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ABB 07CT41 The expandable independent central unit of the Advant Controller 31 (AC31) 40 series

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ABB 07CT41 The expandable independent central unit of the Advant Controller 31 (AC31) 40 series
May 28, 2026

ABB 07CT41 The expandable independent central unit of the Advant Controller 31 (AC31) 40 series

The 07CT41 is an expandable standalone central unit (integrated CPU+I/O) of the ABB Advant Controller 31 (AC31) 40-series, manufactured in Sweden. It belongs to the same series as the 07CR41 but features transistor outputs. Designed for small standalone control or local nodes in AC31 distributed architectures, it integrates a power supply, CPU, fixed I/O, and an RS-232 communication port. It supports up to 6 I/O expansion modules for applications with 14–110 I/O points. Now discontinued by ABB; available as new old stock, used, or refurbished units.

Description

Product Description
The 07CT41 is an expandable standalone central unit (integrated CPU+I/O) of the ABB Advant Controller 31 (AC31) 40-series, manufactured in Sweden. It belongs to the same series as the 07CR41 but features transistor outputs. Designed for small standalone control or local nodes in AC31 distributed architectures, it integrates a power supply, CPU, fixed I/O, and an RS-232 communication port. It supports up to 6 I/O expansion modules for applications with 14–110 I/O points. Now discontinued by ABB; available as new old stock, used, or refurbished units.
Model Number Interpretation

  • 07: Procontic 07 / AC31 series

  • CT: Controller with Transistor outputs

  • 41: 40-series, standard type, 24VDC power supply

    Model & Part Number

  • 07CT41: 1SBP260022R1001

    Technical Specifications

  • CPU: 8-bit processor, 1000 instructions in 1.2ms

  • Memory: 34kB (Flash EPROM for program, non-volatile RAM for data)

  • Power: 24VDC (19.2–30V), 5W consumption

  • Fixed I/O:

    • Digital inputs: 8 isolated 24VDC

    • Digital outputs: 6 transistors (24VDC/0.5A, PNP/NPN selectable)

    • Analog inputs: None (requires expansion modules)

  • Expansion: Up to 6 I/O expansion units

    • Max digital I/O: 104DI / 54DO

    • Max analog I/O: 51AI / 12AO

  • Communication: 1×RS-232 (programming, Modbus RTU, ASCII)

  • Operating temperature: 0°C～+55°C

  • Protection: IP20

  • Mounting: DIN rail, single-slot

  • Dimensions/Weight: Approx. 120×80×40mm; ~330g

    Interface & Indicators

  • Front: Removable terminal block (power, 8DI/6DO); LED status (PWR/RUN/FAULT)

  • Side: RS-232 communication port (DB9)

  • Back: Expansion bus connector (for I/O modules)

    Core Functions

  • Compact all-in-one design with fast-response, long-life transistor outputs for high-frequency switching loads

  • Flexible expansion with up to 6 I/O modules for small-to-medium applications

  • Standard RS-232 with Modbus/ASCII for third-party and host connectivity

  • Integrated real-time clock for time stamping and scheduled tasks

  • Self-diagnostics with LED status for fast fault localization

    Application Scenarios

  • Small control stations for ABB AC31/800xA/Advant OCS systems

  • Control of high-frequency devices (e.g., solenoid valves, contactors, small motors)

  • Standalone control for packaging machinery, electronic equipment, HVAC, water treatment

  • Industrial sites requiring fast response and long-life outputs

    Maintenance

  • Isolate power before wiring; separate high/low-voltage cables

  • Periodically clean dust and tighten terminals

  • Keep environment dry/ventilated, away from VFDs/high-power motors

  • Troubleshoot: power → I/O wiring → communication → expansion modules; do not open casing


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