DS200RTBAG2A | GE DS200 32-Channel Relay Output In Stock

Description

Product Core Brief

• Model: DS200RTBAG2A
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: High-density relay output termination board with 32 channels
• Product Type: Relay Output Board (Dual Bank)
• Key Specs: 32 Form C relays | 5 A contacts | Two isolated banks | Per-channel LED
• Condition: New Surplus.

Product Introduction

The DS200RTBAG2A is a high-density relay output termination board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides 32 independent Form C relay outputs arranged as two isolated banks of 16 relays each—double the channel density of the standard RTBAG1A.

The “2A” designation indicates a dual-bank board (two independent termination sections on one assembly). This is essentially two RTBAG1A boards integrated onto a single PCB, sharing a backplane connector but with bank-to-bank isolation. It is designed for applications requiring dense relay outputs: turbine auxiliary control (32 discrete outputs for pumps, valves, dampers), or when cabinet space is limited and two separate RTBA boards won’t fit.

Key Technical Specifications

Key Selling Points & Differentiators

• 32 relays in a single slot – Two independent banks of 16 relays. Replaces two RTBAG1A boards and saves a rack slot. Ideal for high-density turbine auxiliary control panels.
• Bank-to-bank isolation at 1500 VAC – Bank A and Bank B are electrically isolated. Connect Bank A relays to 24 VDC control circuits and Bank B relays to 120 VAC motor starters on the same board. No ground loops, no isolation concerns.
• Independent ribbon cables per bank – Use two separate output modules (e.g., two DS200DACBG modules) to control each bank independently. Or use a single 64-pin backplane connection with the included bank select jumpers (routes signals to appropriate bank).
• Removable terminal blocks on all 96 terminals – 32 relays x 3 terminals each = 96 field wiring points. Each bank’s terminal blocks are color-coded (Bank A: gray, Bank B: black). Replace a damaged block without unwiring the entire board.
• Per-channel LED for visual status – Red LED per relay lights when the output module energizes the coil. Instant confirmation without a meter.
• Flyback diode protection on every coil – Suppresses voltage spikes from inductive load switching. Protects Mark V output modules.
• QC includes 100-cycle test on all 32 relays – Every relay cycled 100 times on the test rack. Contact resistance measured before and after (<100 mΩ). Bank-to-bank isolation verified at 1800 VAC.
• 2-year warranty – Covers contact welding, coil failure, LED failure, or any manufacturing defect on either bank.

Frequently Asked Questions (FAQ)

Q: What’s the difference between RTBAG1A and RTBAG2A?

The 2A has double the channel density. Choose 2A when you need 32 outputs in one rack slot.

Q: Can I replace two RTBAG1A boards with one RTBAG2A without changing my Mark V configuration?
A: Yes, with wiring changes. The RTBAG2A has 32 relays (1–32). Two RTBAG1A boards have relays 1–16 on the first board and 1–16 on the second board (duplicate numbering). You will need to renumber your field devices and re-land wires onto the RTBAG2A terminals (1–32 sequential). The control logic (output module mapping) also changes—you will need to reprogram which output bits go to which relays. Allow 4–6 hours for re-termination and logic changes.

Q: How do I connect the RTBAG2A to my Mark V output modules?
A: Two methods. Method 1 (recommended): Use two separate output modules. Connect Bank A (relays 1–16) to output module #1 via the included 64-pin ribbon cable. Connect Bank B (relays 17–32) to output module #2 via the second ribbon cable. Method 2: Use one output module (64 outputs) and install the bank select jumpers (included). The jumpers map outputs 1–16 to Bank A relays 1–16, and outputs 17–32 to Bank B relays 17–32. Jumper settings are documented on the board silkscreen.

Q: Can Bank A and Bank B operate at different field voltages?
A: Yes—that’s the purpose of bank isolation. Bank A relays can switch 24 VDC while Bank B relays switch 120 VAC on the same board. The coils (24 VDC) are common across both banks; only the contact circuits are isolated. Do NOT mix voltage types within the same bank (e.g., relay 1 at 24 VDC, relay 2 at 120 VAC in Bank A). They share a common isolation barrier per bank.

Q: The board has 96 terminal positions. Are they all accessible with the board mounted?
A: Yes. The terminal blocks are arranged along the bottom edge of the board (for ribbon cable access from the top). With the board mounted on DIN rail, you have full access to all 32 removable terminal blocks. Keep 100 mm clearance below the board for wiring access. Do not mount the board in a location where cables route directly underneath—you need room to plug/unplug terminal blocks.

Q: What is the maximum current draw from the backplane for the coils?
A: 480 mA at 24 VDC with all 32 relays energized (32 x 15 mA). Mark V power supplies (DS200PCCAG series) typically provide 5 A on the 24 VDC rail. The RTBAG2A draws 0.48 A, leaving plenty of capacity. However, add up all other modules (CPU, I/O, comms) to ensure you don’t exceed the power supply rating. We provide a load calculation worksheet.

Q: Can I replace individual relays on the RTBAG2A?
A: Yes. The relays are through-hole soldered, not socketed. Replacement requires desoldering 8 pins per relay. We offer relay replacement service ($18 per relay + return shipping). The RTBAG2A uses the same relays as the RTBAG1A. Keep a few spares on hand. For high-reliability applications, we recommend the RTBAG2ABB (gold-flashed contacts, sealed relays, same 32-channel density—special order, contact us).

Q: What QC tests do you run on the RTBAG2A?
A: Ten tests, all documented:

1. Visual: 20x magnification, especially bank isolation areas.
2. Coil resistance per relay: 1.6 kΩ ±5% (sample of 8 per bank).
3. Coil current: 15 mA ±2 mA at 24 VDC (sample).
4. Contact resistance (NO and NC): Four-wire measurement at 100 mA. <50 mΩ.
5. Bank-to-bank isolation: 1800 VAC for 5 seconds between Bank A and Bank B terminals. Leakage <0.5 mA.
6. Coil-to-contacts isolation per bank: 1800 VAC for 5 seconds. Leakage <0.5 mA.
7. Operate test: Cycle each relay 100 times at 1 Hz. Monitor contact closure. No failures.
8. Load test (sample of 8 relays): 5 A resistive at 30 VDC, 10,000 cycles. Contact resistance after test <100 mΩ.
9. Ribbon cable test: Both 64-pin cables tested for continuity and shorts.
10. LED test per relay: Verify red LED illuminates at 24 VDC coil energization.
11. Bank select jumper test: Verify mapping of output bits to correct bank (two configurations tested).

Q: What shipping protection for this large board?
A: The RTBAG2A is 350 mm x 200 mm—significantly larger than single-bank boards. Anti-static bag first, then custom foam cradle with cutouts for all 32 removable terminal blocks. The terminal blocks are shipped installed to protect the pin headers. Double-wall box with “FRAGILE,” “ESD SENSITIVE,” and “DO NOT STACK” labels. Each board ships individually. Accessories (spare terminal blocks, jumpers, labels) in separate small bag inside the same box. The board weight is 1.6 kg (3.5 lbs).

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