IS230STAI2ASRTD2AG01 - Simplex Analog I/O Assembly Module

SPECIFICATIONS:

Part Number: IS230STAI2ASRTD2AG01
Manufacturer: General Electric
Series: Mark VIe
Product Type: Simplex Analog I/O Terminal Board
Number of channels: 8
Input Span: 1-5 V dc
Outputs: 24 V outputs
Technology: Surface Mount
Maximum Lead Resistance: 15 Ohms
Output load: 500 Ohms
Analog output current: 0-20 mA
Operating temperature: -30 to 65 °C
Size: 10.16 cm wide x 33.02 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS230STAI2ASRTD2AG01 is a Simplex Analog I/O Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The SRTD2AG01 board is a compact RTD terminal board, designed for DIN-rail or flat mounting. The board has eight RTD inputs and connects to the PRTD or VRTD I/O processor. High-density Euro-block type terminal blocks are mounted to the board. An on-board ID chip identifies the board to the I/O processor for system diagnostic purposes. The VRTD board does not work with SRTD. A single cable with a DC-37 pin connector connects SRTD2AG01 to the VME rack where the VRTD is located. This cable is identical to those used on the larger TRTD terminal board. Two SRTD2AG01 boards can be connected to the VRTD to give a total of 16 temperature inputs. Only simplex systems are supported.

INSTALLATION:

The SRTD2AG01 and a plastic insulator are mounted on a sheet metal carrier that mounts on a DIN rail. Optionally, the SRTD and insulator are mounted on a sheet metal assembly that bolts directly to a cabinet. The eight RTDs are wired directly to the Euro-style box-type terminal block, which has 36 terminals and is available in two types. Typically, #18 AWG wires (shielded twisted triplet) are used. The I/O cable shield terminal uses an external mounting bracket supplied by GE or the customer. Terminals 25 through 34 are not connected. E1 and E2 are mounting holes for the chassis ground screw connection (SCOM). Two types of Euro-style box-type terminal blocks are available:

• Terminal board SRTDH1 has a permanently mounted terminal block with 36 terminals.
• Terminal board SRTDH2 has a right-angle header accepting a range of commercially available pluggable terminal blocks, with a total of 36 terminals.

OPERATION:

The terminal board supplies a 10 mA DC multiplexed (not continuous) excitation current to each RTD, which can be grounded or ungrounded. The eight RTDs can be located up to 300 m (984 ft) from the turbine control cabinet with a maximum two-way cable resistance of 15. The on-board noise suppression is similar to that on the TRTD. The RTD inputs and signal processing are illustrated in the figure. The A/D converter in the PRTD pack samples each signal and the excitation current four times per second for normal mode scanning, and 25 times per second for fast mode scanning, using a time sample interval related to the power system frequency. Linearization for the selection of 15 RTD types is performed by the processor. RTD open and short circuits are detected by out-of-range values. An RTD that is determined to be out of hardware limits is removed from the scanned inputs to prevent adverse effects on other input channels. Repaired channels are reinstated automatically in 20 seconds or can be manually reinstated.

CONFIGURATION:

The SRTD2AG01 terminal board utilizes a jumper-based configuration system, allowing for a flexible setup to accommodate various application requirements. All configuration jumpers are clearly marked on the board, and their precise locations can be found in the installation diagram provided in the technical documentation. This design ensures ease of customization for both input and output signal types. For the analog inputs, configuration options include:

• Jumpers J1A through J8A: Select between the current input and the voltage input for each of the eight primary input channels.
• Jumpers J1B through J8B: Determine whether the input return is connected to common ground or left floating, allowing for different grounding schemes based on field requirements.
• Jumpers J9A and J10A: Configure the current range for the remaining two input channels, selecting between 1 mA and 20 mA to suit low-level or standard current loop signals.
• Jumpers J9B and J10B: Similar to the first eight channels, these jumpers define whether the return for these inputs is tied to common or isolated.
• Jumper J0: Adjusts Output 1 to operate in either the 20 mA range or the 200 mA range, ensuring compatibility with high-current applications when required.

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FREQUENTLY ASKED QUESTIONS:

What is the IS230STAI2ASRTD2AG01?

It is a Simplex Analog I/O Terminal Board used in GE Mark VIe turbine control systems for RTD signal acquisition. The board supports eight RTD inputs and communicates with the PRTD or VRTD processor modules. Its high-density connectors and onboard identification chip ensure reliable integration and system diagnostics.

What type of RTDs are supported?

The board supports 15 RTD types through processor-based linearization. Both grounded and ungrounded RTDs can be connected due to the multiplexed 10 mA excitation design. RTDs may be installed up to 300 meters away while maintaining accuracy and noise immunity.

How is the board configured for different applications?

Configuration is jumper-based, allowing selection of input type (current or voltage), grounding scheme, and output current range. Jumpers are clearly marked on the board for easy setup. Output 1 can be set for 20 mA or 200 mA operation for high-current applications.