The ABB 07CR41 is a powerful, expandable central unit for industrial automation. It supports binary, analog, and temperature inputs, relay outputs, RS232 MODBUS communication, and high-speed counters. Ideal for machine automation, workshops, and distributed industrial control.
1. Overview
The ABB 07CR41 is a standalone central units designed for automation applications with 14 to 110 inputs/outputs. These units provide an easy-to-use system for both beginners and experienced users.
- Supports MODBUS and ASCII communication interfaces.
- Can integrate with additional automation systems.
- Central units manage sensor data and control actuators.
- Expandable with up to 6 binary or analog extension units.
Presentation / Operation
4. References
Central Units
40 Series
| Products |
Description |
References |
| 07 CR 41 24VDC |
Extensible stand-alone central unit, with 8 isolated inputs 24V DC and 6 incorporated relay outputs (250V AC / 2A). RS232 interface for programming or ASCII or MODBUS® communication. 24V DC power supply. |
1SBP260020R1001 |
| 07 CR 41 120/230VAC |
Extensible stand-alone central unit, with 8 isolated inputs 24V DC and 6 incorporated relay outputs (250V AC / 2A). RS232 interface for programming or ASCII or MODBUS® communication. 24V DC power supply output to power inputs. 120/230V AC power supply. |
1SBP260021R1001 |
| 07 CT 41 24VDC |
Extensible stand-alone central unit, with 8 isolated inputs 24V DC and 6 incorporated transistor outputs 24V DC / 0.5A. RS232 interface for programming or ASCII or MODBUS® communication. 24V DC power supply. |
1SBP260022R1001 |
50 Series
| Products |
Description |
References |
| 07 KR 51 24VDC |
Extensible central unit with CS31 bus, with 8 isolated inputs 24V DC and 6 incorporated relay outputs (250V AC / 2A). RS232 or RS485 interface for programming or ASCII or MODBUS® communication. 24V DC power supply. |
1SBP260010R1001 |
| 07 KR 51 120/230VAC |
Extensible central unit with CS31 bus, with 8 isolated inputs 24V DC and 6 incorporated relay outputs (250V AC / 2A). RS232 or RS485 interface for programming or ASCII or MODBUS® communication. 24V DC power supply output to power inputs. 120/230V AC power supply. |
1SBP260011R1001 |
| 07 KT 51 24VDC |
Extensible central unit with CS31 bus, with 8 isolated inputs 24V DC and 6 incorporated transistor outputs 24V DC / 0.5A. RS232 or RS485 interface for programming or ASCII or MODBUS® communication. 24V DC power supply. |
1SBP260012R1001 |
Programming Software
| Products |
Description |
References |
| ABB AC31GRAF |
Programming software for central units, under Windows® 3.x, NT, and 95/98. English version. |
1SBP260250R1001 |
| ABB AC31GRAF |
Programming software for central units, under Windows® 3.x, NT, and 95/98. French version. |
1SBP260251R1001 |
| ABB AC31GRAF |
Programming software for central units, under Windows® 3.x, NT, and 95/98. Italian version. |
1SBP260252R1001 |
3. Technical Specifications
3.1 General Characteristics
| Feature |
Specification |
| Incorporated Binary Inputs |
8 |
| Incorporated Binary Outputs |
6 (Relay Outputs) |
| Incorporated Analog Inputs |
3 (2 Voltage ±10V, 1 Temperature) |
| Max. Expansion Units |
6 |
| Max. Binary Inputs (with expansion) |
104 |
| Max. Binary Outputs (with expansion) |
54 |
| Max. Analog Inputs (with expansion) |
51 |
| Max. Analog Outputs (with expansion) |
12 |
| Interfaces |
RS232 (Programming, MODBUS, ASCII) |
| User Program Memory (Flash EPROM) |
17,000 words (typical: 8.5k Instructions) |
| Data Backup (Battery) |
20 days at 25°C |
| Weight |
400g (24VDC), 800g (120/230VAC) |
3.2 Execution & Programming
| Feature |
Specification |
| Execution Time for 1kB Code |
0.4ms (100% binary), 1.2ms (65% binary, 35% words) |
| Timers |
42 Simultaneously (1ms to 24 days) |
| Counters |
Unlimited (-32,767 to +32,767) |
| High-Speed Counters |
1 incremental encoder (5kHz), 2 standalone counters (7kHz) |
| Interrupts |
2 alarms (250μs delay), 1 cyclic (1ms to 2s) |
| Step Motor Output Frequency |
10Hz to 2.66kHz |
| Clock Drift |
4.3 min/month (at 25°C) |
| Programming Software |
AC31GRAF (IEC 1131-3) |
| Programming Languages |
FBD/LD (Function Blocks, Ladder Diagram), IL (Instruction List), SFC (Sequential Function Chart) |
3.3 Power Supply
| Feature |
Specification |
| Power Supply (Nominal) |
24V DC / 120-230V AC |
| Power Consumption (Typical) |
120mA (central unit alone), 400mA (max configuration) |
| Polarity Reversal Protection |
Yes (DC model only) |
| Isolated 24V DC Power for Inputs |
Yes (120/230V AC model only) |
| Power Dissipation |
5W (6W for 07CT42), 10W for 120/230V AC model |
3.4 Inputs and Outputs
| Feature |
07CR42 |
| Binary Inputs |
8 (24V DC, PNP/NPN) |
| Binary Outputs |
6 Relay Outputs (2A, 250V AC) |
| Analog Inputs |
3 (2 Voltage ±10V, 1 Temperature) |
| Relay Isolation |
1500V AC |
| Output Switching Frequency |
<1Hz (resistive load), <0.2Hz (inductive, lamp loads) |
| Short Circuit Protection |
External Fuse Required |
| Surge Voltage Protection |
External Protection Recommended |
3.5 Analog Inputs
| Feature |
Specification |
| Number of Analog Inputs |
3 (2 Voltage, 1 Temperature) |
| Voltage Range |
±10V (Max ±30V) |
| Resolution |
11-bit + sign (Voltage), 12-bit (Temperature) |
| Temperature Sensor Support |
PT100, PT1000, PTC, NTC |
| Sampling Rate |
2.5ms |
| Cable Length |
50m (Shielded) |
3.6 Communication & Interface
- RS232 Serial Port: Programming, MODBUS, ASCII.
- No built-in CS31 Interface.
- MODBUS Compatibility for extended industrial automation.
4. Diagnosis & Protection
- Error Diagnostics: Via Technical Manual AC31.
- User Program Protection: Password-protected.
- Backup & Data Storage: Flash EPROM, SRAM with battery backup.
5. Electrical Isolation
- 07CR42 (120/230V AC): High voltage isolation between power supply and inputs/outputs.
- 07CR42 (24V DC): Isolated circuits for protection.
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