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Description
Application Scenarios:
A water treatment plant runs a series of 45 kW pump starters in a lineup of motor control centers. Each bucket has a 100-C72 contactor at the back of the compartment and an E3 Plus relay clipped directly onto it — which means the relay’s backlit LCD, its full-load current setting and its trip history are all sitting behind a bolted door, in a compartment that cannot be opened without arc-flash PPE and a qualified electrical worker under a permit. When a pump trips on jam at 2 a.m., night shift has no way to read why. They call an electrician, the electrician suits up, and a ten-second diagnostic becomes a forty-minute procedure — repeated across dozens of starters.This is the specific problem 193-ECPM3 solves. By moving the E3 Plus relay to the compartment door, 193-ECPM3 makes the display, the keypad and the reset function accessible from outside the enclosure, so an operator can read percent thermal capacity utilization, check the last trip cause and reset without opening a live compartment. The pain point is not protection capability — the relay already had that — it is accessibility, and the labour, PPE burden and deferred diagnosis that come with burying an intelligent device where nobody can see it.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 193-ECPM3 (E3 Plus Panel Mount Adapter) |
| Manufacturer | Allen-Bradley / Rockwell Automation — country of origin Mexico |
| Product Category | Mechanical mounting adapter and power-conduction accessory for E3 Plus solid-state overload relays (not a protection device) |
| Compatible Relays | Cat. No. 193-EC_E series — 193-EC1 (E3), 193-EC2 (E3 Plus, internal ground fault), 193-EC3 (E3 Plus, external ground fault), 193-EC4 (current monitoring), 193-EC5 (voltage monitoring) |
| Current Range | 18–90 A adjustment range — the “E” current code in the catalog number. The 5:1 adjustment ratio means one relay covers 18–90 A without a hardware change |
| Contactor Compatibility | IEC Bulletin 100-C60, C72, C85; NEMA Bulletin 500 Size 4 (via the 592-EC_E variants) |
| Voltage Rating | 690 V AC rated insulation (Ui); 690 V AC IEC / 600 V AC UL operating (Ue) — rating is set by the installed relay and contactor, not the adapter |
| Mounting Methods | Panel mount via screw fixing, plus 35 mm top-hat DIN rail mounting — both supported by the same adapter |
| Power Terminals | Line-side and load-side power conductor terminals on the adapter body, so motor conductors terminate at the panel-mounted assembly |
| Wire Size & Torque | Single conductor #12–#1 AWG, 35 in-lb; multiple conductor #12–#2 AWG, 35 in-lb. Metric: 4.0–35 mm² single, 4.0–25 mm² multiple, 4.0 N·m |
| Approximate Dimensions | Overall height ≈150.5 mm (5-15/16 in.), extending to ≈155.1 mm (6-7/64 in.) with the 193-EIMD interface module fitted; mounting hole Ø5.5 mm (7/32 in.). Rockwell publishes adapter dimensions as approximate and not for manufacturing use |
| Approximate Weight | ≈0.2 kg for the adapter alone (the attached 193-EC_E relay adds ≈1.23 kg) |
| Environmental | Governed by the installed E3 Plus relay: 0…50 °C operating, −40…+85 °C storage, per Rockwell’s electrical specification table |
| Material & Construction | Flame-retardant engineering plastic body with integral metal power terminals |
| Standards & Certifications | As part of the assembly: UL 508, CSA C22.2 No. 14, EN/IEC 60947-4-1; RCM (Australia); cULus listed (File E14840) |
| Commercial Data | UPC 611320526110; standard warranty 1 year; lifecycle status Discontinued — stop-sale date 31 October 2019 |
| Documentation | Technical data 193-TD012; user manual 193-UM002 (installation and dimensions) |
Technical Principles and Innovative Values:
- Innovation Point 1 — Decoupling the intelligence from the contactor: In a conventional starter the overload relay is mechanically wedded to the contactor, which means the device with the display and the diagnostics inherits the worst possible location in the cabinet. 193-ECPM3 breaks that coupling. The intelligent E3 Plus relay moves to the panel face where a human can read it, while the contactor stays on the backplate where its heat and its switching duty belong. The protection function is unchanged; the human-machine interface is transformed.
- Innovation Point 2 — The adapter carries the power, not just the bracket: This is what separates 193-ECPM3 from a generic mounting plate. It incorporates line-side and load-side power conductor terminals rated for the full 18–90 A path, so the adapter is an active part of the power circuit rather than a passive standoff. That is also why the terminal torque specification is a genuine 35 in-lb — these are power terminations, and the adapter is engineered for the thermal and mechanical duty of carrying motor current continuously.
- Innovation Point 3 — Alignment preserved across a remote mount: Remote-mounting an overload relay introduces a real failure mode: if the relay is not held in precise relationship to the contactor’s trip actuator and reset mechanism, the assembly can fail to trip or fail to reset — a silent, dangerous defect. 193-ECPM3 is engineered with positive alignment and latching geometry so the relay seats in a defined position and the mechanical relationship to the actuator stays intact. The adapter solves the mounting problem without introducing a new one.
- Innovation Point 4 — Dual mounting from a single part number: 193-ECPM3 supports both drilled-panel screw mounting and 35 mm top-hat rail mounting. For a panel builder this removes a decision from the bill of materials and removes custom bracket fabrication from the scope; for a field retrofit it means the same part works whether the target is a door, a backplate or an existing rail. Standardization across a fleet is worth more than the part itself.
- Innovation Point 5 — Sized deliberately, not universally: The ECPM family is split by frame — 193-ECPM1 for the B frame (100-C09…C23), 193-ECPM2 for the D and Z frames (100-C30…C43), 193-ECPM3 for the E frame (100-C60…C85). That deliberate segmentation is why 193-ECPM3‘s terminals are rated #12–#1 AWG at 35 in-lb rather than the #14–#8 AWG at 16 in-lb of the smaller ECPM1. The consequence for buyers is straightforward and worth stating plainly: the suffix must match the frame, because a mechanically similar adapter with undersized terminals is a heat source waiting for a load.
- Innovation Point 6 — A twenty-year installed base that refuses to disappear: Because E3 and E3 Plus relays were specified across water, wastewater, mining, petrochemical and material-handling installations for two decades, 193-ECPM3 sits in a very large number of operating MCCs. Rockwell discontinued it on 31 October 2019 and lists no like-for-like replacement category — which is precisely why verified new-surplus stock has strategic value. A plant that needs one to complete a spare bucket or restore a damaged door assembly often has no alternative to the secondary market.
