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TECHNICAL SPECIFICATIONS
Part Number: IS230SRTDH1A
Manufacturer: General Electric (GE) / GE Vernova
Control System Series: Speedtronic Mark VIe Control System
Functional Acronym: SRTD
Product Type: Compact RTD Input Terminal Board / Assembly
Hardware Revision Group: H1A (First-Generation Compact Form Factor Layout)
Configuration Setup: Simplex Channel Operation
Total RTD Channels: 8 Input Channels per Board
I/O Processor Compatibility: Directly mates with PRTD (e.g., IS220PRTDH1A, IS220PRTDH1B) or VRTD Modules
Mounting Infrastructure: DIN-Rail Mounting or Flat Panel Cabinet Integration
Terminal Block Design: High-Density Pluggable Euro-Style Box Terminal Blocks
Excitation Current Profile: 10 mA DC Multiplexed Drive Current
Distance Threshold: Supports Sensor Cable Runs up to 300 meters (984 feet)
Maximum Loop Resistance: 15 Ohms Maximum Continuous Two-Way Cable Resistance
Sampling Rate Execution: 4 samples/sec (Normal Mode) / 25 samples/sec (Fast Scan Mode)
Diagnostic Architecture: Integrated Onboard Board-ID Chip Verification
Operating Temperature Window: -30°C to +65°C (-22°F to 149°F)
Circuit Protection Profile: Built-in High-Frequency Noise Suppression & Surge Protection
Repair Time: 3-5 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D
IS230SRTDH1A is a Simplex Resistance Temperature Device (RTD) Terminal Board designed and manufactured by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. SRTD 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 PRTD I/O pack works with the SRTD. The I/O pack plugs into the DC-37 pin connector and communicates with the controller over Ethernet. Only simplex systems are supported.
INSTALLATION:
The SRTD and a plastic insulator are mounted on a sheet metal carrier, which mounts on a DIN rail. Optionally, the SRTD and insulator are mounted 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. 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).
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 PARTNER WITH WORLD OF CONTROLS
WOC offers the largest inventory of OEM replacement parts for GE Distributed Control Systems, ensuring that you have access to high-quality, reliable components when you need them most. In addition to supplying unused OEM parts, we also provide repaired and rebuilt boards, all backed by a warranty for your peace of mind. Our experienced team of automation experts is available 24/7 to assist with any OEM-related requirements, from troubleshooting and repairs to recommending the right replacement parts. Whether you need support for urgent system repairs or routine maintenance, WOC is committed to delivering fast, dependable solutions tailored to your needs. For detailed pricing, availability, or technical assistance regarding parts and repairs, please reach out to our team via phone or email, and we will be happy to provide prompt support.
What is the GE IS230SRTDH1A?
The IS230SRTDH1A is a Simplex Resistance Temperature Device (RTD) Terminal Board manufactured by General Electric for the Speedtronic Mark VIe control system. It functions as an entry termination interface that organizes field wiring, suppresses high-frequency noise, and channels dynamic thermal signals from up to 8 field sensors directly into a plugged-in Mark VIe I/O pack.
What is the primary function of the RTD Terminal Board?
The RTD Terminal Board provides the terminal block connection points, noise filtering, and circuit protection required to interface up to 8 field-installed temperature sensors with a central control system.
Which GE Mark VIe I/O packs plug directly into this terminal board?
This board is designed to interface directly with the Resistance Temperature Device Input Pack (PRTD), including models like the IS220PRTDH1A and IS220PRTDH1B, via its integrated 37-pin connector interface.
How many RTD channels are supported by a single IS230SRTDH1A?
A single board features terminal block connections and conditioning traces for up to 8 independent RTD input channels.
What types of RTD sensors can be wired into the terminal blocks?
The board and its corresponding control software support a wide range of industry-standard RTD configurations, including 3-wire copper, platinum (100-ohm Pt), and nickel sensors, in both grounded and ungrounded installation styles.
