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Help CenterABB DSSR122 (48990001-NK) – Solid-state Relay Output Module for ABB Bailey INFI 90/Harmony Systems
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Warranty: 365 days
Delivery: 1 week if in stock; no more than one month at the latest
Payment: 50% advance payment; full payment prior to delivery
Express options: FedEx, UPS, DHL
| Brand / Model | ABB DSSR122 |
| Part Number | 48990001-NK |
| System Platform | ABB Bailey INFI 90 / Harmony rack-mounted I/O |
| HS Code | 8537.10 (Boards/panels for electric control, ≤1000 V) |
| Power Requirements | Backplane powered (typical 5 VDC logic from rack); field-side load supply commonly 24 VDC depending on wiring scheme |
| Operating Temperature | Typically 0 to +55 °C (industrial control cabinet environment) |
| Signal I/O Types | Solid-state (SSR) digital outputs; optically isolated; front status LEDs (varies by revision) |
| Communication Interfaces | Backplane interface within the INFI 90/Harmony rack; no external serial/Ethernet port on the module front in most cases |
| Installation Method | Rack-mounted plug-in card; mates with ABB terminal units/wiring kits in a standard cabinet |
You’ll typically find the DSSR122 in plants that prefer silent, fast, and durable switching for discrete loads:
Power generation – turbine auxiliaries, breaker permissives, trip logic
Oil & gas – ESD loops, valve actuation, burner management I/O interfaces
Chemicals & petrochemicals – interlocks, alarms, and motor control signaling
Metals & mining – conveyor interlocks, lamp stacks, solenoid control
Water & wastewater – pump station permissives, panel indications
Reliability – Solid-state outputs typically improve uptime and reduce nuisance failures from contact wear.
Compatibility – Designed for ABB Bailey INFI 90/Harmony racks, so retrofits are straightforward and low risk.
Maintenance savings – Fewer mechanical parts to service; quicker diagnostics via front LEDs.
Lifecycle support – We help with cross-references, firmware notes (if applicable), and wiring kit selections to keep your cabinet standard.
Cabinet environment – Install in a clean, ventilated, and dry control cabinet. Keep ambient within the typical 0…55 °C range and avoid vibration where possible.
Wiring – Use the matching ABB terminal unit/wiring kit for the slot. Separate field power and signal cables; observe polarity on DC loads.
ESD & handling – Treat the module as an ESD-sensitive device; insert and extract using approved procedures with the rack powered as per site practice.
Protection – Provide external fusing for field supplies and follow site standards for grounding and shielding.
Routine checks – Visual check of status LEDs and terminal torque; clean dust with dry air; review firmware or revision notes if your site tracks module revisions.
Manufactured under ISO 9001 quality systems (ABB production)
Typically CE-marked for industrial EMC and safety
UL/CSA considerations may apply at the system level when installed in listed panels
RoHS compliance can vary by vintage; many units supplied today meet current RoHS requirements
Standard warranty: 365 days
ABB Bailey rack/chassis slot for INFI 90/Harmony
Matching terminal unit/wiring kit for DSSR-series outputs
Backplane power supplies appropriate for your rack population
Shielded cable sets and labeled ferrules for field terminations
Customer note: “We swapped a mechanical DO card for DSSR122 during a boiler outage. The faster switching and zero contact wear solved our lamp failures—we haven’t touched that loop since.” This seems to be the typical feedback we hear after moving to solid-state outputs.
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