ABB 07KT95 (AC31 Compact CPU) compact, cost-effective CPU in the Advant Controller 31 (AC31) / Procontic CS31 series
Description
Product Introduction
Model Explanation
07: Procontic 90 / AC31 series identifier.
KT: CPU with DC transistor outputs.
95: Compact performance grade with reduced I/O count.
No suffix: Standard version (no ARCNET/PROFIBUS onboard).
Technical Parameters
Processor: 16-bit Motorola 68HC11.
Power Supply: 24 VDC (18–30 VDC), ≤10 W, reverse polarity protection.
Memory: 120 KB Flash (program); 2.2 KB non-volatile RAM (data).
Onboard I/O:
DI: 12 × 24 VDC (sink/source), electrically isolated.
DO: 8 × transistor 24 VDC/0.5 A, short-circuit protected.
AI: 4 × 12-bit (0–10 V / 4–20 mA).
AO: 2 × 12-bit (0–10 V / 4–20 mA).
High-Speed Counter: 1 × 20 kHz (hardware).
Operating Temperature: 0°C to +55°C.
Protection Class: IP20; standard PCB coating.
Dimensions: 160 × 100 × 95 mm; weight ≈0.6 kg.
Certifications: CE, UL, CSA, RoHS.
Interface and Communication Configuration
COM1: RS-232 (programming, HMI, ASCII).
COM2: RS-485 (Modbus RTU master/slave, CS31 bus).
CS31 System Bus: Up to 31 remote I/O slaves.
LED Indicators: PWR, RUN, ERR, TX, RX.
Programming Software: Control Builder AC31, 907 PC 331.
Core Functions
Compact Control: Optimized for small machines and standalone applications with minimal I/O.
Mixed I/O Handling: 12DI/8DO + 4AI/2AO covers basic analog/digital control needs.
Distributed I/O Master: CS31 bus expands to remote modules for system scalability.
20 kHz High-Speed Counter: Processes encoder/pulse signals for simple motion tasks.
Modbus RTU Communication: Connects to HMIs, sensors, and other PLCs via RS-485.
Self-Diagnosis: LED status lights enable quick fault detection and troubleshooting.
Application Scenarios
Small Factory Automation: Packaging machines, conveyor systems, assembly stations.
Building Automation: HVAC, lighting control, and facility monitoring.
Water Treatment: Small pumping stations, filtration systems, and chemical dosing.
OEM Machinery: Standard machine control for plastics, textiles, and food processing.
Distributed I/O Systems: Remote control nodes in larger AC31-based plants.
Usage and Maintenance Instructions
Installation: Mount on standard 35 mm DIN rail; ensure adequate ventilation and avoid extreme temperatures.
Wiring: Use shielded twisted-pair cables for RS-485/CS31; single-point grounding of shields.
Program Backup: Regularly back up user programs via Control Builder to prevent data loss.
Preventive Maintenance: Inspect terminals and LEDs annually; keep enclosures clean and dry.
Replacement: Compatible with 07KT94/94K/97 for program portability; direct swap without rewiring.
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