ABB XO08R2 (1SBP260109R1001) – 8‑Channel Relay Output Module for S900 Remote I/O

The ABB XO08R2, order code 1SBP260109R1001, is an 8‑channel relay output module designed for ABB S900 remote I/O. From my experience, it’s the practical choice when you need clean, isolated switching for solenoids, contactors, motor start interlocks, or on/off field devices while keeping the control system electrically protected. You might notice that plants using S900 appreciate how the XO08R2 drops into existing base units without reworking the whole marshalling cabinet—typically a half‑day changeover rather than a full shutdown.

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• Warranty: 365 days
• Lead time: 1 week if in stock; no more than 1 month at the latest
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Key Features

• 8 relay outputs – Well‑suited for driving solenoids, interposing relays, or discrete on/off devices.
• Galvanic isolation – Helps protect the controller and reduce ground‑loop risks across channels and the backplane.
• 2 A per channel (typical) – Adequate for most low‑power switching tasks in process and utility cabinets.
• Pluggable S900 format – Drops into the S900 base/terminal unit for fast replacement and tidy wiring.
• Status indication – Channel LEDs (on most S900 modules) simplify troubleshooting during commissioning.
• Fail‑safe behavior – Works with system watchdogs so outputs revert predictably on bus faults or power loss.
• Compatible field voltages – Relay contacts typically handle DC or AC loads; great for mixed device panels.

Technical Specifications

Application Fields

The XO08R2 is commonly used in process industries where discrete outputs must be rugged and electrically isolated:

• Oil & gas skids: energizing 24 V DC solenoids and valve actuators with reliable isolation.
• Water and wastewater: pump start/stop commands and valve control from central PLC/DCS.
• Power generation: turbine auxiliary permissives, dampers, and breaker interlocking circuits.
• Chemicals and pharma: on/off dosing valves and utility equipment with signal separation.
• HVAC and utilities: fans, dampers, and contactor coils where relay contact switching is preferred.

“Swapping in the XO08R2 on our S900 base took less than an hour. All eight channels lit up as expected and the solenoid chatter disappeared.” — Maintenance Supervisor, water treatment plant

Advantages & Value

• Reliability – ABB relay cards are known for long service life; contact ratings suit most plant loads.
• Compatibility – Seamless fit with S900 bases and head stations; minimal wiring changes during replacement.
• Cost control – Relay isolation reduces need for extra interposing relays in many cases.
• Serviceability – Pluggable format and front LEDs speed diagnostics and keep downtime low.
• Lifecycle support – Availability of S900 spares helps standardize across sites and simplify stocking.

Installation & Maintenance

• Cabinet environment: Install on a DIN‑rail S900 terminal base in a ventilated cabinet; keep within 0…55 °C and avoid condensation.
• Wiring: Use ferruled conductors, tighten to specified torque, and route inductive loads separately from low‑level signals. Add snubbers or flyback diodes on coils to extend relay life.
• Grounding: Maintain clean panel grounding; separation of field power returns typically improves noise immunity.
• Commissioning: Verify channel LEDs and function test each output. Set watchdog/fail‑safe behavior in the host controller.
• Maintenance: Periodically operate outputs under load to prevent contact oxidation; inspect terminals; clean dust build‑up. No calibration is required. Firmware updates are not applicable for relay cards.
• Spares strategy: Keep at least one XO08R2 per panel or per 64 outputs, depending on criticality.

Quality & Certifications

• Manufacturer quality system typically ISO 9001
• CE compliant; UL/CSA recognition commonly available for ABB S900 modules
• RoHS compliant in most regions
• Warranty: 365 days from shipment

If you’re standardizing on ABB S900 I/O, the XO08R2 (1SBP260109R1001) is a straightforward, dependable relay output choice. One thing I appreciate is how it keeps mixed AC/DC loads tidy without burdening the PLC outputs—especially in brownfield upgrades where every hour counts.