IS200TTURH1C | New Surplus GE TTUR PCB

Description

Product Introduction (Anti-Template)

The jump from ‘B’ to ‘C’ on this universal temperature board represents a significant architectural change—fully isolated inputs that eliminate ground loop issues and cross-channel interference for both RTD and thermocouple sensors. The IS200TTURH1C is the revision C variant of the TTUR series, and it addresses the same grounding problems as the TRTDH1D, but for the universal board. This board supports both RTD and thermocouple sensors with jumper-configurable channels, with each channel galvanically isolated from the others.

What changed from ‘B’ to ‘C’? The ‘C’ revision adds galvanic isolation between each input channel and the board’s common ground, eliminating ground loop errors that can corrupt temperature readings. The board uses optical or transformer isolation on each channel with isolated excitation for RTD mode and isolated cold junction compensation for thermocouple mode. If your plant has grounding issues, multiple ground references, or you’re chasing unexplained temperature offsets on mixed sensor types, the ‘C’ variant is the solution. This board is a drop-in replacement for the IS200TTURH1B, with no software changes required.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: IS200TTURH1B — The immediate predecessor. Identical pinout, mounting, and software interface. The ‘C’ has fully isolated inputs for better noise immunity. No software changes required.

✅ Drop-in Replacement: IS200TTURH1A — The ‘A’ revision. Direct hardware match. The ‘C’ is a major upgrade with channel isolation.

⚠️ Software Compatible: IS200TRTDH1D — Dedicated isolated RTD board. RTDs only—no thermocouple capability. Requires software reconfiguration. Budget 2-4 hours.

⚠️ Software Compatible: IS200TBTCH1A — Dedicated thermocouple board. No RTD capability and no isolation. Requires software reconfiguration. Budget 2-4 hours.

⚠️ Software Compatible: IS200TBCI1A — General-purpose analog I/O board. Requires external conditioning and complete rework. Budget 8-12 hours.

❌ Hardware Incompatible: IS200TBQGH1A — Excitation termination board. Different pinout and application.

Frequently Asked Questions (FAQ)

Q: What makes the ‘C’ revision different from the ‘B’?

A: The ‘C’ adds galvanic isolation between each input channel and the board’s common ground, eliminating ground loop errors. Each channel has its own isolated excitation source (for RTD mode) and isolated cold junction compensation (for thermocouple mode). If your plant has grounding issues, this is the solution.

Q: Is the TTURH1C worth upgrading from the B revision?

A: If your plant has grounding issues, multiple ground references, or you’re chasing unexplained temperature offsets on mixed sensor types, yes. The isolated inputs eliminate ground loop errors that can add several degrees of error. If your plant has clean, single-point grounding, the ‘B’ revision may be sufficient.

Q: Can I replace a TTURH1B board with a TTURH1C without any changes?

A: Yes. The ‘C’ is a drop-in replacement. No software changes, no wiring changes, no configuration changes.

Q: What sensor types does the ‘C’ support?

A: The ‘C’ supports RTDs (Pt100, 3-wire) and thermocouples (J, K, and T types). Each channel is configured via jumpers.

Q: What bench testing should I do before installing a TTURH1C?

A: Standard temperature input protocol with isolation verification. First, visual inspection—look for isolation components. Second, verify jumper settings. Third, simulate temperatures for both RTD and thermocouple channels. Fourth, test isolation by applying common-mode voltage between channels and verifying no reading change.

Q: Is the TTURH1C hot-swappable?

A: We advise against hot-swapping temperature input boards. Power down the cabinet segment before swapping.

Q: How do I verify I’m getting a genuine TTURH1C?

A: Look for the isolation components (optocouplers or transformers) on each channel. Weigh the board; should be about 368 grams due to the additional isolation components. Look for the GE holographic security label.

Q: What’s the expected lifespan of the TTURH1C?

A: With proper cabinet cooling and clean power, these boards typically run 20+ years. The isolation components add complexity but also protect the board from ground-related faults.

Q: Where do I find the official wiring diagram for the TTURH1C?

A: GE document GEK-130554 covers the TTUR series. The ‘C’ has identical terminal assignments to the ‘B’ and ‘A’—the differences are internal isolation. Always cross-reference against your cabinet’s as-built drawings. Verify every channel before terminating.

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