Product Core Brief
- Model: XO08R1-B4.0 (XO 08 R1, 1SBP260101R1001)
- Brand: ABB
- Series: CS31 digital extension modules
- Core Function: Adds eight relay outputs to an ABB CS31 system for switching loads and remote status signaling.
- Product Type: Relay Output Extension Module
- Key Specs: 8 relay outputs | 250 V AC / 2 A | 24 V DC external supply | CS31 system bus
- Condition: New Original / New Surplus
Product Introduction
ABB XO08R1-B4.0 is a CS31 digital extension module that provides eight relay outputs for industrial control panels. It connects to an ABB CS31 system bus and lets a central controller switch external devices such as alarms, indicators, contactors, and auxiliary relays.
The replacement module supports 250 V AC / 2 A relay outputs and requires an external 24 V DC supply. It is typically used where discrete switching is needed without adding a full local PLC rack. Verify the exact revision and bus address before commissioning.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Order Code | XO08R1-B4.0 / XO 08 R1 / 1SBP260101R1001 |
| Module Type | Digital extension, relay output |
| Output Channels | 8 relay outputs |
| Output Rating | 250 V AC, 2 A per relay |
| Supply Voltage | External 24 V DC |
| Bus Interface | CS31 system bus |
| Mounting | DIN-rail / panel-mounted extension |
| Typical Use | Discrete output switching, remote I/O |
| Supply Status | Legacy / New Surplus |
Quality Control Process (Dynamic)
- Visual inspection: Check relay housings, terminal blocks, bus connectors, and PCB for heat marks, oxidation, or mechanical stress.
- Continuity check: Use a Fluke multimeter to verify relay contact continuity and insulation between output channels.
- Output test: Energize each relay individually and confirm NO/NC switching under no-load conditions.
- Load verification: Apply a resistive test load within rating and measure contact voltage drop for abnormal heating.
- Bus validation: Confirm CS31 communication, module addressing, and correct output mapping before final packing in anti-static packaging.
Replacement Pitfall Guide (Dynamic)
❗ Revision confusion. XO08R1 appears as XO 08 R1, XO08R1-B04, XO08R1-B4.0, or XOO8R1-B04. Contact layout and firmware behavior may differ across revisions.
❗ Not a transistor output module. XO 08 R1 is relay-based. Substituting it with XO 08 Y1 or XC 08 L1 changes switching characteristics and load compatibility.
❗ CS31 addressing mismatch. The module must be correctly addressed on the CS31 bus. Wrong addressing causes missing outputs or bus faults.
❗ Relay load limits. 250 V AC / 2 A is the per-relay limit. Inductive loads such as contactor coils may need flyback diodes or snubbers.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| XO08R1-B4.0 (1SBP260101R1001) | XO 08 R1 (1SBP260101R1001) | Direct | Same CS31 relay output module; confirm revision and bus address. |
| .0 | XO 08 R2 | Needs Adaptation | Different relay configuration; wiring and mapping must be verified. |
| .0 | XO 08 Y1 / XC 08 L1 | Not Interchangeable | Transistor outputs; not a direct relay replacement. |
| .0 | ABB XIO-08 | Not Interchangeable | XIO-08 belongs to the RMC/flow-computer family, not CS31. |
Benchmark notes:
- 8 relay outputs, 250 V AC / 2 A, external 24 V DC supply.
- CS31 system-bus digital extension for ABB series 40/50 central units and compatible remote stations.
