DS200TCPDG1B | GE Mark VI I/O Board

Description

Product Introduction (Anti-Template)

The DS200TCPDG1B is the most advanced programmable combined I/O board GE produced for the Mark VI system—the board that adds HART communication and galvanic isolation to the flexible TCPDG1 platform. This board combines 4 programmable analog inputs with 4 programmable analog outputs (with HART on the outputs) in one VME slot, with reinforced isolation (1800Vrms), extended temperature operation (-20°C to +70°C), advanced diagnostics, and significantly improved accuracy.

The ‘TCPD’ in the part number indicates this is a programmable combined I/O board. The ‘B’ suffix tells you this is the enhanced version: 16-bit resolution on both inputs and outputs, ±0.04% input accuracy, ±0.08% output accuracy, galvanically isolated HART on outputs, reinforced isolation, extended temperature range, and advanced diagnostics. Compared to the TCPDG1A (15-bit outputs, ±0.05% inputs, ±0.10% outputs, no HART), the ‘B’ gives you significant upgrades in every dimension. If you have a compact skid with mixed sensors and actuators, and you need HART communication on your outputs, this board is the solution.

Key Technical Specifications

Compatible Replacement Models

Replacement options depend on your need for HART, galvanic isolation, and accuracy.

✅ Drop-in Replacement: The DS200TCPDG1A (no ‘B’) is a direct electrical drop-in—same pinout, same 4 inputs, same 4 outputs, same programmable ranges. The differences: the ‘A’ has 15-bit outputs, ±0.05% inputs, ±0.10% outputs, no HART, standard isolation (1500Vrms), standard temperature range (0-60°C), no diagnostic LEDs. If you don’t need HART and galvanic isolation, the ‘A’ is a cheaper option (typically 30-40% less). The ‘B’ is the ultimate version.

⚠️ Software Compatible: The DS200TCPAG1A (4 inputs only) provides inputs only—no outputs.

⚠️ Software Compatible: The DS200TCDAG1B (4 outputs, HART, 16-bit) provides outputs only—no inputs.

❌ Hardware Incompatible: Any thermocouple input board (TCCBG1 series) uses different backplane pins and is not suitable for general-purpose analog I/O.

Frequently Asked Questions (FAQ)

What does the ‘B’ suffix mean on this programmable combined I/O board?

The ‘B’ revision is a major upgrade over the ‘A’ version. It adds:

• True 16-bit resolution on outputs (vs. 15-bit effective)
• Galvanically isolated HART on outputs with 1800Vrms isolation
• Improved input accuracy (±0.04% vs. ±0.05%)
• Improved output accuracy (±0.08% vs. ±0.10%)
• Reinforced isolation (1800Vrms vs. 1500Vrms)
• Extended temperature range (-20°C to +70°C vs. 0-60°C)
• Faster update rate (10ms vs. 20ms)
• Diagnostic LEDs (including blue HART indicator)

How does HART work on this board?

HART communication is available on the 4 output channels only. The inputs do not support HART. The HART modems are galvanically isolated from the analog output circuits (1800Vrms isolation), preventing ground loops from affecting HART communication or the analog signal. Each output channel has a blue LED that illuminates when HART communication is active.

Can I use this board with a Mark VIe controller?

No—the TCPDG1B uses the older Mark VI backplane pinout. Mark VIe uses a different assignment and typically uses the IS200TCPDG1B for programmable combined I/O. Use the Mark VIe-specific board for new installations.

How do I test this board before installation?

Testing the TCPDG1B requires checking both inputs and outputs with different ranges and HART functionality:

1. Visual inspection: Check for burnt components. Look for diagnostic LEDs, HART modem ICs, and galvanic isolation components.
2. Power-up test: Apply power. All diagnostic LEDs should cycle during POST.
3. Firmware check: Read firmware via ToolboxST—should be 4.0 or later.
4. Input configuration test: Configure channel 1 for 0-10V. Apply 5.00V—read 5.000V ± 0.002V (0.04%). Test at 0V, 5V, 10V.
5. Input – ±10V: Configure channel 2 for ±10V. Apply -5.00V—read -5.000V ± 0.002V.
6. Input – 4-20mA: Configure channel 3 for 4-20mA. Apply 12.00mA—read 12.00mA ± 0.0048mA.
7. Output configuration test: Configure output 1 for 0-10V. Command 5.00V—measure 5.000V ± 0.004V (0.08%). Test at 0V, 5V, 10V.
8. Output – 4-20mA: Configure output 2 for 4-20mA. Command 12.00mA, connect 250Ω resistor—measure 3.000V ± 0.0024V.
9. HART test: Connect a HART device to output 1. Verify communication. Blue LED should illuminate.
10. Galvanic isolation test: Measure resistance between HART and analog circuits—should be >20MΩ.
11. Diagnostic LED test: Disconnect an input signal—LED should flash amber or red.
12. Isolation test: Apply 1800Vrms for 1 minute.
13. Temperature test: Cycle from -20°C to +70°C—verify accuracy stays within spec.

What’s the most common failure on the ‘B’ revision?

1. Configuration memory corruption. The non-volatile memory that stores channel configurations can become corrupted.
2. Galvanic isolation component failure. HART communication fails while analog output works.
3. Diagnostic LED failure. Visual indication lost.

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

The improved accuracy, galvanic isolation, and reinforced isolation make this board suitable for SIL-2 applications (not SIL-3). We recommend:

• Visual inspection: Every 3 months (check diagnostic LEDs)
• Power-up test: Every 6 months
• Configuration check: Every 12 months
• Input accuracy check: Every 6 months (0.04% spec)
• Output accuracy check: Every 6 months (0.08% spec)
• Galvanic isolation check: Every 12 months
• HART test: Every 12 months
• Isolation check: Every 2 years
• Full calibration: Every 5 years

What’s the lead time for a replacement TCPDG1B?

These are the most advanced programmable combined I/O boards:

• New surplus: 4-8 weeks. The ‘B’ commands a premium—expect 35-45% above the TCPDG1A.
• Refurbished: 2-4 weeks. Requires specialized calibration equipment.
• Used/as-is: High risk—used boards are rarely in spec.

Is there a direct Mark VIe equivalent?

Yes—the IS200TCPDG1B (Mark VIe version). The backplane pinout is different.

What termination board should I use with the TCPDG1B?

The TCPDG1B interfaces with the DS200TBCAG1A (general-purpose analog termination) or the DS200TBPAG1A (mixed-signal termination). The termination board must support both inputs and outputs.

What’s the update rate for this board?

The TCPDG1B updates all 8 channels simultaneously at 10ms intervals—100Hz update rate. This is twice as fast as the ‘A’ version (20ms).

What’s the difference between the ‘B’ and the ‘A’ in terms of HART isolation?

• ‘A’ version: No HART support.
• ‘B’ version: Galvanically isolated HART (1800Vrms HART-to-analog isolation).

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