MeloAuto-Trusted PLC & DCS Parts Supplier
The GE DS200RTBAG5A DS200RTBAG5AHC power excitation board controls field contactors for generator excitation systems. This board drives external relays and contactors for exciter control. You will find this excitation board in GE Mark V excitation cabinets. Its robust design ensures reliable field flashing and de-excitation.
Excitation Output Architecture
This power excitation board features eight high-current relay output channels. Consequently, it controls multiple field contactors from a single board. The GE DS200RTBAG5A DS200RTBAG5AHC accepts 24V DC logic inputs from the main controller. Moreover, each output includes an LED status indicator. You can monitor contactor states directly from the board.
Technical Specifications
| Parameter | Value |
|---|---|
| Output Channels | 8, relay (form A, normally open) |
| Contact Rating | 5A at 250V AC or 30V DC |
| Coil Voltage | 24V DC (from backplane) |
| Response Time | 10 ms typical |
| Mechanical Life | 10 million operations |
| Electrical Life | 100,000 operations at rated load |
| Dimensions | 240mm x 180mm x 35mm |
| Weight | 0.72 kg (1.59 lbs) |
| PCB Layers | 6 |
| Onboard Components | 8 relays, 8 LEDs, 8 suppression diodes |
| Connector Count | 3 (ribbon cable to driver, field output, status) |
| Terminal Type | Screw clamp, 22-14 AWG |
| Status Indicators | 8 LEDs (one per channel, relay energized) |
| Energy Storage | None (passive board) |
| Isolation Voltage | 1500V (coil to contacts) |
| Contact Material | Silver alloy with gold flashing |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
Relay Contacts and Status Monitoring
The unit includes high-quality relays with normally open contacts. Therefore, they switch field contactors reliably without welding. This board replaces the DS200RTBAG5AHC version without any wiring changes. Simply remove the old board and install this one. GE designed this excitation board for single-slot installation. Hence, it fits directly into existing Mark V rack positions.
Six PCB layers separate coil traces from contact wiring. Three connectors handle all ribbon cable, field output, and status signals. The GE DS200RTBAG5A DS200RTBAG5AHC includes suppression diodes across each relay coil. Accordingly, it protects the driver board from inductive kickback. Eight LEDs show the energized state of every relay clearly.
Installation and Wiring Guide
You can terminate field wires using standard screw terminals. The terminals accept wire gauges from 22 AWG to 14 AWG. The GE DS200RTBAG5A DS200RTBAG5AHC works with all GE Mark V excitation systems. Always strip 6-8 mm of insulation before inserting wires. Proper torque on terminal screws prevents loose connections over time.
The relay contacts are normally open and close when energized. Do not exceed the maximum contact rating of 5A per channel. The GE DS200RTBAG5A DS200RTBAG5AHC provides reliable power excitation for generator control. Installation requires only a flathead screwdriver for field wiring. This board operates in non-condensing environments with adequate clearance.