I. Key Parameter Overview

Model: 07KT97; Part Number: GJR5253000R4270

Series: ABB AC31 / Freelance

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

Memory: Program 1MB / Data 512KB + 128KB retention area

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) 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 temperature 0～+55℃; Storage temperature -40～+85℃; Humidity 5%–95% RH (no condensation)

Mechanical: 35mm DIN rail; Dimensions 120×80×65mm; Weight approximately 450g

II. Simplified Usage Instructions Installation

Standard DIN rail, with a minimum 50mm clearance on all sides for heat dissipation, away from the frequency converter / heat source / strong vibration.

Full anti-static wristband operation to prevent static damage.

Connection (make sure to turn off the power)

Power supply: L+ → 24V+; M → 0V; PE → cabinet ground (≤ 4Ω), series 1A fuse.

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

DO: Prohibit direct drive contactor; inductive load with shunt diode.

Communication: Network cable / CAN / 485 use shielded wire; CAN head and tail 120Ω terminal resistor.

Power on and indicator lights

PWR (green): Always on = normal; flashing = voltage abnormal.

RUN (green): Always on = running; flashing = no program / stop.

ERR (red): Off = normal; flashing = minor fault; always on = serious fault.

Software and programming

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

Configuration: I/O range, communication IP / baud rate / address.

Download: Download after compilation is error-free; do not disconnect the communication port during operation.