Description
Key Technical Specifications
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Model Number: DS200RTBAG4A
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Manufacturer: General Electric (GE)
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Function: RST relay terminal – brings field contacts & excitation relays into Mark V rack
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Relay Coils: 115 VAC 50/60 Hz (jumper-selectable 24 VDC or 125 VDC on later revs)
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Termination: 190-position screw-block (95 per side)
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Jumpers: 17 berg positions for coil voltage, pull-up, and filter selection
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Isolation: 2 kV basic coil-to-logic; 500 V contact-to-contact
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Connectors: 96-pin DIN 41612 to VME back-plane; screw terminals for field wires
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Operating Temperature: –40 °C…+70 °C
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Dimensions / Weight: 159 × 178 mm, 0.7 kg typical
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Protection Degree: IP20 rack-mount
- Status: Factory discontinued – new & tested spares available
Field Application & Problem Solved
In the field the biggest headache is landing dozens of field contacts and power-excitation relays—oil-pressure switches, breaker status, and 115 VAC auxiliary contacts—without turning the turbine panel into a spaghetti bowl. The DS200RTBAG4A solves that by giving you 190 screw terminals on one plug-in card. Slide it into the Mark V rack, land the wires, snap the 96-pin connector, and you’re done. You’ll typically find it on 7EA or 9F peakers where every auxiliary relay in the skid has to report back to the Speedtronic. Core value: it collapses three DIN-rail relay blocks, pull-up resistors, and high-voltage isolators into one 0.7 kg card you can swap while the unit is on turning gear
In the field the biggest headache is landing dozens of field contacts and power-excitation relays—oil-pressure switches, breaker status, and 115 VAC auxiliary contacts—without turning the turbine panel into a spaghetti bowl. The DS200RTBAG4A solves that by giving you 190 screw terminals on one plug-in card. Slide it into the Mark V rack, land the wires, snap the 96-pin connector, and you’re done. You’ll typically find it on 7EA or 9F peakers where every auxiliary relay in the skid has to report back to the Speedtronic. Core value: it collapses three DIN-rail relay blocks, pull-up resistors, and high-voltage isolators into one 0.7 kg card you can swap while the unit is on turning gear
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Installation & Maintenance Pitfalls (Expert Tips)
Coil Voltage Jumper Wrong = Smoked Relay
The silk-screen is read from the component side; set 24 V on a 115 V coil and the relay pulls in weak, chatters, and burns out in a week. Match the jumper map in GEI-100161 before you power up
The silk-screen is read from the component side; set 24 V on a 115 V coil and the relay pulls in weak, chatters, and burns out in a week. Match the jumper map in GEI-100161 before you power up
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Terminal Torque 0.8 Nm – No More
Over-tighten and the screw posts crack; under-tighten and vibration walks the wire out. Use a calibrated screwdriver and stop when the washer flattens—then tug-test every wire.
Over-tighten and the screw posts crack; under-tighten and vibration walks the wire out. Use a calibrated screwdriver and stop when the washer flattens—then tug-test every wire.
IP20 Means Keep the Door Closed
The front is open; wash-down or salt mist will corrode the screw posts and give you intermittent “contact bounce.” If the cabinet fan ingests salt, bag the card during maintenance or mount it behind a filtered door.
The front is open; wash-down or salt mist will corrode the screw posts and give you intermittent “contact bounce.” If the cabinet fan ingests salt, bag the card during maintenance or mount it behind a filtered door.
Card Is Discontinued – Verify Spare Before You Need It
Factory stock is gone; new & tested spares are available but lead-time can be 6-8 weeks. Keep one on the shelf or you’ll discover the weakness when the only spare on-site is a cracked relay base
Factory stock is gone; new & tested spares are available but lead-time can be 6-8 weeks. Keep one on the shelf or you’ll discover the weakness when the only spare on-site is a cracked relay base
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Technical Deep Dive & Overview
Internally the card is a passive relay matrix—no CPU, no firmware. Each coil hits a 2 kV isolator, a pull-up resistor, and a noise filter; the 96-pin connector carries all 190 contacts plus power to the DSP. Because it’s hardware you can hot-swap it: pull the old card, land the wires exactly where they came from, snap the connector in, and the turbine sees all relays again in under five minutes
Internally the card is a passive relay matrix—no CPU, no firmware. Each coil hits a 2 kV isolator, a pull-up resistor, and a noise filter; the 96-pin connector carries all 190 contacts plus power to the DSP. Because it’s hardware you can hot-swap it: pull the old card, land the wires exactly where they came from, snap the connector in, and the turbine sees all relays again in under five minutes
