1. General Description

This Analog I/O Terminal Board serves as the front-end field wiring interface for the PAIC analog I/O module.
It provides high-density signal termination for analog inputs and outputs, enabling reliable connection of field transmitters and actuators while simplifying cabinet wiring and maintenance.

2. Channel Configuration

Analog Inputs (AI):

10 channels

Supports:

Two-wire transmitters

Three-wire transmitters

Four-wire transmitters

Externally powered transmitters

Analog Outputs (AO):

2 channels

3. Signal Types and Ranges

AI signal type:

4–20 mA current input

Internally converted to 1–5 V via 250 Ω precision resistor

AO signal type:

Standard 0–20 mA

Jumper-selectable 0–200 mA for higher load drive capability

4. Electrical Characteristics

Power supply: 28 VDC (supplied from PAIC I/O module)

Maximum lead resistance:

15 Ω (two-wire cable)

Compatible with cable lengths up to 300 m

Isolation:

Under externally powered transmitter configuration, AI channels provide point isolation of 1500 Vrms

5. Mechanical and Environmental Specifications

Terminal type:

High-density Euro-block terminal connectors

Operating temperature: −30 ℃ to +65 ℃

Dimensions: approx. 15 cm × 10 cm × 5 cm

Weight: approx. 0.64 kg

6. Key Functions

Provides field access for:

4–20 mA transmitter signals (temperature, pressure, flow, etc.)

Routes conditioned AI signals to the PAIC module

Supplies analog output signals to drive:

Actuators

Control valves

AO jumper configuration enables adaptation to different load requirements, suitable for:

Small actuators

Valve control applications

7. Typical Applications

Gas turbine auxiliary system control

Small compressors and fans

General industrial analog signal termination

Applications without mandatory redundancy requirements

Signal conditioning and wiring conversion in distributed control cabinets

8. Limitations and Selection Guidelines

Simplex configuration only

Does not support TMR or redundant architectures

Not suitable for high-safety or core turbine protection loops

Must be correctly matched to the PAIC module model

For externally powered transmitters:

Point isolation must be enabled

During installation:

Verify AO jumper settings (0–20 mA / 0–200 mA) to prevent signal mismatch or load damage

GE IS230SNAIH4A｜Simplex Analog Input Terminal Board｜