IS200SSCHAH2A GE COMMUNICATION TERMINATION TERMIINAL

GE IS200SSCHAH2A Communication Termination Terminal – Detailed Product Introduction

NOTE: Public English documentation specifically for “IS200SSCHAH2A” is very limited. The description below is based on the closely related and well-documented GE Mark VI “IS200SSCAH2A Communication/Serial Communication Termination Board” and GE Speedtronic Mark VI/Mark VIe system documentation, which describe the same family of communication termination terminals. Where information is inferred rather than directly confirmed for IS200SSCHAH2A, I’ve made that clear.【turn0fetch0】【turn1fetch0】【turn0fetch1】

1. Product Overview

Part Number: IS200SSCHAH2A

Manufacturer: General Electric (GE)

Product Type: Communication Termination Terminal / Serial Communication Termination Terminal Board

System Family: GE Speedtronic Mark VI turbine control system (also commonly associated with Mark VI/Mark VIe gas and steam turbine control applications).【turn0fetch0】【turn1fetch0】

Primary Role:

Provides a field‑wiring termination and signal conditioning interface for serial communication links within the turbine control system.

Acts as the physical termination point between external serial communication cables (e.g., to operator interfaces, HMIs, or external controllers) and internal control system boards via a 37‑pin connector (JA1).

Supports configurable grounding and termination options through on‑board jumper settings.

The IS200SSCHAH2A is designed as a compact, low‑component termination board used in GE Speedtronic Mark VI turbine control panels. It is part of the overall Serial Communication Termination (SSC) terminal board family and is typically mounted inside the control cabinet as a wiring hub and interface board.【turn0fetch0】【turn1fetch0】【turn0fetch1】

2. System Context and Application

2.1 GE Speedtronic Mark VI Control System

The GE Speedtronic Mark VI is a gas and steam turbine management system used in power generation and petrochemical plants.

It provides:

Turbine control (speed, load, temperature)

Protection and sequencing

Communication with plant DCS, operator stations, and auxiliary equipment

Within the Mark VI system, various “terminal boards” (like IS200SSCHAH2A) are used to:

Terminate field wiring

Adapt signals between external devices and control processors

Provide convenient points for grounding, termination, and jumper configuration【turn0fetch0】【turn1fetch0】

2.2 Role of IS200SSCHAH2A in the System

Typical functions and applications include:

Serial Communication Termination:

Terminates serial communication cables that link the Mark VI control system to:

Operator interfaces (HMI/OWI)

Plant DCS or supervisory systems

Other controllers or gateways using RS‑232/RS‑485 or similar serial links (exact signaling depends on system architecture).【turn1fetch0】

Wiring Hub and Field Interface:

Provides a standardized, secure screw‑terminal connection point for field communication cables, reducing wiring stress on controller boards and making maintenance easier.

Helps organize and label communication wiring within the control cabinet.

Grounding and Signal Conditioning:

Offers configurable grounding and termination via multiple jumper switches, allowing adaptation to different field wiring practices and noise environments.【turn0fetch0】【turn1fetch0】

Support for Redundant/Multi‑drop Links (system‑dependent):

Depending on cabinet and system design, multiple termination points or multi‑drop serial links may be supported. The board’s two rows of 24 terminals allow flexible connection schemes.

2.3 Typical Industries and Installations

Power generation:

Gas turbine power plants

Steam turbine power plants

Combined‑cycle plants

Oil & gas:

Mechanical drive turbines for compressors and pumps

Industrial plants:

Any installation using GE Speedtronic Mark VI/Mark VIe turbine controls that require serial communication termination points.【turn0fetch0】【turn1fetch0】

3. Key Functional Features

3.1 Communication Interface

External Communication Connections:

Up to 48 screw terminals arranged in two rows of 24 terminals are provided for connecting communication cables (shielded twisted pair, multi‑core cables, etc.).【turn0fetch0】【turn1fetch0】【turn0fetch1】

These terminals are typically used for signal lines and shields/grounds associated with the communication links.

Internal System Connection:

A 37‑pin connector designated JA1 is used to connect the termination board to the internal Mark VI system/backplane or associated communication boards via an internal cable assembly.【turn0fetch0】【turn1fetch0】【turn0fetch1】

JA1 carries the signals between the field wiring side and the controller/communication processors.

3.2 Configurable Grounding and Termination

Jumper Configuration:

The board includes 18 jumper switches used to configure:

Grounding schemes for the communication lines (e.g., grounding of cable shields at one end or both ends).

