ABB PFUK108 YM110001-SH Relay Output Board – 250 V AC / 10 A, 24 V DC Coil, PFUK105 Companion

Product Overview

The ABB PFUK108 (YM110001-SH)​ is an 8-channel relay output board that forms the “dry-contact export” layer of ABB’s PF-series rack architecture — the Advant OCS / Lutec / PFV100 tension-control family that still runs paper-machine, film-line, and tandem cold-mill tension cabinets across global continuous-process plants. In a PF rack configuration, the compute layer is the PFUK105​ main CPU (or PFVK102/PFSK104 in some revisions), the digital input layer is the PFUK104​ DI terminal board, the tension-collection layer is the PFTK101A​ inside a PFTA102 wall cabinet — and the ABB PFUK108 (YM110001-SH)​ is the relay DO that takes the PFUK105’s logic decisions (“tension over-limit,” “belt break,” “cooling-fault,” “ESTOP pressed”) and turns them into physical relay closures that drive the field-side loads: audible-visual alarm beacons, fault-interlock contactors, emergency-stop latching circuits, and roller-system start/stop auxiliary coils. One ABB PFUK108 (YM110001-SH)​ handles 8 such loads per PF rack; larger tension cabinets stack two PF racks or pair the PFUK108 with a PFSK111 VDU for diagnostics aggregation.Electrically, the ABB PFUK108 (YM110001-SH)​ is a two-stage isolator: the PFUK105 sends a TTL/CMOS-level command over the PF rack’s parallel internal bus, the ABB PFUK108 (YM110001-SH)​ optocouples it, and the opto LED drives the 24 V DC coil of a small electromechanical relay (SPDT, single-pole-double-throw, on most sub-revs; some ship as SPST NO). The relay contacts are the field-facing side — 250 V AC / 5–10 A resistive, 30 V DC / 5–10 A — so the ABB PFUK108 (YM110001-SH)​ can directly switch a 24 V DC solenoid, a 230 V AC beacon, or a motor-contactor coil A2 without an intermediate interposing relay. Each of the 8 channels has its own green LED (on when coil energized, handy for “did the CPU actually fire the alarm or is the beacon burned out?”), its own blade-style fuse on the PF rack’s DO fuse bar, and the channel health is reported back to the PFUK105 which can push it to the PFSK111 VDU in the MCR. The ABB PFUK108 (YM110001-SH)​ draws its 24 V DC coil power from the PF rack’s PFSK101 PSU (18–36 V wide), while the contact side is fully floating — the field can feed the contact commons from anything up to 250 V AC / 30 V DC, isolated from the rack’s logic ground by the optocoupler + relay-mechanical gap.For maintenance teams on PFV100-based tension lines, the ABB PFUK108 (YM110001-SH)​ is a B-class critical slow-mover: the rack’s I/O站失效 means those 8 DO channels all go dark — if one of them is the “emergency stop latched” contact that holds the bridle drive enabled, the whole machine sections. Mechanical relays are wear items (∼100 k cycles, per typical ABB PFUK class; [web 2] reseller notes suggest 5–7 year preventive replacement in 3-shift plants), so the ABB PFUK108 (YM110001-SH)​ ages via contact pitting and coil insulation, not via semiconductor drift. Swapping it is a rack-pull: kill the PF rack PSU, release the PFUK108 guide, lift out, seat replacement, restore — the PFUK105 re-enumerates and the 8 DO offsets come back. No re-ladder needed because the DO mapping lives in the PFUK105 project, not on the ABB PFUK108 (YM110001-SH)​ (which is stateless — it’s just coils + contacts + LEDs). For spare-parts buyers, the rule is one cold-spare ABB PFUK108 (YM110001-SH)​ per 2–3 PF racks, and proactive refresh every 5–7 years on 3-shift lines before the first sticky contact shows up as a nuisance ESTOP.

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Description

 

Technical Specifications

Parameter Name Parameter Value
Product Model PFUK108 (Order Code: YM110001-SH)
Manufacturer ABB Ltd. (Sweden)
Product Type Relay Output Board / Switch Isolation Interface Board, PF Series Rack
Compatible System ABB Advant OCS / Lutec / PFV100 Tension-Control / Symphony Plus (as DO buffer)
Host Rack Modules PFSA103 (PSU), PFVK102 / PFSK104 (CPU), PFUK105 (Main CPU), PFUK104 (DI), PFSK111 (VDU)
Number of Relays 8 independent channels
Relay Type SPDT (single-pole double-throw C/O); some sub-revs ship SPST NO
Coil Voltage 24 V DC (backplane-fed, 18–36 V wide from PFSK101 PSU)
Coil Current ∼125 mA per relay typical
Contact Rating (Resistive) 250 V AC / 5–10 A; 30 V DC / 5–10 A (sub-rev dependent)
Contact Loop Supply AC 85–264 V / DC 100–240 V (field-side, isolated)
Isolation CPU logic ↔ field contact: optocoupler + relay mechanical, ESD/surge protected
Response Time ≤ 1 ms (coil energize to contact close)
Status Indicators 1× green LED per channel (ON = coil energized)
Protection Per-channel fuse (rack DO fuse bar); channel fault uploaded to PFSK111 VDU
Bus Interface PF rack parallel internal bus → PFUK105 main CPU
Logic Power 24 V DC (18–36 V), consumption ≤ 3.5–4.2 W (board only)
Operating Temperature -25 °C to +70 °C
Storage Temperature -40 °C to +85 °C
Humidity 5–95 % RH, non-condensing
Dimensions 140 × 100 × 35 mm (typical PF rack card profile
Weight 0.45 kg
Certifications CE, UL, CSA, IEC 60947-5-1

