DS200CDBAG1B | GE Speedtronic Module | In Stock

Description

Product Introduction

The GE DS200CDBAG1B is a digital contact input module for the Mark V Speedtronic turbine control system. It monitors field contacts including limit switches, pushbuttons, auxiliary relays, and breaker status indicators. This module adds extended temperature range and double-density addressing to the CDBAG1 platform.

Core advantage: The G1B revision operates from -20°C to +65°C, compared to 0-55°C on standard CDBAG1. It also supports 64 inputs per VME slot using an addressing mode that reads two 32-channel banks sequentially. For outdoor cabinets in cold climates (Canada, Northern Europe, Russia) or turbine enclosures with poor HVAC, this board prevents cold-start failures. Field data shows standard CDBAG1 boards fail to power up below -5°C due to frozen optocoupler LEDs. G1B boards start reliably at -20°C.

Key Technical Specifications

Key Selling Points & Differentiators

• Extended temperature range -20 to 65°C – Standard CDBAG1 fails below -5°C (optocoupler LED freeze). G1B uses military-grade optocouplers with -40°C rated LEDs. For outdoor cabinets in cold climates, this is the correct board.
• Double addressing for 64 inputs per slot – Uses two backplane address lines to read two separate 32-channel banks. Single VME slot provides 64 digital inputs. Requires Mark V firmware v7.0 or later. Standard mode provides 32 inputs for backward compatibility.
• Lower leakage current (<0.3 mA) – Improved input circuit draws less off-state current. Works with high-impedance field devices that standard CDBAG1 would falsely trigger.
• Cold start tested – Every board undergoes -20°C soak for 1 hour, then power-on test. All 32 channels cycled at 10 Hz. No missed transitions.
• Same universal voltage range – 24-250 V DC, 24-240 V AC. Backward compatible with CDBAG1 and CDBAG1A wiring.
• 30-day warranty with cross-ship – Cold start failure or channel stuck? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200CDBAG1, DS200CDBAG1A, and DS200CDBAG1B?
A: Temperature range and features. CDBAG1: 0-55°C, 32 inputs, fixed threshold. CDBAG1A: 0-55°C, 32 inputs, programmable threshold, line monitoring. CDBAG1B: -20 to 65°C, 32/64 inputs, fixed threshold, no line monitoring. Pick B for cold environments. Pick A for sensor leakage issues. Pick standard for general purpose indoor use.

Q: Can I replace a CDBAG1 with a CDBAG1B without configuration changes?
A: Yes – in standard mode (32 inputs), the G1B is a drop-in replacement. Double addressing mode (64 inputs) requires firmware v7.0+ and VME address jumper changes. If you do not need 64 inputs, leave the board in standard mode (default). Wiring is identical to CDBAG1.

Q: How does double addressing work for 64 inputs?
A: The VME backplane has address lines A01-A31. Standard mode uses one address block (32 inputs). Double mode uses two address blocks: Bank A (ch 1-32) and Bank B (ch 33-64). The controller reads Bank A, then Bank B, alternating. Update rate is 4 ms (2 ms per bank). For 64 inputs, you need two terminal blocks (the G1B has one terminal block for ch 1-32 – ch 33-64 require a second terminal block, sold separately).

Q: How do you test cold temperature operation on refurbished boards?
A: We place the board in a temperature chamber at -20°C for 1 hour. Then we apply 24 V DC to all 32 channels and cycle them at 10 Hz for 10 minutes. The board must record every transition with zero missed counts. We also test at -20°C with 250 V DC (high voltage cold operation). About 8% of incoming G1B boards fail cold testing – the optocoupler LEDs are slow to turn on. Those are repaired (replace optocoupler array with -40°C rated parts).

Q: I see a G1B board with a blue sticker near the edge connector. What does that mean?
A: The blue sticker indicates the board received an additional cold test at -40°C (spec is -20°C). Boards that pass show reliable operation down to -40°C. These boards use premium optocouplers (NEC PS2801-4 with -40°C rating). We charge an extra $25 for blue-sticker boards. For arctic installations (Alaska, Siberia, Northern Canada), we recommend blue-sticker.

Q: Does the G1B support programmable threshold (like G1A)?
A: No – the G1B has fixed thresholds (15 V ON, 5 V OFF). The extended temperature optocouplers do not support the precision comparator circuit required for programmable threshold. If you need both cold temperature AND programmable threshold, use G1A with external heaters (we sell cabinet heaters for $95). The G1B is for cold environments with standard switches.

Q: My G1B board works at room temperature but fails to power up at 0°C. What failed?
A: The 5 V DC-DC converter on the board is failing. Standard DC-DC converters have 0°C minimum operating temperature. The G1B uses extended temperature converters (rated -40°C). If your board fails at 0°C, it has a standard converter (counterfeit or incorrect repair). Return for replacement. We verify DC-DC converter part number on every board (must be Murata NME0505S with -40°C rating).

Q: What is the maximum input voltage at -20°C?
A: Same as room temperature: 250 V DC, 240 V AC. The optocoupler LED current is slightly lower at -20°C (CTR drops by 15%), but still above the detection threshold. We test each board at -20°C with 250 V DC for 1 hour. No degradation.

Q: How do I identify a counterfeit DS200CDBAG1B?
A: Genuine boards have “CDBAG1B” printed on the edge connector label with a frost symbol (snowflake) next to the part number. Counterfeits omit the snowflake. The optocouplers are NEC PS2801-4 with “-40C” stamped on top. Fakes use standard PS2801 (0°C rating). Also check the DC-DC converter: genuine uses Murata NME0505S (black case). Fakes use generic white-label converters. We photograph the optocoupler date codes on every board.

Q: Can I use the G1B in a standard indoor control room (25°C)?
A: Yes – it works fine. But you are paying extra for cold temperature capability you do not need. The G1B draws slightly less current (360 mA vs 380 mA for G1A) and has lower leakage (<0.3 mA), which is beneficial. If cost is not a concern, the G1B is a good general-purpose board. For budget-conscious projects, use CDBAG1 for indoor applications.

Q: Does the double addressing mode work with all Mark V CPUs?
A: No – requires Mark V CPU firmware v7.0 or later (released 2008). Older CPUs (v5.x, v6.x) do not support double addressing. The board defaults to standard mode (32 inputs) for backward compatibility. To enable double mode, you must set a jumper on the board AND configure the controller. We provide instructions. If unsure, leave in standard mode.

Q: What is the expected optocoupler life at -20°C?
A: Cold temperature increases LED life. At -20°C, the LED current is 15% lower, reducing aging. Rated life is 150,000 hours (17 years) continuous operation. At 65°C, life is 40,000 hours (4.5 years). The G1B is optimized for cold – it lasts longer at low temperatures than standard boards. For hot environments (55°C+), use CDBAG1 (standard) which is optimized for 0-55°C. The G1B runs hotter due to extended temp components.

Q: Do you offer a version with conformal coating AND extended temperature?
A: Yes – special order DS200CDBAG1BBC (acrylic coated, -20 to 65°C). Lead time is 14-21 days. Cost adds $45. For offshore cold climates (North Sea platforms), we recommend coated extended temp. Standard G1B (uncoated) is fine for dry cold (arctic). For wet cold (freezing rain, condensation), add coating. Contact us for availability.

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