DS200DCCAG4A | GE Speedtronic DIO | In Stock

Description

Product Introduction

The GE DS200DCCAG4A is a digital combinational I/O module for the Mark V Speedtronic turbine control system. It provides 16 digital inputs and 8 relay outputs in a single VME slot. This module is designed for small control applications requiring both input monitoring and output actuation without using separate modules.

Core advantage: The G4A revision combines input and output functions, saving VME rack space. The 8 relay outputs are rated 3 A at 250 V AC – sufficient for direct control of contactors, solenoids, and indicator lights without external interposing relays. Inputs accept 24-250 V DC (universal). Field data shows the DCCAG4A reduces I/O module count by 30% in auxiliary system applications (lube oil, cooling water, fuel gas).

Key Technical Specifications

Key Selling Points & Differentiators

• 16 inputs + 8 outputs in one slot – Replaces separate digital input and output modules. Saves VME rack space.
• 3 A relay outputs for direct actuation – Drives small motors, solenoids, contactors, and indicator lights. No external interposing relays needed.
• Universal inputs (24-250 V DC) – Accepts 24 V PLC signals or 125 V DC station battery inputs. No configuration jumpers.
• Relay outputs replaceable – Relays are socketed (not soldered). Field-replaceable without desoldering. Spare relays available ($15 each).
• Output status LEDs – Visual indication of each relay state. No need for external test points.
• Live tested with inductive loads – Each relay switches a 0.5 H solenoid (100 mA) for 10,000 cycles. No contact welding.
• 30-day warranty with cross-ship – Input failure or relay stuck? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DCCAG4A and using separate DS200CDBAG1 (inputs) and DS200RCCAG1 (relay outputs)?
A: Channel count and flexibility. DCCAG4A: 16 inputs + 8 relay outputs, fixed configuration. Separate modules: 32 inputs (CDBAG1) + 16 relay outputs (RCCAG1) but use 2 slots. For small I/O counts, DCCAG4A is more efficient. For large systems, separate modules are better.

Q: Can I use the relay outputs for 120 V AC control?
A: Yes – relay contacts are rated 3 A at 250 V AC. For 120 V AC solenoids or contactors, the relay works fine. Add a snubber (RC network) across the load to suppress arcing. We sell snubbers for $5 each.

Q: How do you test the relay outputs on refurbished boards?
A: We cycle each relay 10,000 times at 1 Hz with a 1 A resistive load. Contact resistance must stay below 100 mΩ. We also measure coil current (30 mA ±5 mA). About 8% of incoming DCCAG4A boards fail – welded contacts or high resistance. Those are repaired (replace relay).

Q: I see a DCCAG4A board with a green sticker near the relays. What does that mean?
A: The green sticker indicates the board received an additional “inductive load” test: 10,000 cycles with a 0.5 H solenoid (100 mA). The relay contacts must show no welding. Standard boards tested with resistive loads only. Green-sticker boards are for driving solenoids and contactors. We charge an extra $15 for green-sticker boards.

Q: My DCCAG4A relay channel 3 will not energize. Other channels work. What failed?
A: The relay coil driver transistor (channel 3) has failed open. Common failure due to back-EMF from inductive loads without a snubber. Repair cost is $95. We replace the driver transistor (ULN2003) and the relay (preventive). Turnaround is 5 days.

Q: How do I identify a counterfeit DS200DCCAG4A?
A: Genuine boards have “DCCAG4A” printed on the edge connector label. The relays are Omron G6RN-1 (3 A, sealed). Counterfeits often use generic relays with lower current rating (1 A). Also check the input optocouplers: genuine uses NEC PS2801-4 (16-pin SSOP). Fakes use Lite-On or unmarked. We photograph the relays on every board.

Q: Can I replace a failed relay myself?
A: Yes – relays are socketed (8-pin DIP). Remove the old relay (pull straight up). Insert new relay (Omron G6RN-1, 24 V DC coil). No soldering required. We sell replacement relays for $15 each. After replacement, test the channel with a multimeter before applying field voltage.

Q: What is the maximum inrush current for the relay outputs?
A: The relay contacts are rated for 3 A continuous. For incandescent lamps (10x inrush), 3 A contact can handle 30 A inrush for <10 ms. For motor loads (6x inrush), 3 A contact can handle 18 A inrush. For frequent starting (motor cycling every minute), derate to 1 A continuous to prevent contact welding.

Q: Does the DCCAG4A support 24 V AC inputs?
A: No – inputs are DC only (24-250 V DC). For AC inputs, use DS200CDBAG1 (AC/DC universal) or add an external rectifier. The DCCAG4A input optocouplers will turn off during AC zero-crossings, causing false pulses.

Q: What is the expected life of the onboard relays?
A: The Omron G6RN-1 is rated for 100,000 mechanical operations and 30,000 electrical operations at 3 A resistive. At 1 A resistive, life exceeds 100,000 operations. For frequent cycling (e.g., pulse output), use a solid-state relay (external). The mechanical relay is for occasional actuation (e.g., valve open/close).

Q: Do you offer a version with conformal coating for offshore use?
A: Yes – special order DS200DCCAG4ABB (acrylic coated). Lead time is 14-21 days. Cost adds 55. Coated version is recommended for offshore and coastal sites. The relays are sealed (no coating inside) but the PCB and driver ICs are coated. For offshore, also specify gold-plated terminal block (25 extra) for input and output connections.

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