The GE Instruments 8115-DO-DC, also cataloged as the 8115-DO-DC Discrete Output Module, operates as a dedicated hardware component for switching direct current field loads within industrial control networks. The module executes solid-state switching across eight independent output channels operating from 2 VDC to 60 VDC. Power to drive output loads and channel circuitry is sourced directly through the internal backplane architecture, eliminating the requirement for external secondary logic supply wiring to each channel terminal point.

Hardware Specifications

Backplane Bus Communication Velocity and Firmwire Execution

The GE Instruments 8115-DO-DC module integrates directly into the local I/O rack backplane bus, enabling high-speed deterministic command transfers from the central processing unit to output channels. Internal backplane bus communication velocity guarantees low propagation latency during logic state changes. Channel registers maintain active firmware flash compatibility to prevent mismatched control frames from triggering output latches. Built-in bus diagnostic subroutines continuously evaluate power draw and signal integrity across the backplane edge connectors.

Frequently Asked Questions

Q: Are the eight output channels galvanically isolated from each other on the 8115-DO-DC?

A: No, the output channels on this module are non-isolated and share a common return pathway across the internal module power bus.

Q: How is logic power provided to the individual discrete output channels?

A: The module is module-powered, deriving its necessary operating and drive power directly from the backplane assembly without requiring external field logic supply connections.

Field Installation Guidelines

1. De-energize the backplane chassis and connected field wiring prior to inserting or removing the 8115-DO-DC module to prevent electrical arcing across edge connector contacts.
2. Secure the module onto the chassis mounting rail using standard retention clips or screws to ensure continuous ground contact with the backplane frame.
3. Keep 24-60 VDC output wiring segregated from low-voltage analog communication cables and high-voltage AC power lines in separate wire ducts to prevent inductive noise coupling.
4. Verify that total continuous current drawn across all eight channels does not exceed the maximum thermal dissipation limit specified for the backplane chassis slots.