Emerson 396897-02-9 ControlWave I/O Board

The Emerson 396897-02-9, also cataloged as the 396897-02-9 Input/Output Module, operates as a dedicated hardware component for multi-channel field signal processing within Emerson ControlWave automation networks. This non-isolated add-on board interfaces directly with system backplanes to condition discrete and analog signals for local controller execution.

Hardware Specifications

FOUNDATION Fieldbus & Channel Isolation Architecture

The Emerson 396897-02-9 provides direct bus-level processing without onboard channel-to-channel isolation. To maintain noise immunity and field signal integrity across connected loop networks, the board relies on centralized power regulation and common-ground reference planes. This internal architecture allows low-power data exchange with upstream controller CPUs while supporting downstream integration with 4-20 mA HART loop protocol instruments and FOUNDATION Fieldbus field network topologies.

Frequently Asked Questions

Q: What is the backplane current draw for the 396897-02-9 I/O module?

A: The module draws a nominal current load of 46 mA from the internal 3.3 VDC logic power bus.

Q: Does the 396897-02-9 module feature internal channel-to-channel galvanic isolation?

A: No. The card is designed as a non-isolated I/O board, requiring external signal isolators if field channels exhibit potential ground loops.

Field Installation Guidelines

1. De-energize system backplane power and verify that all field wiring loops are isolated before inserting the module.
2. Align the 396897-02-9 card edge connector with the designated slot guide rails on the ControlWave base rack.
3. Press the board firmly into the slot until the backplane connector fully seats.
4. Tighten top and bottom retention screws to ensure chassis earth ground contact and prevent physical movement.
5. Route non-isolated signal cables through grounded metal wire ways, keeping low-voltage I/O lines separated from high-voltage power wiring.