefits of isolated circuits and other features of
the 1746sc-Series modules, call your local distributor or Spectrum Controls
(425-746-9481).

This manual is related to the following products: