GE 369B1874G0019 Digital Output TB Relay Out 16CHs

Key Features and Specifications

  • Part Number: 369B1874G0019
  • Module Type: Digital Output Terminal Board
  • Channels: Up to 16 digital output channels
  • Primary Function: Provides a durable and isolated interface for connecting control systems to field devices.
  • Output Type: Dry contact or open collector (pack dependent)
  • Output Voltage: 24 VDC nominal
  • Isolation: Optical isolation per channel (>1500V RMS)
  • Max Output Current: Up to 0.5 A per channel
  • Status Indication: Per-channel LED indicators
  • Mounting: DIN-rail or chassis mount
  • Conformal Coating: Yes, for environmental protection
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Product Brief Description

The GE 369B1874G0019 is a Digital Output (DO) Terminal Board designed to expand the control capabilities of industrial systems. It provides up to 16 digital output channels that are essential for connecting the system’s low-voltage I/O pack to a wide range of external, high-power field devices. A key function of this board is to provide optical isolation, ensuring that the sensitive control electronics are protected from voltage spikes and noise originating from the connected equipment.

Detailed Product Description

This board serves as an interface between the main control system (such as the GE Mark VIe or EX2100e) and field devices like solenoids, contactors, and alarms. It receives low-power digital signals from the control system and, via its internal circuitry, uses these signals to switch external devices on or off. The use of dry contact or open collector outputs, depending on the I/O pack configuration, allows for flexibility in application. The board’s design prioritizes reliability and safety, which is why each channel is equipped with LED indicators to provide a quick visual status of the output state.

Key Features and Specifications

  • Part Number: 369B1874G0019
  • Module Type: Digital Output Terminal Board
  • Channels: Up to 16 digital output channels
  • Primary Function: Provides a durable and isolated interface for connecting control systems to field devices.
  • Output Type: Dry contact or open collector (pack dependent)
  • Output Voltage: 24 VDC nominal
  • Isolation: Optical isolation per channel (>1500V RMS)
  • Max Output Current: Up to 0.5 A per channel
  • Status Indication: Per-channel LED indicators
  • Mounting: DIN-rail or chassis mount
  • Conformal Coating: Yes, for environmental protection

Functional Role in a System

Within an industrial control system, the 369B1874G0019 is the bridge between the digital control logic and the physical world. For example, a command to “start pump 1” is sent from the control processor to the I/O pack, which then sends a low-voltage signal to the terminal board. The board activates the corresponding relay, which closes a contact and completes a separate, high-voltage circuit to energize the motor starter for the pump. This process is fully isolated and monitored, ensuring reliable and safe operation.

Common Applications

The board is a critical component in systems that require precise and reliable control over a large number of discrete devices. Its applications include:

  • Power Generation Systems: Used in GE’s Mark VIe turbine control systems to manage valves, breakers, and other turbine auxiliaries.
  • Industrial Automation: Activating and deactivating various machines, lights, and alarms on a production line.
  • Excitation Control: Used in the EX2100e platform to manage the exciters for generators.
  • Process Control: To control a variety of field-actuated devices in industrial processes.