# 1. Quick Overview of Core Parameters

Model: 07KT98C; Part No.: GJR5253100R028

Series: ABB AC31 (Advant Controller 31)

Power Supply: 24V DC ±20% (18–32V DC), approx. 5W

Program/Data Memory: 2MB / 1MB + 256KB Retentive Memory

Integrated I/O

AI: 8 channels, 12bit (±10V/0–10V/4–20mA/PT100)

AO: 4 channels, 12bit (±10V/0–20mA)

DI: 8 channels, 24V DC

DO: 2 channels, 24V DC/0.5A (Transistor Type)

Communication

Ethernet: 10/100Mbps, Modbus TCP (Default IP: 192.168.0.1)

CANopen: Master Station, Default 125kbps

CS31: System Bus

RS232/RS485: Programming / Modbus RTU

Environment: Operating 0～+55℃; Storage -40～+85℃; Humidity 5%–95% RH (Non-condensing)

Installation: Standard 35mm DIN Rail; Dimensions 120×80×65mm; Weight approx. 500g

II. Simplified Operating Instructions

1. Installation

Fix it on the DIN rail, leaving a minimum of 50mm of space for heat dissipation on all sides, and keep it away from heat sources / strong vibrations.

Electrostatic protection: Use an anti-static wrist strap when operating.

2. Wiring (Power-off operation)

Power supply: L+ → 24V+; M → 0V; PE → cabinet ground (≤ 4Ω).

AI/AO: Shielded twisted pair, single-ended grounding; current signal series 250Ω resistor.

DO: Do not directly drive contactors; inductive loads should be connected with a shunt diode.

Communication: Use shielded cables for Ethernet/CANopen/RS485; CANopen: Connect 120Ω terminal resistor at both ends.

3. Power On and Indicator Lights

PWR (green): Always on = Normal; Blinking = Voltage abnormality.

RUN (green): Always on = Running; Blinking = No program / Stopped.

ERR (red): Off = Normal; Blinking = Minor fault; Always on = Serious fault.

4. Software and Programming

Software: Control Builder (IEC 61131-3: LD/FBD/ST).

Configuration: I/O type / range, communication parameters (IP / baud rate / address).

Download: Download after successful compilation; Do not disconnect the communication port while running.

5. Key Precautions

 Do not plug or unplug terminals / communication ports while powered on.

 Do not exceed AI range, overload DO (≤ 0.5A) or short circuit.

 Regularly back up programs / parameters; Tighten terminals and clean heat sinks monthly.