ABB 07CT42BB 07CT42 AC31 Expandable Stand-Alone PLC Central Unit
Official Full Product Identity 07CT42 Expandable Stand-Alone Central Unit, AC31 Series Compact Transistor Output PLC Unique ABB Factory Order Code: 1SBP260025R1001 Short Catalog Label: AC31 PLC 8DI/6DO-Transistor / 3AI, 34kB Program Memory, 24VDC Supply Official Core Function Description The 07CT42 is a DIN-rail compact standalone PLC controller from ABB’s legacy AC31 Advant Controller automation platform, engineered for high-speed continuous DC switching applications where mechanical relay wear is a critical failure risk. Integrated native I/O: 8 opto-isolated 24VDC digital inputs, 6 solid-state NPN transistor outputs (0.5A @ 24VDC), 3 analog input channels (2×±10V voltage signals, 1×PT100 RTD temperature sensor port) Expandable architecture: Supports up to 6 AC31 digital/analog I/O expan
Product Description
Official Full Product Identity 07CT42 Expandable Stand-Alone Central Unit, AC31 Series Compact Transistor Output PLC Unique ABB Factory Order Code: 1SBP260025R1001 Short Catalog Label: AC31 PLC 8DI/6DO-Transistor / 3AI, 34kB Program Memory, 24VDC Supply Official Core Function Description The 07CT42 is a DIN-rail compact standalone PLC controller from ABB’s legacy AC31 Advant Controller automation platform, engineered for high-speed continuous DC switching applications where mechanical relay wear is a critical failure risk. Integrated native I/O: 8 opto-isolated 24VDC digital inputs, 6 solid-state NPN transistor outputs (0.5A @ 24VDC), 3 analog input channels (2×±10V voltage signals, 1×PT100 RTD temperature sensor port) Expandable architecture: Supports up to 6 AC31 digital/analog I/O expan
Technical Specifications
| Brand | ABB |
|---|---|
| Model | 07CT42 |
| Category | Industrial Automation |
| Full Official Name | 07CT42 Expandable Stand-Alone Central Unit, AC31 Series Compact Transistor Output PLC |
| Unique ABB Factory Order Code | 1SBP260025R1001 |
| Short Catalog Label | AC31 PLC 8DI/6DO-Transistor / 3AI, 34kB Program Memory, 24VDC Supply |
| Integrated native I/O | 8 opto-isolated 24VDC digital inputs, 6 solid-state NPN transistor outputs (0.5A @ 24VDC), 3 analog input channels (2×±10V voltage signals, 1×PT100 RTD temperature sensor port) |
| Expandable architecture | Supports up to 6 AC31 digital/analog I/O expansion modules, scaling total system I/O up to 110 combined digital/analog points |
| Serial communication | Built-in RS232 port for PC programming, ASCII serial data transfer, Modbus RTU master/slave bus communication for SCADA system integration |
| Memory & data retention | 34kB flash non-volatile user program memory; battery-backed real-time clock (RTC) and retentive data storage for production recipes during power outages |
| Side-by-side comparison image | 07CT42 (transistor CPU) paired with 07CR42 (relay output variant) for physical size reference |
| Analog Inputs (AI) 3 total | 2×±10V voltage, 1×PT100 RTD temperature input |
| Digital input expansion | XI16E1 |
| Relay output expansion | XO08R1 |
| Mixed analog/digital combo modules | XC08L1, XM06B5 |
| Width | 120 mm |
| Height | 93 mm |
| Depth | 84 mm |
| Root Cause | 24VDC supply voltage outside tolerance range or shorted digital input field wiring; symptoms: permanent ERR light, program execution blocked. Fix: Isolate shorted sensor wiring, stabilize cabinet power supply voltage. |
| Drop-In 1 | 1 Wiring Compatible AC31 Series Replacements (Same Mounting, Terminal Layout) |
| CR42 | Relay output variant (6×2A relay DOs) for low-speed actuator loads; identical memory, I/O count and dimensions, lower cost for low-cycle logic applications |
| CT41 | Base transistor CPU model with identical I/O layout, smaller maximum expansion module capacity limit (4 modules vs 6 on 07CT42) |
| KT51 | Larger user memory, faster scan cycle, native RS485 Modbus interface, supports more expansion modules for complex automation systems |
| Channels | 2 channels |
| Mounting | DIN Rail |
| Mounting 2 | DIN rail |
| Speed | 34kB |
| Speed 2 | 4.4 kB |
| Origin | Germany / Original |
| Condition | New Original Factory Sealed |
| Warranty | 12 Months |
| Shipping | Global Delivery via DHL/FedEx/UPS |