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SPECIFICATIONS:
Part Number: IS200DTAOH1A
Manufacturer: General Electric
Series: Mark VIe
Product Type: Analog Output Simplex Terminal Board
Number of Channels: 8
Analog Output Current: 0-20 mA
Customer load resistance Up to 500 Ohms
Number of outputs: 125 V dc
Technology: Surface Mount
Suppression: MOV across the solenoid
Trip interlock isolation: Optical isolation to 1500 V
Size: 8.6 cm wide x 16.2 cm high
Operating Temperature: 0 to 60�C
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421H
FUNCTIONAL DESCRIPTION:
IS200DTAOH1A is an Analog Output Simplex Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Turbine Control Systems. The DTAOH1A board is a compact, high-efficiency analog output terminal designed for DIN-rail mounting, making it ideal for industrial automation systems where space optimization is key. Specifically built for simplex setups, it interfaces exclusively with the VAOC I/O board, delivering precise and reliable analog signal outputs. The board features eight analog output channels and connects to the VAOC via a single 37-pin D-type cable, which is also compatible with the larger TBAO terminal board. For expanded output needs, two DTAO boards can be linked to a single VAOC, providing up to 16 analog channels in a modular, scalable configuration.
The DTAOH1A features high-density Euro-block terminal blocks securely mounted to the board, providing durable, vibration-resistant wire connections. Dual SCOM (signal common) screw terminals ensure reliable grounding, enhancing signal integrity and minimizing susceptibility to electrical noise. Internally, the board incorporates advanced noise suppression and signal conditioning circuitry identical to that in the TBAO, guaranteeing stable operation even in the electrically noisy environments typical of industrial control cabinets. A built-in identification (ID) chip enables automatic recognition by the VAOC, simplifying system diagnostics, error detection, and configuration during commissioning. With its compact design, robust electrical performance, and seamless VAOC compatibility, the DTAO is an ideal solution for distributed control systems requiring reliable analog outputs in space-constrained installations.
INSTALLATION:
The board is installed in a plastic holder that mounts directly onto a DIN rail. Its eight analog outputs are connected to a permanently mounted 36-terminal Euro-block, as illustrated below. The driven devices should have a resistance no greater than 500 ohms and can be located up to 300 m (984 ft) from the turbine control cabinet. Shielded twisted-pair wires, typically #18 AWG, are recommended for these connections. Two screws provide the SCOM (ground) connection, which should be kept as short as possible. To optimize cabinet space, multiple DIN-type terminal boards can be stacked vertically on the DIN rail.
OPERATION:
The module supports up to eight analog control outputs, each featuring a local loop current sense resistor for continuous monitoring of the voltage drop. This feedback is sent to the VAOC (Voltage-to-Analog Output Controller), which regulates the output current using its digital-to-analog (D/A) converter and output driver circuitry. The system design provides precise, real-time feedback control with enhanced noise immunity, making the DTAO module ideal for critical industrial automation applications that demand accurate analog signal generation and reliable operation.
WOC offers the largest inventory of OEM replacement parts for GE Distributed Control Systems, providing quick access to new, unused, and expertly rebuilt boards, all backed by a warranty. In addition to parts supply, we specialize in repairing faulty units, ensuring reliable performance that meets or exceeds original specifications. Our team of experts is available 24/7 to provide technical support, troubleshooting, and guidance for all automation needs, making it easy to maintain, upgrade, or expand your systems. For pricing, availability, or repair services, you can reach us by phone or email, ensuring seamless support and uninterrupted system operation.
How does the DTAO maintain accurate analog output signals?
Each channel includes a local loop current sense resistor that continuously monitors the voltage drop. This feedback is sent to the VAOC, which uses its digital-to-analog (D/A) converter and output driver circuitry to regulate the output current. This ensures high precision, real-time feedback control, and consistent signal generation.
What type of wiring and terminal connections are recommended?
The DTAO uses high-density Euro-block terminal blocks with 36 terminals, permanently mounted for vibration-resistant connections. Shielded twisted-pair wires, typically #18 AWG, are recommended to minimize noise. Two screws are provided for the SCOM (ground) connection, which should be kept as short as possible to maintain signal integrity.
What is the maximum resistance for driven devices and the maximum cable length?
Driven devices should not exceed 500 ohms. The maximum cable length from the control cabinet to the driven device is 300 m (984 ft) to maintain signal integrity.
How does the DTAO communicate with the VAOC?
The DTAO communicates with the VAOC (Voltage-to-Analog Output Controller) via a 37-pin D-type connector cable, which carries all analog output signals, control references, and feedback loops. Each of the eight analog channels on the DTAO has a dedicated feedback path through a local current sense resistor.
