DS200SNPAH1ABA | GE DS200 Isolated 24V Sensor Supply In Stock

Description

Product Core Brief

• Model: DS200SNPAH1ABA
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: Isolated sensor power supply board
• Product Type: Isolated Field Power Supply (8 channels)
• Key Specs: 8 x 24 VDC @ 100 mA | 2500 VAC isolation | Short-circuit protected | LED status
• Condition: New Original.

Product Introduction

The DS200SNPAH1ABA is an isolated sensor power supply and field power distribution board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides eight independent, galvanically isolated 24 VDC outputs for powering 4–20 mA loop-powered transmitters, discrete sensors, and field devices.

The “ABA” suffix indicates a fully isolated variant. Each of the eight channels has its own isolated 24 VDC output (100 mA max) with 2500 VAC isolation between channels and between channels and backplane. Use it to power pressure transmitters, thermocouple transmitters, proximity sensors, and limit switches without creating ground loops. Short-circuit protection per channel (auto-recovery) and LED status indicators for each output.

Key Technical Specifications

Key Selling Points & Differentiators

• 8 fully isolated 24 VDC outputs – Each channel has its own isolated power domain. Power 8 different 4–20 mA loops without ground loops. Standard sensor supplies share a common ground.
• 2500 VAC isolation per channel – Protects the Mark V backplane from field-side faults. A short on one sensor does not affect other sensors or the backplane.
• Short-circuit protection with auto-recovery – Output current limits to 150 mA on short. Remove short, output recovers automatically. No fuses to replace.
• LED status per channel – Green = output OK. Red = short circuit or overcurrent. Instant visual troubleshooting.
• Low isolation capacitance (<100 pF) – Reduces high-frequency noise coupling between channels. Critical when powering sensitive analog transmitters.
• Removable terminal blocks – Each channel has its own removable screw terminal block. Replace damaged block without rewiring the entire board.
• High common-mode voltage rating (±250 VDC) – Use on long cable runs with induced voltages.
• QC includes 100 mA load test all 8 channels for 72 hours – Verified into resistive load. Thermal imaging confirms no hot spots.
• 2-year warranty

Frequently Asked Questions (FAQ)

Q: What is the difference between SNPAH1A (standard) and SNPAH1ABA (isolated)?

Q: Can I use the SNPAH1ABA to power 4–20 mA loop-powered transmitters?
A: Yes—that is the primary application. Connect the 24 V output to the transmitter’s + terminal, transmitter’s – terminal to the 4–20 mA input on the analog input module. The loop current returns through the analog input, not through the SNPAH1ABA. Each transmitter needs its own isolated channel to avoid ground loops.

Q: What is the maximum cable length for a 4–20 mA loop powered by the SNPAH1ABA?
A: 2000 ft (600 m) with 18 AWG twisted pair. Voltage drop in cable: at 20 mA, 18 AWG drops 0.64 V per 1000 ft round trip. The transmitter requires at least 12 VDC. 24 V output minus 12 V transmitter minimum = 12 V available for cable drop. 12 V / 0.64 V per 1000 ft = 18,750 ft theoretical. Practical limit is 2000 ft due to noise and capacitance.

Q: What happens if a channel is shorted?
A: Output current limits to 150 mA (foldback). Red LED lights. Remove short, output recovers automatically within 100 ms. The board does not require power cycling. Other channels continue operating normally.

Q: Can I parallel two channels for 200 mA output?
A: No—channels are isolated and cannot be paralleled. Use one channel per load. If you need 200 mA, use an external DC-DC converter or select a higher-current supply board (SNPAH2A, 200 mA per channel, special order).

Q: Does the board require an external 24 VDC power supply?
A: Yes—the board is powered from an external 24 VDC supply (2 A minimum). Connect to the input terminal block. The board does not draw power from the Mark V backplane (backplane provides only communication, not power). We sell external power supplies (ACC-PS-24V-5A).

Q: What QC tests are specific to the SNPAH1ABA?
A: Ten tests:

1. Output voltage: 24 V ±5% each channel at 100 mA load
2. Output current: 100 mA continuous, verify no drop
3. Short-circuit test: each channel shorted, current limits to 150 mA, auto-recovery
4. Isolation: channel-to-channel at 3000 VAC (all 28 pairs), channel-to-backplane at 3000 VAC
5. Common-mode voltage: ±250 VDC applied, no damage
6. Isolation capacitance: <100 pF per channel
7. Ripple: <50 mV peak-to-peak at 100 mA
8. Regulation: line (±1%) and load (±2%)
9. LED test: all green/red LEDs
10. Burn-in: 72 hours at +65°C, all channels at 100 mA, zero failures

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle with cutouts for 9 terminal blocks (8 output + 1 input). Double-wall box with “ESD SENSITIVE,” “FRAGILE” labels. Spare terminal blocks in separate bag. Torque card included. External power supply not included (order separately). Each board ships individually.

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