Termination options to match line impedance and reduce reflections in serial communication links.【turn0fetch0】【turn1fetch0】【turn0fetch1】

One group of jumpers controls grounding.

Two groups of jumpers control termination configurations.

Clearly Marked Settings:

Jumper positions are labeled on the PCB to assist panel builders and maintenance personnel in correctly configuring the board for the intended application.【turn1fetch0】【turn0fetch1】

3.3 Compact, Simple Board Design

Component Count:

The board is designed as a small, simple termination board with only a few components, focusing on reliability and ease of wiring rather than active signal processing.【turn0fetch0】【turn0fetch1】

Passive Design:

Primarily consists of:

Terminal block

Connector JA1

Jumpers

Resistors and capacitors for termination and filtering

No complex active circuitry is exposed on this board; most protocol handling is done by connected controller/communication modules.

Mounting Features:

Two larger circular slots on the PCB are used for secure mounting to the cabinet or sub‑panel, ensuring the board remains mechanically stable during installation and operation.【turn1fetch0】【turn0fetch1】

3.4 Field Wiring Friendliness

Screw Terminal Block:

48 screw terminals allow secure connection of stranded or solid wires without special tools.

Two rows of 24 terminals make it easy to organize inbound and outbound communication pairs and shields.

Cable Support and Strain Relief:

In practice, installers typically use external cable ties or clamps to secure communication cables near the terminal board, reducing mechanical stress on the screw terminals.

Accessibility:

The board is designed to be mounted where field wiring can be comfortably made and inspected, such as on a cabinet door or interior panel.

4. Mechanical and Physical Characteristics (Based on SSC Family / IS200SSCAH2A)

Note: Exact dimensions and weight for IS200SSCHAH2A are not publicly specified in the sources we accessed. The following values are based on the closely related IS200SSCAH2A board and should be treated as indicative only. Please verify with GE or supplier documentation before making mechanical design decisions.【turn0fetch1】【turn1fetch0】

Approximate Dimensions (IS200SSCAH2A as reference):

Length × Width × Height: about 37 × 30 × 4 cm (this figure appears unusually large in one source and may refer to packaging; board‑level dimensions are typically closer to a few hundred millimeters — please confirm from actual unit or data sheet).【turn1fetch0】

Weight (IS200SSCAH2A as reference):

Around 0.08–0.5 kg, depending on whether the weight is for the bare PCB, the terminal block only, or the packaged assembly.【turn0fetch1】【turn1fetch0】

Terminal Block:

48 screw terminals, 2 rows of 24 terminals each.【turn0fetch0】【turn1fetch0】【turn0fetch1】

Connectors:

JA1: 37‑pin cable connector for internal system connection.【turn0fetch0】【turn1fetch0】【turn0fetch1】

Mounting:

Two large circular mounting slots/screw holes for secure mechanical attachment to the cabinet structure.【turn1fetch0】【turn0fetch1】

Construction:

FR4 PCB with industrial‑grade solder mask and silkscreen.

Terminal block designed for reliable long‑term connection in power‑plant environments.

5. Electrical and Configuration Characteristics

5.1 Signal Types and Voltages (System‑Level)

The board itself does not generate or actively drive communication signals; it:

Terminates external communication cables.

Routes signals to the 37‑pin JA1 connector.

Provides termination resistors and grounding paths as configured by jumpers.

The actual electrical characteristics (voltage levels, baud rates, protocol type) are determined by:

The Mark VI controller or communication module connected via JA1.

The connected field device(s) and the serial communication standard used (e.g., RS‑232, RS‑485, or proprietary GE serial links).【turn1fetch0】

5.2 Termination and Impedance

Resistor and Capacitor Networks:

Lines of resistors and capacitors are present on the board to provide termination and filtering for the communication lines.【turn0fetch0】【turn1fetch0】【turn0fetch1】

Jumper‑Configurable Termination:

Users can enable or disable termination and/or select different configurations via the 18 jumper switches, depending on cable length, baud rate, and noise requirements.

5.3 Grounding and Shielding

Ground Reference Control:

One set of jumpers is dedicated to controlling how the communication cable shields and signal grounds are referenced (e.g., chassis ground, signal ground, or floating).【turn0fetch0】【turn1fetch0】【turn0fetch1】

Shield Termination:

Typical usage involves connecting shield(s) from the communication cable to appropriate terminals and configuring jumpers so that shields are grounded according to plant grounding practices (e.g., single‑point grounding).

