GE IS200DTAOH1ABA | Mark VI Simplex Analog Output Terminal Board

• Brand: GE
• Full Model Number: IS200DTAOH1ABA
• Lifecycle Status: Legacy / Obsolete Mark VI Spare
• Core Function: Simplex analog output terminal board
• Top 3 Technical Specs: 8 analog output channels; 0–20 mA current outputs; DIN-rail mounting
• Stock & Condition: Physical stock verification required; New Surplus / Tested Refurbished; Emergency dispatch subject to QA release

Module 3: Obsolescence & Supply Chain Deep Dive

A failed GE IS200DTAOH1ABA can interrupt multiple analog control-output channels while the associated Mark VI controller and other terminal boards remain operational. The DTAO is a Simplex Analog Output terminal board used with the appropriate VAOC I/O hardware. GE system documentation describes DTAO as an eight-channel analog output board, with each output providing 0–20 mA current and accepting customer loads up to approximately 500 Ω. The board uses a 37-pin interface to the I/O rack and is designed for DIN-rail installation.

For an installed Mark VI control cabinet, replacing the exact terminal board is normally a much lower-TCO decision than redesigning eight analog output loops. Existing field wiring, actuator interfaces, controller configuration, and cabinet hardware can remain in service when the correct DTAO configuration is restored. This avoids panel fabrication, rewiring, application changes, and extended commissioning. —The important constraint is compatibility with the VAOC I/O hardware: GE documentation specifically states that DTAO is designed for VAOC and is not compatible with the PAOC I/O pack. A physically similar terminal board can therefore create a hardware-compatibility fault even when the connectors appear correct.

GE IS200DTAOH1ABA

Module 4: Compatibility & Replacement Matrix

Estimated switch cost/time: With an exact tested spare already at the facility, plan approximately 1–3 hours for controlled replacement, wiring verification, I/O recognition, output testing, and commissioning checks. A newly sourced board may require 1–5 business days for inspection and expedited transportation. These are planning estimates.

Field Traps — Watch Out

• VAOC versus PAOC: GE’s system documentation states that DTAO is designed for the VAOC analog-output I/O hardware and does not work with PAOC. This is the first compatibility check engineers should make.
• Board identification: DTAO includes an onboard ID device used by the I/O controller for board type, revision, serial information, and connector-location identification. A mismatch can generate a hardware incompatibility diagnostic.
• Output loading: Each analog channel supports a customer load of up to approximately 500 Ω in the documented DTAO configuration. Check actuator/input impedance before returning the loop to service.
• Simplex architecture: DTAO is intended for simplex applications. It should not be treated as interchangeable with dual or TMR terminal-board architectures.

Module 5: Quality Assurance & Testing SOP

The IS200DTAOH1ABA should be qualified as an analog-output interface assembly. A basic continuity check is not enough.

• Part-number verification: Confirm IS200DTAOH1ABA, board revision, serial/traceability information, and GE identification markings.
• OEM anti-counterfeit visual inspection: Inspect GE labels, PCB markings, connector construction, components, terminal blocks, and evidence of unauthorized modification.
• Physical condition inspection: Check the PCB, DIN-rail mounting hardware, terminal blocks, 37-pin connector, resistors, capacitors, and solder joints for damage or thermal discoloration.
• Connector inspection: Examine the 37-pin interface for bent contacts, contamination, corrosion, damaged latching hardware, and mechanical wear.
• Terminal inspection: Verify all field terminals for damaged screws, loose connections, oxidation, and physical deformation.
• ID-device verification: Confirm the terminal board identification data and verify that the board is recognized as the expected DTAO hardware.
• Continuity testing: Check applicable power, ground, signal-return, and output paths before energization.
• Power-on self-test (POST): Install the board with the compatible VAOC test hardware and verify normal startup and board recognition.
• Status/diagnostic check: Confirm the associated I/O controller reports the terminal board without hardware-compatibility faults.
• Eight-channel output testing: Exercise all eight analog output channels independently.
• Current-output verification: Apply representative commands and measure the corresponding 0–20 mA output on every channel.
• Zero-scale test: Verify correct output near the programmed minimum command.
• Full-scale test: Verify correct output near the programmed maximum command.
• Linearity testing: Test multiple points across the output range and record deviation.
• Load testing: Apply representative loads up to the applicable customer-load limit while monitoring output stability.
• Feedback verification: Where the VAOC architecture uses local current feedback, confirm the I/O controller receives the expected feedback signal.
• Cable/interface testing: Verify communication between the terminal board and the VAOC I/O hardware through the 37-pin connection.
• Output isolation check: Verify that unwanted shorts or leakage do not exist between adjacent output circuits or signal and common paths.
• I/O load testing: Exercise multiple analog channels simultaneously while monitoring current stability and board temperature.
• Extended observation: Maintain multiple outputs under representative load to expose intermittent output, connector, or thermal faults.
• Final QC release: Record full part number, revision, ID information, eight-channel measurements, load-test results, photographs, condition grade, test date, and QC authorization.

GE documentation describes DTAO as an eight-channel, single-ended 0–20 mA analog-output terminal board, with outputs capable of driving customer loads up to 500 Ω. The board dimensions are approximately 8.6 cm wide × 16.2 cm high, with a documented operating range of 0°C to 60°C for the referenced DTAO configuration.

Module 6: Procurement & Lifecycle FAQ

Q1. Is the GE IS200DTAOH1ABA genuinely in stock, and what is the cutoff for emergency shipping?
Physical inventory should be verified against the exact marking and board revision before the PO is accepted. Emergency dispatch depends on QA completion, warehouse location, carrier pickup time, and destination. Same-day shipment should only be confirmed after the actual board has been identified and released.

Q2. How do you guarantee the condition and authenticity of an ?
Require exact part-number verification, OEM visual inspection, PCB and connector inspection, ID-device verification, controlled power-up, all-eight-channel current-output testing, load testing, and documented QC results. Photographs of the actual board and identification markings should remain with the procurement record.

Q3. Can the work with a PAOC I/O pack?
No. GE system documentation specifically states that the DTAO terminal board does not work with the PAOC I/O pack. The associated I/O hardware must therefore be verified before the replacement is approved.

Q4. Does the require firmware compatibility checks?
The terminal board itself is not normally treated as the primary firmware-bearing controller. The more important checks are the compatible VAOC I/O hardware, terminal-board identification data, board revision, connector location, output scaling, and existing controller configuration. The board’s ID device is read by the I/O controller as part of hardware identification.

Q5. What warranty and return terms should be written into the PO?
Specify warranty duration, DOA coverage, eight-channel analog-output performance, 0–20 mA conformity, connector and terminal integrity, hardware-identification conformity, return authorization, inspection period, and serial-number traceability. For refurbished inventory, require the actual eight-channel output test record and define whether commissioning-stage failures are covered.