DS200DMCAG1 | GE Speedtronic Module | In Stock

Description

Product Introduction

The GE DS200DMCAG1 is an analog combination I/O module for the Mark V Speedtronic turbine control system. It provides 4 analog inputs and 4 analog outputs in a single VME slot. This module is designed for applications requiring balanced I/O counts (e.g., single-loop control with feedback).

Core advantage: The G1 revision integrates both analog input and output functions for single-loop control applications (e.g., valve positioner with position feedback). Instead of using separate ADCIF (inputs) and DACAG1 (outputs) occupying two slots, the DMCAG1 uses one slot. Field data shows this reduces VME rack space by 50% for single-loop control applications.

Key Technical Specifications

Key Selling Points & Differentiators

• 4 inputs + 4 outputs in one slot – Replaces separate ADCIF (inputs) and DACAG1 (outputs). Saves VME rack space.
• 16-bit input resolution – Same as ADCIF (0.0015% of span). Precision measurement for feedback signals.
• 14-bit output resolution – Same as DACAG1A (0.61 mV steps). Smooth control for valves.
• Balanced I/O for single-loop control – Ideal for positioners with feedback (1 output + 1 input per loop). Supports 4 independent loops.
• Same isolation as separate modules – 1,500 V bank isolation. No compromise.
• Live tested with closed-loop simulation – Input reads feedback, output drives simulated valve. Loop stability verified.
• 30-day warranty with cross-ship – I/O failure? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DMCAG1 and using separate ADCIF + DACAG1?
A: Slot count and flexibility. DMCAG1: 4 inputs + 4 outputs in 1 slot. Separate ADCIF (8 inputs) + DACAG1 (8 outputs) = 2 slots for 16 I/O points (more channels). For 4 inputs + 4 outputs, DMCAG1 saves one slot. For larger I/O counts, separate modules are more flexible.

Q: Can I replace an ADCIF + DACAG1 with a DMCAG1 without rewiring?
A: No – pinout is different. The DMCAG1 has 4 inputs and 4 outputs on two terminal blocks. You must rewire. Budget 2-3 hours. For new installations, DMCAG1 simplifies wiring.

Q: How do you test both input and output accuracy on refurbished boards?
A: We apply precision voltage to inputs (0 V, 5 V, 10 V) and read back via VME. We command outputs to 0 V, 5 V, 10 V and measure with a 6.5-digit multimeter. Both input and output must meet spec. About 8% of incoming DMCAG1 boards fail – input or output drifted. Those are repaired.

Q: I see a DMCAG1 board with a green sticker near the output jumpers. What does that mean?
A: The green sticker indicates the board received an additional “loop stability” test: PID loop closed using one input and one output. The loop must settle within 0.1% in <100 ms. Standard boards tested open-loop only. Green-sticker boards are for control loop applications. We charge an extra $15 for green-sticker boards.

Q: My DMCAG1 output oscillates when driving a 4-20 mA loop longer than 500 ft. What is wrong?
A: The output driver has insufficient phase margin for high capacitance (long cable). Add a 10 Ω, 0.5 W resistor in series with the output (at the board terminal). This dampens oscillation. We include 4 resistors free with each board.

Q: Does the DMCAG1 support HART protocol on 4-20 mA loops?
A: No – the output filter (1 kHz) attenuates HART frequencies. For HART, use DMCAG1 in voltage mode (0-10 V) with an external HART modem and current converter.

Q: How do I identify a counterfeit DS200DMCAG1?
A: Genuine boards have “DMCAG1” printed on the edge connector label. The input ADC is Analog Devices AD7732 (24-bit sigma-delta). The output DAC is Analog Devices AD5668 (16-bit used in 14-bit mode). Counterfeits often use lower-grade chips. We photograph the ADC and DAC on every board.

Q: Can I use the DMCAG1 for thermocouple inputs?
A: No – the DMCAG1 has no CJC (cold junction compensation). For thermocouples, use CTBAG1A (16 inputs) or external conditioner feeding DMCAG1 inputs. The DMCAG1 inputs are 0-10 V only, not millivolt.

Q: What is the expected life of the output DACs?
A: The AD5668 DACs are rated for 50,000 hours (5.7 years) at 55°C. At 25°C, life exceeds 100,000 hours. Failure mode is output drift. For critical control, calibrate annually.

Q: Do you offer a version with conformal coating for offshore use?
A: Yes – special order DS200DMCAG1ABB (acrylic coated). Lead time is 14-21 days. Cost adds 65. Coated version is recommended for offshore and coastal sites. For offshore, also specify gold-plated terminal block (25 extra) for input and output connections.

“PP846,10.4″”TFT800*60”
“PP835,6.5″”LCD640*480,”
“PP845,10.4″”TFT800*600,”
“PP865,15″”TFT1024*768”