6. Installation and Wiring Considerations

6.1 Mounting

Locate the board in a clean, accessible area inside the control cabinet.

Use the two mounting slots/holes to secure the board to a sub‑panel or mounting plate.

Ensure adequate space around the terminal block for:

Incoming and outgoing cable bending radius.

Tool access for screwdriver terminals.

Cable tie points for strain relief.

6.2 Field Wiring

Prepare communication cables with appropriate ferrules or properly tinned wire ends for reliable screw termination.

Connect:

Communication signal pairs to the designated terminals according to the system wiring diagrams.

Cable shield(s) to the designated shield/ground terminals.

Tighten screw terminals to the manufacturer’s recommended torque to avoid loose connections or damage.

6.3 Jumper Configuration

Refer to:

The Mark VI system documentation and the specific panel drawing for your installation.

Labels on the PCB indicating jumper functions (ground vs. termination).【turn1fetch0】【turn0fetch1】

Configure jumpers before energizing the system whenever possible.

If changes are required in an energized system, strictly follow plant safety procedures and GE’s recommendations.

6.4 Connection to Controller

Route the cable from JA1 to the appropriate controller or communication board as defined in the system documentation.

Ensure the connector is fully seated and properly secured (e.g., using jackscrews if present).

7. Commissioning, Troubleshooting, and Maintenance

7.1 Commissioning Checks

Before normal operation, typical verification steps may include:

Visual Inspection:

Confirm correct jumper positions according to the design.

Check all screw terminal connections are tight.

Verify that the board is securely mounted and that there is no visible damage.

Continuity and Insulation Checks:

Use a multimeter to verify correct continuity for signal and shield connections.

Check for unintended shorts between terminals or to ground.

Communication Testing:

Use system diagnostic tools or connected operator interfaces to verify that serial communication is functioning correctly.

Verify error rates, link status, and expected data exchange.

7.2 Typical Faults and Remedies

Intermittent Communication:

Check screw terminal tightness.

Verify shield grounding is as intended and not introducing ground loops.

Confirm jumper termination settings match the communication baud rate and line length.

Complete Communication Loss:

Verify cables between the field devices and the board.

Verify the cable between JA1 and the controller board is connected and undamaged.

Check that the controller/communication module is operational and configured correctly.

Noise-Induced Errors:

Ensure proper shield termination and grounding.

Check routing of communication cables to avoid proximity to high‑power cables or noisy equipment.

7.3 Maintenance

Periodic Inspection:

Check for signs of corrosion, loose screws, or mechanical damage.

Confirm jumpers have not been accidentally changed.

Cleaning:

If required, clean the PCB and terminals using appropriate methods (e.g., dry air or ESD‑safe brush), avoiding damage to components.

Spare Parts:

Maintaining a spare IS200SSCHAH2A or compatible SSC termination board can reduce downtime in critical applications.

8. Ordering and Identification

Manufacturer: General Electric (GE)

System: Speedtronic Mark VI (typically used with Mark VI turbine control systems)

Family: SSC (Serial Communication) termination boards

Part Number: IS200SSCHAH2A

Typical Descriptions (as used by suppliers):

“Communication Termination Terminal”

“Serial Communication Termination Board”

“COMM TERMIN / SERIAL COMM TERMBD” (based on IS200SSCAH2A descriptions)【turn0fetch0】【turn1fetch0】【turn0fetch1】

Because public, authoritative English data specifically for “IS200SSCHAH2A” is scarce, for critical applications you should:

Obtain the official GE data sheet or manual for the exact part number revision.

Compare against IS200SSCAH2A documentation and confirm whether IS200SSCHAH2A is a variant, revision, or drop‑in replacement.

Consult GE or your GE‑certified service provider if the board is used in safety‑critical or high‑availability turbine control functions.

9. Summary

The GE IS200SSCHAH2A Communication Termination Terminal is a compact, passive termination board in the GE Speedtronic Mark VI turbine control system family. It serves as the wiring interface between external serial communication cables and the internal control system, providing:

48 screw terminals in two rows for field connections

A 37‑pin JA1 connector for internal system connection

Configurable grounding and termination options via 18 jumper switches

A simple, robust design optimized for power‑plant and industrial environments【turn0fetch0】【turn1fetch0】【turn0fetch1】

This type of board is critical for ensuring reliable serial communication between turbine controls and external equipment such as operator stations, plant DCS, and other controllers. Proper installation, grounding, termination configuration, and periodic maintenance are key to maintaining communication integrity and overall turbine control system reliability.