Product Overview

The ABB 3AUA489002B4562​ is a 16-channel digital output module in ABB’s 3AUA “general-purpose I/O” family, designed to sit in an ABB AC500 PLC I/O rack or, per some BOM configurations, in a universal I/O bay compatible with AC800M-adjacent cabinets — the 3AUA489002 base is the “Swiss Army” DO card: 16 channels, field side 24 V DC, logic side fed from the rack backplane at 5 V DC (self-powered off the backplane; the 24 V field supply is external, landed on the module’s field-power terminals). Its job is the last inch of the control chain: take the 0/1 from the AC500 CPU (or AC800M via a compatible I/O bay) and drive something real — solenoid valve coil, intermediate relay, panel lamp, beacon, small contactor, pneumatic pilot, mag-lock, alarm horn. Sixteen points in one slender card, DIN or rack-plug form depending on the host mechanical, IP20 cabinet-interior, –20 °C to +70 °C (some docs –25 start), CE/UL/CSA.The wrinkle — and the reason this listing leads with a disclaimer — is the B4562​ suffix. The 3AUA489002 base number appears in ABB’s general I/O lineup with multiple B-suffixes that change the output stage: some B4562 builds are SPST relay output, 2 A/ch (resistive), ~10 ms operate/release, meant for valve-island pilots, panel relay coils, contactor aux — loads where you need the 2 A and don’t mind the mechanical relay life. Other B4562 builds (distributor docs conflict here) are transistor output, 0.5 A/ch, ~50 µs on / ~200 µs off, grouped 8 A per power segment — meant for high-cycle solenoid/pneumatic work (water-treatment dosing, packaging machine cam, conveyor stop-cylinder) where a relay would weld in six months. Both share the 3AUA489002B4562 order number in different regional/revison builds, and the only way to know which you’re holding is the removed unit’s label​ — relay version will say “Relay DO 2A” or show SPST symbol; transistor version will say “Transistor DO 0.5A” and show the sourcing/sinking diagram. This listing writes to the common core and treats the relay/transistor split as a “B4562-decided” variable — same suffix-discipline theme as PPC907BE101 (BE101 vs BE100), 1MRK000161 (AAR01), XC08L1 (L1 vs L2), 2ML-C42A (CC vs CA).For MRO planners on plants running ABB AC500 PLCs (packaged skids, water/wastewater, packaging lines, building-automation MCC bays) or on AC800M nodes that carry a “local DO expansion” bay next to the S800 remote racks, the ABB 3AUA489002B4562​ is the 16-point local DO card — smaller footprint and cheaper than adding another S800+MTU+CI just for “16 more relays for panel lamps and solenoid pilots.” It is not S800 (no ModuleBus, no CI801/CI840), not hot-swap in the S800 sense, and not redundant. If your BOM says “3AUA489002B4562” and the host is an AC500 rack, you’re in the right listing; if the host is AC800M and the BOM calls this in a “universal I/O” bay, confirm the bay mechanical accepts 3AUA cards (some AC800M cabinets mix S800 + a universal-I/O slot, others don’t).

Technical Specifications

Main Features and Advantages

16 DO in one slim card, relay or transistor decided by B4562.​ The ABB 3AUA489002B4562​ exists in two output-stage flavours under the same order number, and that’s not a bug — it’s ABB’s way of keeping one BOM base for “16 DO, 24 V field” and letting the B4562 tail pick relay (valve islands, contactor coils, panel relays — 2 A/ch, mechanical life, ~10 ms) vs. transistor (high-cycle solenoid, pneumatic pilot, packaging cam — 0.5 A/ch, µs speed, millions of cycles no weld). For the buyer this is the same “suffix discipline” lesson as the rest of this catalog: photograph the removed 3AUA489002B4562​ label, read whether it says “Relay” or shows the transistor sourcing diagram, then order. If your storeroom BOM just says “3AUA489002B4562” without noting relay/transistor, you’re one guess away from a DO card that drives solenoids fine but can’t hold a 2 A contactor coil, or vice versa.Backplane 5 V self-powered, field 24 V external.​ The logic side of the ABB 3AUA489002B4562​ draws off the rack backplane (5 V DC), so the AC500 CPU rack’s PSU (or the universal-I/O bay’s PSU) covers the logic — no extra logic supply wiring. The field side (the 16 DO drivers) needs an external 24 V DC landed on the module’s field-power terminals — typically pulled off the same 1KHL178012R0016A TRM01​ or the AC500 rack’s aux PSU that feeds the rest of the panel’s 24 V rail. That split (5 V logic / 24 V field) is standard ABB I/O practice and keeps field-fault current off the backplane.Opto-isolation channel(s) → backplane.​ Whether relay or transistor, the 3AUA489002B4562​ isolates the field side from the backplane logic — a shorted solenoid or a welded relay contact on Ch 8 doesn’t walk back and crash the AC500 CPU’s backplane bus. For panels where the 24 V field rail is exposed (terminal blocks open to electricians’ screwdrivers during outage), that isolation is the quiet differentiator between “one DO channel dead” and “whole rack rebooted.”LED per channel + module run/fault.​ Front face carries 16 channel LEDs (one per DO — on = channel driven) plus a module-level run/fault indicator. In a water-plant dosing skid where the AC500 cycles 16 solenoid valves on a timed recipe, the panel tech can confirm “did Ch 7 actually fire?” in three seconds without a laptop or a multimeter. That matters more on an AC500 skid (often unmanned, 40 km from main plant) than on a DCS rack where the faceplate already shows the DO state — but the LED is the field truth when the SCADA link is the thing you’re doubting.AC500-native, AC800M-compatible in some BOMs.​ The ABB 3AUA489002B4562​ is primarily an AC500 PLC I/O card (ABB’s mid-size PLC, sibling to the AC700F/AC800F Freelance and the AC800M DCS CPU). In some AC800M cabinet BOMs that carry a “universal I/O” bay (not S800, not ModuleBus — a local bay for panel lamps, ESD pushbutton LEDs, local solenoid pilots that don’t justify an S800 slice), the 3AUA card can appear. For MRO planners this means the 3AUA489002B4562​ may show up on two different storeroom requisition paths: “AC500 skid #3” and “AC800M node #2 local bay” — same SKU, different host. Photograph the label, note the host on the bin tag.Honest limitations.​ The ABB 3AUA489002B4562​ is not S800 (no Profibus/ModuleBus/hot-swap MTU), not HART-capable, not redundant, and not meant for >2 A inductive without de-rating (relay version: 2 A resistive, inductive de-rate per IEC 60947; transistor version: 0.5 A absolute, inductive even less). If your application needs 16 DO and 16 DI and 8 AI in one rack with Profibus to the DCS, step to S800 (AO810V2 / AI810 / DI810 / DO810 from earlier in this catalog). The 3AUA is the “local PLC I/O or small AC800M local bay” card, not the distributed DCS I/O play.