IS200VAICH1C | New Surplus GE VAIC PCB

Description

Product Introduction (Anti-Template)

The jump from ‘B’ to ‘C’ on this versatile analog input board represents a significant architectural change—fully isolated inputs that eliminate ground loop issues and cross-channel interference. The IS200VAICH1C is the revision C variant of the VAIC series, designed for configurable analog input signals—voltage, current, thermocouples, and RTDs—with each channel galvanically isolated from the others. This board addresses the grounding problems that can plague analog measurements in complex plant environments.

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 analog readings. The board uses optical or transformer isolation on each channel with isolated signal conditioning for all input types. If your plant has grounding issues, multiple ground references, or you’re chasing unexplained analog offsets, the ‘C’ variant is the solution. This board is a drop-in replacement for the IS200VAICH1B, with no software changes required.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: IS200VAICH1B — 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: IS200VAICH1A — The ‘A’ revision. Direct hardware match. The ‘C’ is a major upgrade with channel isolation.

⚠️ Software Compatible: IS200TBCI1A — General-purpose analog I/O. No isolation. Requires external isolation and software reconfiguration.

⚠️ Software Compatible: IS200TBTCH1A — Thermocouple-specific board. No isolation. Requires software reconfiguration.

⚠️ Software Compatible: IS200TRTDH1D — Isolated RTD board. RTDs only. Requires software reconfiguration.

❌ 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 signal conditioning for all input types. If your plant has grounding issues, this eliminates those errors.

Q: Is the VAICH1C worth upgrading from the B revision?

A: If your plant has grounding issues, multiple ground references, or you’re chasing unexplained analog offsets, yes. The isolated inputs eliminate ground loop errors that can add significant error to readings. For clean, single-point grounding environments, the ‘B’ is sufficient.

Q: Can I replace a VAICH1B board with a VAICH1C without any changes?

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

Q: What types of signals can the ‘C’ handle?

A: The ‘C’ handles voltage inputs (0-10V, ±10V), current inputs (4-20mA), and temperature sensor inputs (thermocouples and RTDs) depending on jumper configuration—all with channel isolation.

Q: What bench testing should I do before installing a VAICH1C?

A: Standard analog input protocol with isolation verification. First, visual inspection—look for isolation components. Second, verify jumper settings. Third, apply known signals and verify measurement accuracy. Fourth, test isolation by applying common-mode voltage between channels and verifying no reading change.

Q: Is the VAICH1C hot-swappable?

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

Q: How do I verify I’m getting a genuine VAICH1C?

A: Look for the isolation components (optocouplers or transformers) on each channel. Weigh the board; should be about 365 grams. Look for the GE holographic security label.

Q: Where do I find the official wiring diagram for the VAICH1C?

A: GE document GEK-130560 covers the VAIC series. The ‘C’ has identical terminal assignments to the ‘B’ and ‘A’—the differences are internal isolation. Pay special attention to the jumper configuration table. Always cross-reference against your cabinet’s as-built drawings. Verify every channel before terminating.

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