IS230SRTD2ASRTD2AG01 - Simplex Analog I/O Terminal Board

SPECIFICATIONS:

Part Number: IS230SRTD2ASRTD2AG01
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:

IS230SRTD2ASRTD2AG01 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 SRTD 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 shielded twisted-pair (STP) wires 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 sampling 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.

WHY CHOOSE WOC?

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FREQUENTLY ASKED QUESTIONS:

What is the IS230SRTD2ASRTD2AG01?

It is a Simplex Analog I/O Terminal Board manufactured by General Electric as part of the Mark VIe Distributed Control System. It is designed to interface RTD sensors with the control system for accurate temperature monitoring. The module processes input signals and communicates them to compatible I/O processors for control and diagnostics.

What type of excitation current is used for RTD measurement?

The module supplies a 10 mA DC multiplexed excitation current to each RTD rather than a continuous signal. This approach reduces power dissipation in the sensor and minimizes thermal drift. It also allows sequential sampling of multiple channels with high accuracy.

What is the sampling rate of the RTD signals?

The connected I/O processor samples each RTD input at 4 samples per second in normal mode and up to 25 samples per second in fast mode. The sampling interval is synchronized with the power system frequency. This ensures stable and noise-resistant signal acquisition.

How does the module perform RTD linearization?

RTD linearization is handled by the I/O processor using predefined curves for up to 15 different RTD types. The processor converts resistance values into accurate temperature readings. This eliminates the need for external linearization hardware.