Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 100–150 VDC); 24 VDC compatible with external adapter |
| Input Redundancy | Dual independent inputs with automatic failover (diode‑ORed) |
| Output Rails | +5 VDC / 12A (logic power), ±15 VDC / 2A (each rail, analog circuits) |
| Isolation | Full isolation (1.5kV input‑to‑output, 2.0kV output‑to‑ground) |
| Protection | Overcurrent protection (adjustable per output via jumpers), short‑circuit protection, transient suppression (4kV), reverse polarity protection, input undervoltage lockout |
| Regulation | Load regulation: ±0.3%; Line regulation: ±0.15%; Ripple: < 25mVpp (+5V), < 15mVpp (±15V) |
| Monitoring | 4 analog feedback channels (voltage and current monitoring for each output rail); 2 digital fault outputs (relay, 24V/1A) for output faults and input failover |
| Digital Interface | 2 digital inputs for external enable/disable; 2 digital outputs for status indication |
| Operating Temperature | –25°C to +60°C |
| Form Factor | 6U × 6HP (30mm) – requires 1.5 slots |
| Backplane Connector | Standard VME 96‑pin P1 + reinforced 60‑pin P2 (for second input and high‑current outputs) |
| Status LEDs | 6 indicators: INPUT 1 OK (green), INPUT 2 OK (green), +5V OK (green), ±15V OK (green), FAULT (red), FAILOVER ACTIVE (amber) |
| Certifications | CE, UL 508 (non‑hazardous locations only) |
| Efficiency | ~83% at full load |
Critical note: The DS3800NRRA is a redundant rack power interface designed for auxiliary I/O racks and satellite cabinets. It is physically wider (6HP) than standard 4HP boards and requires 1.5 adjacent slots. Hot‑swapping is not supported.
Key Features & Advantages
-
Redundant I/O Rack Power – The DS3800NRRA accepts two independent 125VDC inputs with automatic failover, ensuring uninterrupted power to auxiliary I/O racks during input loss.
-
Individual Output Protection – Each output (+5V, +15V, –15V) has independent overcurrent protection with adjustable thresholds, preventing a fault on one output from affecting others.
-
Comprehensive Monitoring – Four analog feedback channels provide voltage and current telemetry for all output rails, enabling remote monitoring of rack power health.
-
Two Fault Relays – Two form‑C relay contacts (24V/1A) provide separate fault indication for output faults and input failover events.
-
Full Isolation – 1.5kV isolation protects sensitive control circuits from ground loops and transients.
-
Compact Design – 6HP width (1.5 slots) balances capacity and space efficiency for auxiliary racks.
Typical Application Cases
-
Redundant I/O Racks – Provides redundant power to auxiliary I/O racks in critical turbine control systems.
-
Satellite Cabinets – Powers remote I/O cabinets located near field devices.
-
Expansion Chassis – Supplies power to expansion racks added to existing Mark IV/V systems.
-
Offshore Platforms – Dual input capability supports connection to two independent battery banks.
Competitive Comparison
| Aspect | DS3800NRRA (GE) | DS3800NPSR1B1B (GE) | DS3800NPSE1E1G (GE) |
|---|---|---|---|
| Primary Output | +5V / 12A | +5V / 15A | +5V / 16A |
| Input Redundancy | Yes | Yes | No |
| Form Factor | 6HP (1.5 slots) | 6HP (1.5 slots) | 4HP (1 slot) |
| Price (refurb) | ~$3,800–$5,500 | ~$4,500–$6,500 | ~$3,800–$5,000 |
The DS3800NRRA is a compact redundant power solution for auxiliary I/O racks, offering dual input failover and individual output protection.
Selection Guidelines & Precautions
-
Application Verification – Designed for redundant I/O rack power. If redundancy is not required, NPSE boards are more cost‑effective.
-
Physical Compatibility – 6HP wide, requires 1.5 adjacent slots. Will not fit in 4HP slots.
-
Backplane Compatibility – Uses P1 and reinforced P2. If backplane lacks P2, redundancy unavailable.
-
Protection Thresholds – Adjust via onboard jumpers (JP1–JP3) based on load requirements.
-
Thermal Derating – Full output to 50°C; derate to 90% at 50–55°C, 80% at 55–60°C. Do not operate above 60°C.
-
Spare Sourcing – Production ended in 2015. Request test report verifying all outputs and failover. Inspect for capacitor bulging or discoloration.
A-B 1761-CBL-PM02
DELTA ŷ 2.5
п DB25
Reviews
There are no reviews yet.