 

Main Features and Advantages

8-channel relay DO in PF rack single-width:The ABB PFUK108 (YM110001-SH)​ packs 8 independently fused relay outputs into the PF rack single-slot profile, which matters because a standard PFV100 tension cabinet might only have 12–16 rack slots total — PFUK105 (CPU) + PFUK104 (DI) + PFUK108 (DO) + PFSK111 (VDU) + PFSK109 comm + PFSK101 PSU = 6 slots, leaving headroom. If points is exactly right for a single tension-section cabinet: tension-overlimit horn, belt-break beacon, cooling-fault strobe, ESTOP latch contactor, roller-start perm contactor, roller-stop perm contactor, spare, spare. The ABB PFUK108 (YM110001-SH)​ covers that BOM cleanly without jumping to a second DO card.Opto + relay double isolation:The ABB PFUK108 (YM110001-SH)​ doesn’t just optocouple — it then adds a mechanical relay gap. The PFUK105 logic side (5 V / 24 V DC, grounded to the PF rack backplane) talks to the ABB PFUK108 (YM110001-SH)​ optocoupler input; the opto LED drives the 24 V DC coil; the coil pulls the SPDT contacts; the contacts carry the field 230 V AC / 24 V DC. Two isolation barriers between the PFUK105 CPU and a 230 V AC contactor coil that might kick 500 V back-EMF when dropped. That double-barrier is why the ABB PFUK108 (YM110001-SH)​ is preferred over a bare MOSFET DO for any load that isn’t purely 24 V DC — in a paper-machine wet-end cabinet where the beacon string shares a feeder with a 7.5 kW induction motor, the ABB PFUK108 (YM110001-SH)‘s opto+relay eats the back-EMF that would kill a solid-state DO.Per-channel LED + per-channel fuse + diagnostics upload:Each of the 8 relays on the ABB PFUK108 (YM110001-SH)​ has a green LED on the PF rack front facade — walk the cabinet, see which alarms fired. Each channel also lands on the PF rack’s DO fuse bar (blade style, typically 5 A per contact on a 250 V AC / 5 A relay, 10 A on the 10 A sub-rev). If a field load shorts (beacon internal filament-to-housing, contactor coil winding-to-ground), the blade pops, the LED stays unlit even though the PFUK105 commanded it, and the PFUK105 flags “DO Ch X Fuse Fail” up to the PFSK111 VDU in the MCR. That diagnostic chain — field fault → ABB PFUK108 (YM110001-SH)​ fuse pop → PFUK105 → PFSK111 VDU → DCS alarm — is what lets the control-room operator call the electrician with “beacon circuit A fuse popped, check the wet-end beacon string” instead of “PF rack DO bay dark, go look.”Single-channel fault doesn’t kill the other 7:Mechanical relays fail marginally — a contact can weld (common on DC inductive loads without flyback diode) or a coil can open. When one channel on the ABB PFUK108 (YM110001-SH)​ welds, the other 7 keep switching. The PFUK105 sees the mismatch (commanded ON but current sense / VDU feedback says contact didn’t drop) and logs “DO Ch X Stuck” — the plant keeps running on the remaining 7 while the electrician schedules a rack-pull. This “degraded mode” behavior is why the ABB PFUK108 (YM110001-SH)​ is B-class critical, not A-class: losing one channel is a maintenance ticket, losing all 8 (rack PSU dead, PFUK105 dead) is an outage. Stocking philosophy follows that — 1 spare per 2–3 racks, not 1-per-rack.Mechanical life and proactive replacement economics:Electromechanical relays on the ABB PFUK108 (YM110001-SH)​ are rated ∼100 k operations. On a 3-shift tandem-mill where the roller-start perm contactor fires once per coil (∼6×/hour during a 400 kt/month campaign = ~45000 ops/year), the ABB PFUK108 (YM110001-SH)​ contact set hits 100 k in ~2.5 years on that one channel — but the other 7 (horn, beacon, ESTOP) fire far less, so the board overall might last 5–7 years before the first sticky channel appears. Reseller PM guidance [web 2] suggests 5–7 year proactive refresh on 3-shift plants, which aligns with the mechanical-life math. The ABB PFUK108 (YM110001-SH)​ itself is cheap (~$200–500 in the spare channel) vs. the downtime of a stuck ESTOP contact on a 800 m/min film line — so proactive refresh beats reactive swap.Symphony Plus DO810 buffer use case (secondary application):Beyond the PFV100 native role, the ABB PFUK108 (YM110001-SH)​ also appears in Symphony Plus DCS cabinets as a DO810 buffer — the DO810 card’s 24 V DC solid-state output is vulnerable to field induced surges; putting a ABB PFUK108 (YM110001-SH)​ (or the PFUK family equivalent) between DO810 and the field contactor gives a sacrificial relay layer that protects the DO810. Not the primary identity, but worth noting for spare-parts buyers who see the ABB PFUK108 (YM110001-SH)​ on both PFV100 BOMs and Symphony Plus BOMs in the same plant.

Contact Us WhatsApp / Wechat：+86 18150087953
Phone：+86 18150087953
Email：sales@cxplcmro.com

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