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Description
Application Scenarios
A regional refinery’s DCS room still runs a 2006-vintage ABB Harmony bay (INFI 90 migration path) hosting the crude-unit control racks. When the plant added a new naphtha-desalter train, the E&I team planned to squeeze a second Harmony rack into the same floor-standing cabinet — except the original cabinet shipped as a single-bay with only the two factory columns. The OEM’s “expand-a-cabinet” kit was quoting 14 weeks and a full cabinet swap recommendation. Instead, the team sourced two ABB P-HA-MCL-110RB000 columns, bolted them to the cabinet’s top and bottom flange (pairing with MCL cross-braces), and hung the new rack’s 19-inch rails on the pre-drilled holes — no re-drilling, no repainting, no cabinet swap. The harmony rack slid in with millimetre-level alignment, the PM8xx CPU and S800 I/O DIN rails sat coplanar, and the desalter controls were live three weeks ahead of the OEM schedule. The lead tech’s comment: “It’s a piece of steel. But it’s ABB’s piece of steel — and that hole pattern saved us a cabinet replacement.”
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | P-HA-MCL-110RB000 (PHAMCL110RB000) |
| Manufacturer | ABB Bailey Controls |
| Product Category | MCL Series Rack Mounting Column / Upright Support |
| Compatible Systems | ABB Harmony, INFI 90, Symphony, 800xA control cabinets |
| Column Height | 1100 mm (model code “110” = 1100 mm) |
| Cross-Section (approx.) | 200 mm (W) × 100 mm (D) |
| Material | High-strength alloy steel, surface galvanized or epoxy powder-coat |
| Static Load (module level) | ≥ 50 kg per column (module rail / DIN load, verified per ) |
| Cabinet-Level Rigidity | Up to 500–1500 kg system load when paired with MCL braces & base frame (per ) |
| Pre-Drilled Features | 19″ rack holes + MCL module hang-ear slots + base/top flange bolt holes |
| Compatible Rail | 35 mm DIN (EN 60715) + ABB S800 / Harmony dedicated carriers |
| Mounting Method | Cabinet top & bottom flange bolted (M6/M8), front/rear pair per bay |
| Straightness Tolerance | < 0.5 mm/m (factory-controlled, keeps DIN rails coplanar) |
| Working Temp. | –20°C to +60°C (storage –40°C to +85°C) |
| Protection | Anti-corrosion coating, indoor control-room grade (coastal plants: inspect periodically) |
| Net Weight (single) | ~8–15 kg depending on section thickness |
| Certifications | CE / UL / ISO 9001 (per cabinet system certification) |
Technical Principles and Innovative Values
Innovation Point 1 – ABB-Native Hole Pattern, Zero Field Drilling. The P-HA-MCL-110RB000 comes pre-punched with the exact 19-inch rack grid and MCL hang-ear pattern that Harmony/AC 800M/S800 carriers expect. Third-party rectangular tube or angle iron forces you to drill 30+ holes per column — and one off-by-2-mm hole ruins the DIN rail coplanarity. The OEM column snaps the whole bay into dimensional spec without a drill press.Innovation Point 2 – Integrated Grounding Path. Because the P-HA-MCL-110RB000 bolts to the cabinet top/bottom flange with conductive mating surfaces (zinc-on-zinc or epoxy-scraped at contact), the column itself becomes part of the cabinet’s low-impedance ground. For S800 I/O and 4–20mA/HART loops where shield drain integrity matters, this factory-controlled conductive path beats a field-rigged ground strap.Innovation Point 3 – Straightness <0.5 mm/m Factory-Controlled. The column is rolled and stress-relieved so the longitudinal deviation stays under half a millimetre per metre. Why it matters: when you hang three stacked S800 I/O carriers (each ~18″ wide, 3–4 kg loaded) on the MCL hang ears, a twisted column makes the top carrier sit 2 mm proud — enough to foul the cabinet door swing or the cable duct alignment. The P-HA-MCL-110RB000 keeps the whole rail row planar.Innovation Point 4 – Bay-Scalable with MCL Braces. One P-HA-MCL-110RB000 does nothing alone — it’s designed as a front/rear pair per bay, cross-braced top and mid with MCL brace members. That triangulation gives the cabinet its seismic/torque stiffness (cable-pull on DIN rails, tech leaning on open door, minor cabinet nudge). Skip the braces and the 1100 mm column will rack under load.
Application Cases and Industry Value
Case – Pharma API Suite (EU GMP). A biologics site running ABB 800xA on a Harmony-retrofit bay needed to add a second S800 I/O rack for a new purification skid. The original cabinet was a single-bay Harmony floor-stand — no room for expansion without widening. Rather than order a whole new cabinet (lead time 12 weeks, GMP re-validation on the DCS room layout), the validation team approved adding a second bay using two P-HA-MCL-110RB000 columns + MCL top/bottom braces + a new 19″ rack strip. Because the column’s hole pattern matched the existing bay’s, the new rack aligned without shimming, and the DCS room re-validation only needed a delta check on the new bay’s earth-bond (which the column’s native ground path passed first try). Saved ~€18k vs. new cabinet + re-validation.Case – Offshore Platform Utility DCS (South China Sea). Salt mist over 12 years had corroded the original cabinet uprights on one Harmony bay to the point where the S800 carrier hang ears were flaking coating. The E&I team swapped both front columns for P-HA-MCL-110RB000 during a turnaround window — the epoxy-coated finish on the replacement bought them another 10-year interval, and the swap took two technicians 90 minutes (diagonal-bolt sequence, torque to 25 N·m, done). The old columns went into the metallurgy waste stream; the new ones restored door-swing clearance that had been binding for two years.
