IS200WROBH1A | Mark VIe Digital Output Relay | New Surplus

Description

Product Introduction

The GE IS200WROBH1A is a VMEbus relay output board from the Mark VIe Speedtronic series, purpose-built for high-density, isolated digital output control in turbine applications. This board provides dry contact relay outputs for controlling field devices such as solenoid valves, motor starters, alarms, and annunciators—critical for turbine sequencing, protection, and operator indication.

What sets the H1A revision apart is its 16-channel capacity with fully isolated form C (SPDT) relay contacts, status feedback monitoring, and comprehensive protection features. Each relay is rated for 250 VAC/2 A or 30 VDC/2 A, making them suitable for direct control of a wide range of field devices. The board includes coil status monitoring to verify that the commanded output state was achieved, and diagnostic read-back for rapid troubleshooting. For system integrators requiring high-density, reliable relay output capability for turbine control and protection systems, this board is the direct OEM solution.

Key Technical Specifications

Key Selling Points & Differentiators

• High Channel Density: 16 relay outputs on a single VME slot—reduces chassis space requirements and system cost.
• Form C Contacts: Each channel provides both NO and NC contacts—flexible for a wide range of control applications (energize-to-trip or energize-to-run).
• Full Optical Isolation: 2,500 VDC isolation between the backplane and field contacts—protects the control system from field wiring faults.
• Status Monitoring: Per-channel coil status read-back verifies the commanded output state—critical for diagnostic and safety applications.
• Long Contact Life: 100,000 cycles at rated load—reduces maintenance frequency in high-cycle applications.
• Fast Response: <10 ms turn-on, <5 ms turn-off—suitable for most protection and sequencing applications.
• Live Test Verified: Every board undergoes a 48-hour burn-in with all 16 channels cycled under rated load. We log contact resistance, response time, and status monitoring accuracy.
• 90-Day Warranty: Covers functional defects. If it fails under normal operating conditions, we replace it. No restocking fee for verified returns.
• OEM Traceability: All units come from audited surplus channels with original GE anti-static bags and serialized labels. No clones, no pull-and-refurbish from unknown sources.
• Configuration Backup Service (Free): Upon request, we extract and archive your existing board’s firmware version and configuration before shipment.

Frequently Asked Questions (FAQ)

Q: What is the difference between IS200WROBH1A and earlier WROB variants?

A: The H1A revision has improved contact life (100,000 cycles vs. 50,000 cycles), faster response time (<10 ms vs. <15 ms), and enhanced status monitoring. The H1A also has better surge withstand capability. If you need longer contact life or faster response, the H1A is recommended. For basic applications, earlier variants may be sufficient.

Q: What is a form C relay and why is it useful?

A: Form C (SPDT) relays provide both normally open (NO) and normally closed (NC) contacts. This allows you to configure outputs for either energize-to-trip (using NO contacts) or energize-to-run (using NC contacts) without changing hardware. This flexibility is particularly useful for turbine protection logic where fail-safe operation is required.

Q: Can I use this board to directly control solenoid valves?

A: Yes—with a caveat. The relays are rated for 2 A at 30 VDC or 2 A at 250 VAC. For small solenoid valves within this current rating, direct control is possible. For larger solenoids or inductive loads, we recommend using an interposing relay or contactor to protect the board from back-EMF and inrush current. Always install a suppression diode across DC coils or an RC snubber across AC coils to protect the relay contacts.

Q: Is this board hot-swappable?

A: No. The Mark VIe VME backplane does not support live insertion. You must de-energize the rack, ground yourself, and wait 30 seconds for bulk capacitors to discharge. We’ve seen field crews pull a WROB while the cabinet was still powered—it damaged the relay driver circuits and the backplane connector. Don’t risk it.

Q: How do I know if a relay output is faulty?

A: The WROBH1A provides per-channel coil status read-back. If the commanded state does not match the actual coil state, the board flags a fault. You can monitor this through the Mark VIe Toolkit. Common causes: failed relay coil, driver circuit failure, or backplane power issue. We recommend periodic self-test cycles to verify relay operation.

Q: What is the status monitoring feature?

A: The WROBH1A reads back the actual coil status and compares it to the commanded state. If the coil does not energize or de-energize as commanded, the board reports a fault. This is critical for safety applications where you need to verify that the output achieved the desired state.

Q: What is the difference between IS200WROBH1A and IS200WROBH1B?

A: The H1B revision typically includes enhanced diagnostics or minor performance improvements. The H1A is the base revision. Check your existing board—if you have H1B, verify compatibility. In most cases, H1A and H1B are interchangeable, but confirm with the board’s firmware requirements.

Q: What is the typical lead time for this part?

A: We stock these on the shelf—usually ship within 24 hours of order placement and payment confirmation. For international orders, add 3–5 days for customs. If you need expedited (overnight air), we can do that, but you’ll need to coordinate with our logistics team for the cut-off time.

Q: Does this board work with the newer Mark VIeS (SIL-rated) cabinets?

A: To be direct: no. The IS200WROBH1A is not SIL-certified. It’s meant for standard Mark VIe industrial control. The SIL-rated systems use the IS220WROB (with additional redundancy, diagnostic coverage, and separate safety shutdown path). Mixing them violates your site’s safety integrity level. If you’re in a SIL environment, we can source the correct variant but it will have a different model number.

Q: What’s your return policy if this doesn’t solve my relay output issue?

A: If the board is electrically functional (passes our QC test) but doesn’t correct your fault, we’ll accept a return within 30 days provided the board shows no physical damage and the connectors are intact. We do charge a 15% restocking fee if the fault was due to field wiring issues, configuration errors, or toolkit compatibility problems. We’ll work with you over the phone or email to diagnose the problem before we ship—our goal is to get you running, not to ship boxes back and forth.

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