IS200STAOH1A - Simplex Analog Output Terminal Board

SPECIFICATIONS:

Part Number: IS200STAOH1A
Manufacturer: General Electric
Series: Mark VIe
Product Type: Simplex Analog Output Terminal Board
Number of channels: 8
Power supply voltage: 28 V dc
Analog output current: 0-20 mA
Voltage Range: 14 to 32 V dc
LVDT excitation output: 3.2 ±0.2 kHz
Outputs: 24 V DC
Customer load resistance: Up to 900
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65°C
Size: 15.9 cm high x 10.2 cm
Repair: 3-7 days
Availability: In Stock
Weight: 3 lbs
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION OF IS200STAOH1A:

IS200STAOH1A is a Simplex Analog Output Terminal Board designed and manufactured by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The STAOH1A board is a compact analog output terminal board, designed for DIN-rail or flat mounting. STAO has eight 0-20 mA analog outputs driven by the PAOC I/O pack or by the VAOC I/O board. The on-board circuits and noise suppression are the same as those on the TBAO terminal board. High-density Euro-block type blocks are mounted on the board for wiring to the customer devices terminal ID chip identifies the board to the I/O processor for system diagnostic purposes. The STAOH1A I/O pack works with the STAO. The I/O pack plugs into the D-type connector and communicates with the controller over Ethernet. Only simplex systems are supported.

INSTALLATION:

The STAO and a plastic insulator are mounted in a panel or on a DIN-rail-mounted sheet metal carrier. The STAO plus insulator mount can also be attached to a sheet metal assembly that is bolted directly to a cabinet. Driven equipment can be placed up to 300 meters (984 feet) away from the turbine control cabinet and shouldn't have a resistance greater than 900. There are two varieties of Euro-block terminal blocks:

• STAOH1 has an unpluggable mounted terminal block with 36 terminals.
• STAOH2 has a permanently mounted terminal block with 36 terminals.

According to the next illustration, the eight analog outputs are connected directly to the terminal block. The SCOM connection is secured by two screws. Normally, shielded twisted-pair wires #18 AWG are utilized. A GE or customer-supplied external mounting bracket is used for the I/O cable shield terminal. For the chassis ground screw connection, mounting holes E1 and E2 are present (SCOM). To maximize cabinet space, vertical stacking of DIN-type terminal boards is possible on the DIN-rail.

OPERATION:

STAOH1A offers eight outputs for analog control current. The voltage drop across the local loop current sense resistor is monitored on each output, and the signal is then given back to the I/O processor that regulates the current. Near each output's point of signal egress, filters decrease high-frequency noise and prevent surges. The drivers that produce the regulated currents are housed in the I/O processor along with the D/A converter.

WHY BUY FROM WOC:

World of Controls offers an extensive inventory of GE Distributed Control System (DCS) replacement parts to support industrial automation, system maintenance, and operational reliability. We supply unused and rebuilt components backed by a warranty, along with professional repair and exchange solutions for faulty circuit boards and control system components. Our comprehensive product and service offerings help customers source suitable replacement parts, address equipment failures, and reduce unplanned downtime. With an experienced technical team available 24/7, we provide responsive assistance with component identification, spare parts requirements, repair enquiries, and OEM-related automation needs. We are committed to delivering dependable service, flexible sourcing options, and worldwide shipping to meet the requirements of industrial facilities across the globe. Contact our team by phone or email for current stock availability, competitive pricing, warranty details, and repair or exchange options tailored to your GE DCS requirements.

FREQUENTLY ASKED QUESTIONS:

What is GE IS200STAOH1A?

GE IS200STAOH1A is a Simplex Analog Output Terminal Board designed for the Mark VIe turbine control system. It provides eight analog current outputs in the 0–20 mA range for interfacing with external control devices. The board supports signal conditioning, noise suppression, and output current monitoring to support reliable industrial control operations.

How does the STAOH1A regulate analog output current?

The Simplex Analog Output Terminal Board monitors the voltage drop across a local current-sensing resistor on each output channel. This feedback signal is returned to the I/O processor, which regulates the output current according to the commanded value. The output drivers and digital-to-analog conversion circuitry are located in the associated I/O processor.

What is the output current range of the Simplex Analog Output Terminal Board?

The Simplex Analog Output Terminal Board supports eight analog output channels with a specified current range of 0–20 mA. Each channel provides a control signal to compatible field equipment based on commands from the Mark VIe control system. The connected load must remain within the specified electrical limits.

What is the maximum field load resistance supported by the Simplex Analog Output Terminal Board?

The specified maximum customer load resistance is 900 ohms. The total loop resistance, including the connected device and field wiring, should be checked against the applicable installation requirements. Excessive load resistance can prevent the output from reaching its commanded current.

How does the STAOH1A reduce electrical noise on analog output signals?

The terminal board incorporates filtering circuits near the output signal connections to reduce high-frequency noise and help suppress electrical surges. Its onboard circuitry and noise suppression are described as being similar to those used on the GE TBAO terminal board. Appropriate shielded twisted-pair wiring and correct grounding further support signal integrity.