Description

Key Technical Specifications

Parameter	Specification
Supply Voltage	24 V DC (-15% / +20%)
Program Memory	128 KB
Data Memory	128 KB
Digital Inputs	18 channels (24 V DC)
Digital Outputs	12 channels (24 V DC, 0.5 A max)
Communication Ports	1x RS-232/485, 1x Ethernet (optional via expansion)
Execution Speed	~0.3 µs per basic instruction
Max I/O Expansion	Up to 7 local extension modules
Operating Temp	0 °C to +55 °C (horizontal mount)
Storage Temp	-40 °C to +70 °C
Humidity	5% to 95% (non-condensing)
Protection Class	IP20

Product Introduction

The ABB 07CR41-C12 serves as the central processor for the AC500-eCo compact automation platform. It handles logic scanning, data handling, and direct control of machine sequences in packaging and material handling systems. Engineers select this unit for its balance of local I/O density and expandability without requiring a separate backplane.Field data indicates this controller maintains scan times under 10 ms even with complex math instructions enabled. Unlike generic micro-PLCs, the 07CR41-C12 supports full CoDeSys V2.3 programming environments, allowing for structured text and function block diagram development. This flexibility reduces migration time when upgrading from legacy 907 AC 110 systems.

Installation & Configuration Guide

Preparation (10 min)
Verify the supply voltage at the terminal block before connecting wires. Ensure the DIN rail is clean and free of metal shavings. Gather a small flathead screwdriver for terminal clamping. Check that the 24 V DC power supply can handle the inrush current (typically 3 A peak).Removal (5–10 min)
Disconnect all field wiring and communication cables first. Press the plastic release latch at the bottom of the module firmly. Slide the unit upward to disengage from the DIN rail hook. Do not pull by the wires; stress on terminals can crack the housing.Installation (10 min)
Hook the top of the module onto the DIN rail. Push the bottom firmly until the latch clicks into place. Connect the 24 V DC supply to terminals L+ and M. Wire digital inputs and outputs according to the sink/source schematic printed on the side label. Tighten terminals to 0.5 Nm torque.Power-On & Test (10 min)
Apply 24 V DC power. Observe the “RUN” LED; it should turn solid green after the boot sequence (approx. 2 seconds). If the “ERR” LED flashes red, check the DIP switch settings for communication mode. Connect a laptop via the service port to download the project. Verify I/O status by toggling field devices and watching the LED matrix.

Troubleshooting Quick Reference

Symptom	Probability	Action
No LEDs lit	High	Measure voltage at L+/M terminals. Check fuse in power supply.
Red ERR LED flashing	Medium	Check battery status (if equipped) or program checksum error. Re-download firmware.
Outputs not switching	Medium	Verify common terminal (1M/2M) wiring. Check for short circuit protection trip.
Communication timeout	Low	Confirm baud rate matches PC settings. Inspect RJ45/RJ11 connector pins for bending.
Intermittent resets	Low	Measure supply voltage dip during motor start. Add buffer capacitor if <20 V.

Dimensions, Mounting & Wiring Notes

Dimensions: 115 mm (H) x 90 mm (W) x 58 mm (D)
Mounting: Standard 35 mm DIN rail (EN 60715). Horizontal mounting preferred for heat dissipation.
Terminal Type: Removable screw terminals (5.08 mm pitch).
Wire Size: 0.2 mm² to 2.5 mm² (24–14 AWG) stranded copper.
Note: Strip wire insulation exactly 7 mm to avoid stray strands causing shorts between terminals. The terminal block is removable; label it before removal to prevent rewiring errors.

FAQ

Q: Can I use this 07CR41-C12 to replace an older 07CR22 model?
Yes, physically they fit the same space, but the memory architecture differs. You must recompile your CoDeSys project for the specific hardware definition of the 07CR41-C12. Direct binary upload often fails due to address mapping changes.Q: I lost the password for the PLC. Can you reset it?
We cannot reset user passwords remotely. This requires a full memory wipe via the hardware reset procedure, which erases the application program. You will need to re-download the logic from your backup files.Q: Is this unit new or refurbished?
This is New Surplus stock. It was never installed in a live panel but may have been stored in a warehouse. We perform incoming visual inspection and basic power-on tests to ensure functionality.Q: What happens if I connect 120 V AC to the input terminals?
The input circuitry will fail immediately. The 07CR41-C12 inputs are strictly 24 V DC. Overvoltage protection is limited; expect to replace the entire CPU module if this occurs.Q: Do you offer volume discounts for integrators?
Yes. Pricing tiers activate at 5 units and 10 units. Contact sales with your projected annual usage for a contract quote. Lead time for bulk orders (>20 units) is typically 3–5 business days.Q: Why is the Ethernet port not working on my unit?
The base 07CR41-C12 model includes an RS-232/485 port. Ethernet capability often requires a specific firmware version or an add-on communication coupler depending on the exact sub-version. Check the label for “ETH” designation or verify the part number suffix. (Correction: Some early batches required a separate FBP coupler for Ethernet, while later revisions integrated it. Verify your specific hardware revision against the manual).Q: How long does the backup battery last?
If equipped with a supercapacitor or battery option for real-time clock retention, expect 5–7 years at 25 °C. High ambient temperatures reduce this lifespan significantly. Replace the battery module proactively during scheduled maintenance every 4 years.