IS230SRTDH2A - Simplex Resistance Temperature Detector Terminal Board

SPECIFICATIONS:

Part Number: IS230SRTDH2A
Manufacturer: General Electric
Series: Mark VIe
Product Type: Simplex Resistance Temperature Detector Terminal Board
Hardware Revision: H2A
Number of Channels: 8
RTD types: 200 platinum
Span: 0.3532 to 4.054 V
Maximum lead resistance: 15
Input Channels: 12 Channels (2-, 3-, or 4-wire)
Sensor Compatibility: Platinum, Nickel, Copper, Nicrosil-Nisil
Terminal Blocks: Euro-block
Isolation Rating: 1500 V RMS
Operating Voltage: 24 V DC
Mounting Type: DIN-rail / Panel Mount
Operating Temperature: -30°C to +65°C (-22°F to +149°F)
Storage Temperature: -40°C to +85°C (-40°F to +185°F)
Relative Humidity: 5% to 95% Non-Condensing
Cooling Requirements: Free air convection
Repair Lead Time: 3 to 5 Business Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION OF IS230SRTDH2A:

The IS230SRTDH2A is a Simplex Resistance Temperature Detector Terminal Board designed and manufactured by General Electric as part of the Mark VIe series used in distributed turbine control systems. SRTDH2A 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. A single cable with a DC-37 pin connector connects the SRTD to the VME rack where the VRTD is located. This cable is identical to those used on the larger TRTD terminal board. Two SRTD boards can be connected to the VRTD to give a total of 16 temperature inputs.

INSTALLATION:

The SRTDH2A and a plastic insulator mount on a sheet metal carrier which mounts on a DIN rail. Optionally, the SRTD and insulator mount on a sheet metal assembly that bolts directly into 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. 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).

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.

WHY BUY FROM WOC

World of Controls is an industry-leading provider of high-reliability OEM replacement parts engineered for mission-critical turbomachinery, governor systems, and heavy industrial controls. Dedicated to preventing unscheduled plant shutdowns, we maintain an extensive stock of UNUSED surplus and precision-REBUILT control boards, I/O modules, and central processing units—all covered by full warranty assurances. To guarantee uncompromised performance, our certified technical team subjects every reconditioned component to exhaustive physical inspections, circuit trace testing, and simulated operational load trials before release. Beyond component delivery, we provide rapid-response bench repair solutions and direct unit exchange options to minimize lead times on essential legacy equipment. Supported by around-the-clock technical support for cross-part identification, stock confirmation, and urgent dispatch, we deliver the hardware and expertise needed to keep your plant online. Contact us today for instant quotes, stock inquiries, or priority international delivery.

FREQUENTLY ASKED QUESTIONS:

What is GE IS230SRTDH2A?

The GE IS230SRTDH2A is a Simplex Resistance Temperature Detector (SRTD) Terminal Board manufactured by General Electric for the Speedtronic Mark VIe turbine control system. It provides 12 precision input channels to interface temperature sensors with system I/O packs.

How many RTD inputs does the IS230SRTDH2A support, and how are they expanded?

The board natively supports 8 RTD inputs. Up to two SRTD boards can be connected to a single VRTD processor via DC-37 pin cables to provide a total capacity of 16 temperature input channels.

What excitation current and cable distance limits apply to the board?

The board supplies a 10 mA DC multiplexed excitation current to each RTD. Sensors can be located up to 300 meters (984 feet) away from the turbine control cabinet with a maximum two-way cable resistance of 15 Ω.

How does the PRTD I/O processor sample and process RTD signals?

The A/D converter samples inputs and excitation currents at 4 times per second during normal mode scanning and 25 times per second during fast mode scanning, applying hardware linearization for up to 15 RTD types.

How are RTD faults handled by the system?

Out-of-range values trigger open and short circuit detection. Faulty channels are automatically removed from scanning to protect other inputs. Once repaired, channels are automatically reinstated in 20 seconds or manually reset.

What mounting options and terminal connections are provided?

The SRTDH2A mounts with a plastic insulator on a sheet metal carrier for DIN-rail or panel cabinet installation. Field wiring attaches to a 36-terminal Euro-block terminal connector using recommended #18 AWG shielded twisted triplet wire.