IS200VAOCH1C | New Surplus GE VAOC PCB

Description

Product Introduction (Anti-Template)

The jump from ‘B’ to ‘C’ on this versatile analog output board represents a significant architectural change—fully isolated outputs that eliminate ground loop issues and cross-channel interference on control signals. The IS200VAOCH1C is the revision C variant of the VAOC series, designed for configurable analog output signals—voltage or current—with each channel galvanically isolated from the others. This board addresses the grounding problems that can affect analog control signals in complex plant environments.

What changed from ‘B’ to ‘C’? The ‘C’ revision adds galvanic isolation between each output channel and the board’s common ground, eliminating ground loop errors that can affect actuator control signals. The board uses optical or transformer isolation on each channel with isolated power supplies for each output. If your plant has grounding issues that affect analog control signals, the ‘C’ variant is the solution. This board is a drop-in replacement for the IS200VAOCH1B, with no software changes required.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: IS200VAOCH1B — The immediate predecessor. Identical pinout, mounting, and software interface. The ‘C’ has fully isolated outputs. No software changes required.

✅ Drop-in Replacement: IS200VAOCH1A — 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: IS200TSVOH1C — Servo output board. Different signal type. 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 output channel and the board’s common ground, eliminating ground loop errors that can affect actuator control signals. Each channel has its own isolated power supply.

Q: Is the VAOCH1C worth upgrading from the B revision?

A: If your plant has grounding issues that affect analog control signals, yes. The isolated outputs eliminate ground loop errors that can cause actuator instability. For clean, single-point grounding environments, the ‘B’ is sufficient.

Q: Can I replace a VAOCH1B board with a VAOCH1C 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’ generate?

A: The ‘C’ can be configured for voltage outputs (0-10V) or current outputs (4-20mA) depending on jumper configuration—all with channel isolation.

Q: What bench testing should I do before installing a VAOCH1C?

A: Standard isolated analog output protocol. First, visual inspection—look for isolation components. Second, verify jumper settings. Third, apply power and verify output signal ranges. Fourth, test isolation by applying common-mode voltage between channels and verifying no effect on outputs.

Q: Is the VAOCH1C hot-swappable?

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

Q: How do I verify I’m getting a genuine VAOCH1C?

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 VAOCH1C?

A: GE document GEK-130570 covers the VAOC 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.

DS200DENQF1ADB SOFTWARE PROM SET
DS200DENQF1BCB SOFTWARE PROM SET
DS200DENQF1BDB SOFTWARE PROM SET