IS200SPROH1A | GE Mark VIe Backup Protection Terminal Board

IS200SPROH1A – GE Mark VIe Backup Protection Terminal Board

The IS200SPROH1A is a Backup Protection Terminal Board from General Electric for the Mark VIe series. It conditions speed signals and hosts a PPRO I/O pack. This board also houses two potential transformers (PTs) for bus and generator voltage sensing. Designed for industrial turbine control, it offers 12 relay channels and robust DIN-rail mounting.

Key Technical Specifications

• Part Number: IS200SPROH1A
• Manufacturer: General Electric
• Series: Mark VIe
• Product Type: Backup Protection Terminal Board
• Relay Channels: 12
• Voltage Sensors: 2 (generator and bus)
• Speed Pickup Range: 2 Hz (magnetic)
• Power Supply: +5 V DC, 6 A; 24 V DC
• Speed Sensitivity: 27 mV
• Mounting: DIN rail
• Technology: Surface mount
• Operating Temp: 30…65 °C
• Dimensions: 15.9 x 17.8 cm
• Origin: United States
• Manual: GEH-6721D

Functional Description

• Hosts a PPRO I/O pack directly on the JA1 connector.
• Conditions speed signal inputs for the PPRO module.
• Includes two PTs for bus and generator voltage feedback.
• Provides a DC-37 connector (JA3) for backup trip relay cable.
• SPROH1A variant: 24 barrier terminals in a pluggable block.
• SPROH2A variant: 24 pluggable Euro-style box terminals.

Installation & Wiring

• Mount on DIN rail using a sheet metal carrier with plastic insulator.
• Alternative panel mount via bolt-on sheet metal assembly.
• Use #18 AWG wires for speed signals and PT inputs.
• Barrier terminal block is removable for board replacement.
• PPRO pack plugs into JA1 connector; trip cable connects to JA3.

Operational Details

• Terminals 1–4: PT inputs to the SPRO.
• Terminals 19–24: Three speed inputs.
• Terminals 7–15: Reserved for future expansion (route to JA1).
• Terminals 5–6 and 16–18: No connection.
• JA1 and JA3 provide PPRO pack and trip board cable interfaces.

Oiltech Controls Insight

• This board is critical for GE turbine backup protection systems.
• Works with Mark VIe distributed control systems.
• Reliable speed monitoring with 2 Hz magnetic pickup sensitivity.
• Surface mount technology ensures durability in harsh environments.
• Ideal for power generation, oil & gas, and heavy industry.

Typical Applications & Compatible Equipment

• GE gas and steam turbine control panels.
• Backup protection for generator and bus voltage monitoring.
• Speed detection systems in power plants.
• Compatible with Mark VIe controllers and I/O packs.

Professional FAQ – Experience & Selection Guide

• Q1: Can I use this board without a PPRO pack?
  No, it is designed to host a PPRO I/O pack for full functionality.
• Q2: What is the difference between SPROH1A and SPROH2A?
  Terminal type: H1A has barrier terminals; H2A has Euro-style box terminals.
• Q3: Is this board compatible with older Mark V systems?
  No, it is specifically for Mark VIe. Use the correct series for your system.
• Q4: How do I verify the board works before installation?
  We perform full functional testing, including speed and PT input checks.
• Q5: What cable is needed for the trip relay connection?
  A DC-37 pin cable connects JA3 to the backup trip terminal board.

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spare parts.
• Global shipping via FedEx, UPS, or DHL – 24-28 hour dispatch.
• All units tested (surplus or refurbished) before shipment.
• 12-month warranty for reliability and confidence.
• Technical verification performed on every board.
• Expert support for obsolete control systems.

Shipping & Warranty

• Dispatch within 24-28 hours after order confirmation.
• Carriers: FedEx, UPS, DHL – express or economy options.
• 12-month warranty covers defects and workmanship.

Contact: info@oiltechcontrols.com | +86 158 8020 0923 (WhatsApp)

Copyright © 2026 Oiltech Controls Limited. https://www.oiltechcontrols.com/ All rights reserved.