Description
ABB 07KR51 | Advant Controller 31 Basic Unit | 8DI / 6 Relay Outputs
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 07KR51 |
| Manufacturer | ABB |
| Controller Family | Advant Controller 31 |
| Product Type | Basic PLC / controller unit |
| Product ID — 24 VDC Version | 1SBP260010R1001 |
| Digital Inputs | 8 |
| Input Voltage | 24 VDC |
| Digital Outputs | 6 relay outputs |
| Relay Output Rating | Up to 250 VAC class, depending load/application |
| Power Variant | 24 VDC or 120/230 VAC versions |
| System Bus | CS31 |
| Mounting | DIN rail |
| Application | Industrial automation and process control |
ABB documentation shows the 07KR51 as an Advant Controller 31 basic unit with eight digital inputs and six relay outputs. The hardware documentation also shows 07KR51 as a basic unit that can work with local extensions and CS31 decentralized I/O.
About the “220VDC” designation
This needs to be handled carefully during procurement. ABB documentation identifies the 07KR51 power configurations as 24 VDC and 120/230 VAC; an ABB installation diagram specifically shows the AC version using a 120/230 VAC supply.
A current supplier page does use the description “07KR51 220VDC,” but the page provides no credible technical evidence for a 220 VDC supply variant. Therefore, do not connect 220 VDC to a 07KR51 based solely on that description.
Product Introduction
The ABB 07KR51 is an Advant Controller 31 basic PLC unit designed for industrial control applications. The 24 VDC version, identified by 1SBP260010R1001, integrates eight digital inputs and six relay outputs, while the controller can be expanded through local I/O extensions and the CS31 system bus.
For replacement work, the power-supply variant is the first item to verify. A 07KR51 intended for 24 VDC cannot be treated as equivalent to a 120/230 VAC version, even though both belong to the same 07KR51 controller family. The installed product ID should be checked against the cabinet wiring and nameplate before energizing the replacement.
07KR51-220VDC
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
The main risk with this part is variant confusion. The short designation “07KR51” covers controller units with different supply configurations, while some supplier databases add unsupported descriptions such as “220VDC.”
Typical Applications
- Machine Control — sequencing and discrete control using integrated digital I/O.
- Process Automation — small and medium control systems using AC 31 architecture.
- Distributed I/O — expansion through the CS31 system bus.
- Legacy Plant Automation — replacement of installed Advant Controller 31 hardware.
Technical Pitfalls to Avoid
- Do not treat “220VDC” as a verified specification.
ABB’s documented 07KR51 variants do not establish a 220 VDC supply version. Verify the complete Product ID and nameplate first. - Distinguish 24 VDC and 120/230 VAC versions.
The 24 VDC version is associated with 1SBP260010R1001, while 1SBP260011R1001 is documented as the 120/230 VAC version. - Check the output type.
The 07KR51 uses relay outputs, unlike the 07KT51 variant, which uses transistor outputs. ABB’s installation documentation clearly distinguishes the two. - Check the CS31 architecture before replacement.
The 07KR51 can operate as a basic unit with local extensions and as a master for decentralized CS31 I/O. Existing bus configuration and program compatibility therefore matter during replacement.
Related Products
- 07KT51 — Advant Controller 31 basic unit with transistor outputs rather than the 07KR51 relay-output arrangement.
- 07KR51 1SBP260010R1001 — 24 VDC version with 8 digital inputs and 6 relay outputs.
- 07KR51 1SBP260011R1001 — 120/230 VAC supply version of the 07KR51 family.
- 07CR41 — Related Advant Controller 31 family controller.
- 07CT41 — AC 31 basic controller family used with central/local extensions.
- XI16E1 — Digital input expansion unit used with AC 31 architectures.
- XO08R1 — Digital relay-output expansion unit for AC 31 systems.
- XC08L1 — Analog/digital expansion hardware used within the AC 31 family.
- 07KP96 — PDnet communication coupler for Advant Controller 31 architectures.
Procurement Note
If your stock label specifically says “07KR51 220VDC,” do not assume that this means the controller accepts 220 VDC. The safer identification is ABB 07KR51 Advant Controller 31, followed by verification of the complete Product ID.
For the documented 24 VDC version, the key identification is 07KR51 / 1SBP260010R1001. For the AC version, verify 1SBP260011R1001 and the cabinet’s 120/230 VAC wiring.
Procurement rule: match the complete ABB Product ID, supply voltage, relay-output configuration, firmware/program compatibility, and network arrangement. Do not purchase or energize a unit solely because a supplier has appended “220VDC” to the 07KR51 model name.
