DS200TCRAG2A | GE Mark VI Output Board

Description

Product Introduction (Anti-Template)

The DS200TCRAG2A is the answer to a specific problem: you have many relay loads to control and limited rack space. This board packs 16 relay outputs into one VME slot—double the channel count of the TCRAG1A, with Form C contacts and diagnostic LEDs per channel.

The ‘2’ in the part number tells you this is the high-density variant in the TCRAG family. Compared to the TCRAG1A (8 outputs, 5A), the TCRAG2A gives you twice the channels with the same 5A current rating. The relays are field-replaceable (plug-in type) and each channel has a diagnostic LED showing ON/OFF/FAULT status. If you have 10-16 relay loads and you’re running out of rack slots, this board solves the problem.

Key Technical Specifications

Compatible Replacement Models

Replacement options depend on your channel count and relay requirements.

✅ Drop-in Replacement: The DS200TCRAG2 (no ‘A’) is a direct drop-in with identical 16 relay outputs, but without diagnostic LEDs and with a slower update rate. If you don’t need diagnostics, the base model is a cheaper option (typically 20-30% less). The ‘A’ is the enhanced version.

⚠️ Software Compatible: The DS200TCRAG1A (8 outputs, 5A) provides half the channels with the same current capacity. Only use if you need 5A and can reduce channel count.

⚠️ Software Compatible: The DS200TCQEG1A (16 solid-state outputs, 5A) provides solid-state outputs with no contact wear. Only use if you need solid-state reliability.

❌ Hardware Incompatible: Any analog output board (TCDAG1 series) or discrete input board (TCQAF1 series) uses different backplane pins and is not suitable for outputs.

Frequently Asked Questions (FAQ)

What’s the difference between the TCRAG2A and the TCRAG1A?

The TCRAG1A has 8 outputs at 5A. The TCRAG2A has 16 outputs at 5A—double the channel count with the same current rating. The TCRAG2A uses a larger board footprint to accommodate the additional relays.

What type of relays does this board use?

The TCRAG2A uses Form C relays—each output has a normally open (NO) and normally closed (NC) contact. The relays are field-replaceable (plug-in type). Each output is rated for 5A at 250VAC or 5A at 30VDC.

Can I use this board with a Mark VIe controller?

No—the TCRAG2A uses the older Mark VI backplane pinout. Mark VIe uses a different assignment and typically uses the IS200TCRAG2A for high-density relay outputs. Use the Mark VIe-specific board for new installations.

How do I test this board before installation?

Testing the TCRAG2A requires checking all 16 outputs:

1. Visual inspection: Check for burnt components. Look for diagnostic LEDs and relay wear.
2. Power-up test: Apply power. All diagnostic LEDs should briefly flash during POST.
3. Firmware check: Read firmware via ToolboxST—should be 3.0 or later.
4. Output test: Command output 1 ON—verify relay closes and LED illuminates green. Measure continuity across contacts—should be <0.1Ω. Command OFF—verify relay opens and LED turns amber. Repeat for outputs 1-16.
5. Contact resistance test: Measure contact resistance of each relay—should be <0.1Ω for new relays.
6. Update rate test: Verify the board updates at 5ms intervals.
7. Isolation test: Measure resistance between output channels—should be >10MΩ.

What’s the most common failure on this board?

Two issues specific to the relay output design:

1. Relay contact wear. The relay contacts can wear out over time, especially if switching inductive loads. Symptom: output doesn’t close or exhibits high contact resistance.
2. Diagnostic LED failure. The LEDs can fail after 10+ years—a failed LED doesn’t affect the output.

If I’m using this board in a SIL-rated safety application, what’s the recommended maintenance interval?

The relay outputs make this board suitable for SIL-1 and SIL-2 applications (not SIL-3). We recommend:

• Visual inspection: Every 6 months (check diagnostic LEDs and relay contacts)
• Power-up test: Every 12 months
• Output test: Every 12 months (verify relay operation and contact resistance)
• Isolation check: Every 2 years
• Full calibration: Every 5 years

What’s the lead time for a replacement TCRAG2A?

These boards are less common than the TCRAG1A:

• New surplus: 3-6 weeks.
• Refurbished: 2-3 weeks. Ensure the refurbisher tests all 16 relays.
• Used/as-is: High risk—the relays are wear items.

Is there a direct Mark VIe equivalent?

Yes—the IS200TCRAG2A (Mark VIe version). The backplane pinout is different.

What termination board should I use with the TCRAG2A?

The TCRAG2A is designed to interface with a termination board that supports relay outputs. The DS200TBQAG2A (high-density high-current termination) or DS200TBPXG2A (high-density mixed-signal termination) can be used. The termination board provides the terminal connections for the field wiring.

What’s the update rate for this board?

The TCRAG2A updates all 16 channels simultaneously at 5ms intervals—200Hz update rate.

What’s the maximum load for the relay outputs?

The relay outputs are rated for 5A at 250VAC or 5A at 30VDC. For inductive loads (solenoids, contactors), derate to 2A or use an external snubber circuit to protect the relay contacts. The relays are field-replaceable—keep spare relays in your maintenance kit.

Can I replace the relays in the field?

Yes—the relays are plug-in type (socketed). You can replace a failed relay without soldering. However, the board must be powered down before replacing relays. Keep spare relays (the correct type and rating) in your maintenance kit. The relay part number is typically printed on the relay body—order the same type.

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