Brand new GE 820-0394 WESTERM D10 KR

D20 Control Module Overview

The D20 Control Module consists of two detachable parts: the WESTERM D20 K and the WESDAC D20 K.

• WESDAC D20 K (Top Module):
  This module processes acquired data and communicates with the main D20 processor (see Figure 2).

• WESTERM D20 K (Bottom Module):
  This is the termination board where all field wiring connections are made. It manages all connections to and from the WESDAC D20 K module, including:

• The D.20 network ports

• The 9600 baud RS232 maintenance port

• The WESDAC D20 K module address

• Relay outputs

• External DC supply for control output voltage

Key Features

• The D20K is a 32-point control output interface module.

• The 32 output drivers can be configured in various hardware/software arrangements based on system requirements.

• It ensures secure operation of the control output interface, with all control actions (initiated, timed, reset, and validated) managed by the D20K upon requests from the main D20 processor.

• Provides a Local/Remote switch for maintenance:

• This manually operated switch disables relay coil power on the D20K during maintenance.

• An off-line indication is sent to the main D20 processor and is available as a pseudo-status to the host system.

Connectivity

• Two DB9 connectors allow daisy chaining of the D.20 Link, enabling communication between the main D20 CPU processor and the WESDAC D20 K.

• Power for the WESDAC D20 K is also supplied via the same cable assembly.

• A single DB9 connector is provided for the WESMAINT D20 maintenance port, which connects to a VT100 terminal emulator for diagnostics.

• The address jumper block for the WESDAC D20 K is located on the WESTERM D20 K, defining the module’s address on the D.20 link.

Design Advantages

• The WESTERM D20 K contains only passive components, with all active components mounted on the WESDAC D20 K.

• This modular design simplifies field repair and maintenance because the WESDAC D20 K module can be replaced without disturbing any field wiring.