GE DS200RTBAG2AFB Relay Trunk Terminal Board (RTBA)

Description

Hardware & Electrical Specifications

‑ Model: DS200RTBAG2AFB ‑ Part Number: DS200RTBAG2AFB ‑ Module Type: Mark‑V RTBA Relay Trunk Terminal PCB Board ‑ Mounting: Screw‑fixed rack‑mount inside turbine control cabinet ‑ Power supply: 24 VDC coil power supplied from Mark‑V rack backplaneAX Control… ‑ Relay Configuration:  • Total 10 relays (K20‑K29)  • 7 × DPDT relays (Form‑C contacts)  • 3 × 4PDT relays (Form‑C multi‑pole contacts) ‑ Field Terminals: 52 screw terminals for field‑wiring connection ‑ Surge Protection: MOV metal‑oxide‑varistor over‑voltage suppression for each relay channel ‑ Configuration components: Multiple Berg‑type jumpers for signal‑path assignment; strictly copy original jumper positions during replacement ‑ Connectors: Dual stab‑type backplane connectors; multi‑pin RPL ribbon‑cable connector; 52‑position field‑terminal block ‑ Diagnostics resources: Relay‑status LED indicator lamps for each relay channel ‑ PCB treatment: Industrial conformal‑coated multilayer circuit board (‑AFB revision) ‑ Compatibility note: Exclusively for GE Speedtronic Mark‑V gas / steam turbine and EX2000 excitation platforms; not drop‑in compatible with Mark‑VI / Mark‑VIe. After replacement, duplicate original jumper‑settings, verify stab‑connector full engagement, check every relay‑channel pull‑in & status‑LED indication, inspect dry‑contact output before applying field‑side load voltage.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃ ‑ Storage temperature: −40 ℃ ~ +85 ℃ ‑ Relative humidity: 5%‑95% non‑condensing ‑ Installation location: Indoor turbine‑control cabinet, Pollution Degree 2, IP20 ‑ EMC compliance: Industrial EMC requirements for power‑generation turbine‑control‑room equipment ‑ Certifications: CE, UL compliant for power‑plant control‑system components

Mechanical Data

‑ Board dimension: approx 178 mm × 165 mm ‑ Mounting: Four‑point screw‑fixed cabinet rack‑mount ‑ Weight: approx 0.55 kg

Main Functions

1. Provides 10‑channel isolated relay dry‑contact outputs for Mark‑V system: implement turbine trip‑logic, permissive interlock, alarm‑relay output, auxiliary excitation‑drive interlock‑signal switching.
2. 52‑position screw‑terminal block serves as field‑wiring termination point; backplane stab‑connectors receive drive‑commands from Mark‑V main CPU boards.
3. MOV surge‑suppression components absorb field‑side voltage‑spikes, suppress contact‑arcing and extend relay service life. Hardware jumpers complete signal‑path assignment matching project‑specific I/O‑logic requirements.
4. Per‑channel status‑LED lamps assist commissioning, real‑time status‑monitoring and field‑fault‑isolation maintenance work.

Installation & Wiring Requirements

1. Cut off rack 24VDC control power before installation or replacement. Non‑hot‑swappable. ESD wrist‑strap protection is mandatory during board handling.
2. Secure DS200RTBAG2AFB onto cabinet rack. Reproduce jumper‑configuration exactly consistent with original‑board hardware settings. Guarantee dual stab‑backplane connectors fully seated; tighten all field‑terminal‑block wiring.
3. All field‑wiring must strictly follow Mark‑V system‑wiring drawings. Reliable protective‑earth connection for control cabinet is mandatory.
4. After replacement: Restore rack control‑power. Verify each relay channel pull‑in action and corresponding status‑LED indication. Measure dry‑contact‑continuity for every output channel. Complete static‑logic‑verification test before putting turbine‑unit into service.
5. Replacement note: Incorrect jumper‑configuration, poor stab‑connector contact or loose field‑terminals will cause relay‑mis‑operation, loss of trip / permissive‑logic function, which may lead to unit‑trip‑events. Full‑system relay‑logic function verification test is mandatory before turbine‑unit commissioning.