Description
Technical Specifications
| Parameter | Value |
|---|---|
| Product model | 07KR31 |
| Order code | FPR3600227R1202 |
| Product family | Procontic CS31 / Advant Controller 31 |
| User program memory | 2 K-word EEPROM (non-volatile, no backup battery) |
| Integrated digital inputs | 12 × 24 VDC (addresses E 62,00 … E 62,11) |
| Integrated outputs | 8 × relay outputs, 2 A each |
| Communication ports | Programmable RS-232 (programming/HMI) + RS-485 CS31 system bus |
| Protocol support | Built-in MODBUS master/slave |
| High-speed counter | 10 kHz |
| Real-time clock | Yes |
| Power supply variants | 24 VDC / 120 VAC / 230 VAC |
| Power consumption | ≈ 5 W |
| Mounting / protection | DIN rail, IP20 (cabinet-internal) |
| Operating temperature | 0 °C to +55 °C |
| Dimensions / weight | ≈ 120 × 63 × 115 mm, ≈ 0.4 kg |
| Compliance | CE, IEC 61131-2 |
| Programming tools | 907 PC 331 (IEC 61131-3), AC31GRAF, TCZ handheld terminal |
| Lifecycle status | Legacy/obsolete — supplied as original MRO spare |
Role within the Procontic CS31 System
The CS31 is a decentralized automation system in which a central unit (such as the 07KR31) resides in the main control cabinet while remote I/O plug-in units are installed close to field sensors and actuators, linked by an RS-485 twisted-pair system bus. This topology can reduce wiring cost by up to 80 % compared with conventional centralized PLC schemes.
As the master node, the 07KR31 executes user control programs (typically ladder diagram or instruction list per IEC 61131-3), scans inputs, updates outputs, and supervises all slave modules on the CS31 bus. Each station can address up to 192 binary and 96 analog signals, and the bus can be extended up to 2 km using NCB bus amplifiers.
The 07KR31 is one of several central units in the CS31 range — alongside the 07 KT 31 / 07 KR 91, 07 KT 92, 07 KT 93, and 07 KT 94 — with the KR/KT suffix variants differing in power supply (DC vs. AC) and I/O integration, all sharing the same CS31 system architecture.
