IS230SAIIH2A - Simplex Analog I/O Assembly Module

SPECIFICATIONS:

Part Number: IS230SAIIH2A
Manufacturer: General Electric
Series: Mark VIe
Module Type: Simplex Analog I/O Assembly
Number of channels: 12
Power supply voltage: 24 V dc
Voltage Range: 18 - 32 VDC
Maximum lead resistance: 15 Ohms
Input Signal Types: 4-20 mA
Output Signal Types: 4-20 mA
Resolution: 12-16 bit
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65°C
Size: 15.9 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

IS230SAIIH2A is a Simplex Analog I/O Assembly Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Simplex Analog I/O Assembly Module serves as the interface between turbine field instrumentation and the distributed control system. It provides analog input channels for acquiring signals from transmitters and sensors that monitor key turbine parameters such as pressure, temperature, vibration, and flow. These signals are electrically isolated, noise-filtered, and digitized through high-resolution A/D conversion before being transmitted to the turbine control processor for real-time monitoring and control functions.

The module provides analog output channels that use D/A conversion to generate precise control signals in standard ranges such as 4-20 mA or 0-10 VDC. These outputs are used to drive actuators, fuel control valves, and positioning devices within the turbine system. The simplex design offers a single signal path without redundancy, making it a cost-effective solution for non-critical applications. Integrated diagnostics continuously monitor channel integrity, signal range, and module health, with fault conditions reported to the control system. The module typically includes both analog input (AI) and analog output (AO) channels:

• Analog Inputs (AI): Accept signals from process transmitters and sensors (e.g., temperature, pressure, flow, vibration). These signals are conditioned, filtered, and converted from analog to digital format using high-resolution A/D converters. The converted data is then transmitted to the controller for monitoring, protection, and control purposes.

• Analog Outputs (AO): Provide control signals in standard current or voltage ranges (such as 4–20 mA or 0–10 VDC). These outputs drive actuators, control valves, speed controllers, and other field devices. D/A converters generate precise analog signals based on commands received from the controller.

INSTALLATION:

The SAII, plus a plastic insulator, mounts on a sheet metal carrier that then mounts on a DIN-rail. Optionally, the SAII plus insulator mounts on a sheet metal assembly and then
bolts directly to a cabinet. There are two types of Euro-block terminal blocks available as Follows:

• SAIIH1 has a permanently mounted terminal block with 48 terminals.
• SAIIH2 has a right-angle header accepting a range of commercially available pluggable terminal blocks, with a total of 48 terminals.

OPERATION:

The module continuously samples analog input signals at configurable scan rates, typically in the millisecond range, to support real-time turbine monitoring and control. Analog inputs are conditioned to remove high-frequency noise and then digitized to produce high-resolution measurements, which are communicated to the distributed controller for feedback, control loops, and protective logic execution.

Analog output channels convert digital control values into analog signals that actuate fuel valves, positioners, and other turbine control devices with precise resolution. The simplex configuration processes signals through a single channel, making it suitable for non-redundant control paths. The module supports fault detection, including over-range, under-range, short/open circuit, and channel failure detection, enabling the control system to take corrective actions or trigger alarms.

CONFIGURATION:

Jumpers configure the terminal board. The JP1B through JP10B jumpers determine the common connection and provide ample voltage clearance to preserve the isolation voltage rating when they are removed. For convenience, the SAII board provides storage locations for jumpers that do not provide a path to the common. The jumper choices are as follows:

• Jumpers JP1A through JP8A select either the current input or the voltage input.
• Jumpers JP9A and JP10A select either 1 mA or 20 mA input current.
• Jumpers JP1B through JP10B select whether the return is connected to common or is left open.
• When any of the JP1B to JP10B is in place and the return is connected to common, then that respective channel will not be point isolated.
• Jumper JP11 sets output 1 to either 20 mA or 200 mA when used with a SAII I/O pack.

WORLD OF CONTROLS maintains one of the largest stocks of OEM replacement parts for GE Distributed Control Systems (DCS), providing quick and reliable access to critical components. We supply brand-new, unused parts as well as fully tested and rebuilt boards, all backed by a comprehensive warranty to ensure quality and performance.

In addition to parts supply, WOC offers expert repair services to restore faulty boards to OEM specifications, minimizing downtime and extending system life. Our team of engineers and technicians is available 24/7 to support your automation needs, offering guidance on troubleshooting, diagnostics, and system upgrades. For pricing, availability, or technical assistance, please contact us by phone or email.

FREQUENTLY ASKED QUESTIONS:

What is the primary function of the Simplex Analog I/O Assembly Module?

The module provides the interface between field sensors and actuators and the turbine control system, handling analog input (AI) for measurement and analog output (AO) for control.

How frequently are analog signals sampled and updated?

Input channels are typically sampled at rates below 10 ms per channel, ensuring real-time performance for turbine monitoring and control loops. Output signals are updated at comparable intervals to maintain precise actuation of valves and positioning devices.

What signal conditioning is applied to analog inputs?

Analog inputs undergo low-pass filtering to remove high-frequency noise, linearization for non-linear sensor characteristics (e.g., thermocouples), and scaling to match the controller’s engineering units. Each channel is galvanically isolated to prevent ground loops and protect against electrical transients.