Utility Relay AC-PRO-II trip unit

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire; word order and scaling are only confirmed at the hardware-verified rung.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

point	address (0-based)	type	scale	unit
alarm_status_code_0	7040	U16	1
alarm_code_1	7041	U16	1
current_phase_a	7042	U16	1	A
current_phase_b	7043	U16	1	A
current_phase_c	7044	U16	1	A
current_neutral	7045	U16	1	A
current_gf	7046	U16	1	A
voltage_a_n	7047	U16	1	V
voltage_b_n	7048	U16	1	V
voltage_c_n	7049	U16	1	V
voltage_a_b	7050	U16	1	V
voltage_b_c	7051	U16	1	V
voltage_c_a	7052	U16	1	V
power_kw_phase_a	7053	U16	1	kW
power_kw_phase_b	7054	U16	1	kW
power_kw_phase_c	7055	U16	1	kW
power_kva_phase_a	7056	U16	1	kVA
power_kva_phase_b	7057	U16	1	kVA
power_kva_phase_c	7058	U16	1	kVA
power_kw_total	7059	U16	1	kW
power_kva_total	7060	U16	1	kVA
power_factor_total	7061	U16	1	%
energy_kva_hrs	7062	U32BE	1	kVAh
energy_kw_hrs	7064	U32BE	1	kWh
kw_signs_lead_lag_pf	7066	U16	1
energy_kw_hrs_alt	7067	U32BE	1	kWh
frequency	7069	U16	1	Hz
negative_sequence_overvoltage	7070	U16	1	%
status	7071	U16	1
special_current_phase_a	7072	U16	1	A
special_current_phase_b	7073	U16	1	A
special_current_phase_c	7074	U16	1	A
special_neutral_current	7075	U16	1	A
special_gf_current	7076	U16	1	A
breaker_cycle_count	7090	U16	1
last_kwd	7901	U16	1	kW
last_kvad	7902	U16	1	kVA
peak_kwd	7903	U16	1	kW
peak_kvad	7904	U16	1	kVA
demand_period	7905	U16	1	s

link settings as documented (unverified): RTU

bench facts as documented (unverified)

terminals	+24 VDC Aux Power, Sluggish Breaker Limit Switch, GF Defeat, Programmable Relay Output, Breaker Harness (Neutral, Phase C, Phase B, Phase A Actuator)
termination	RS485 End of Line Termination switch (ON/OFF)
connector	Quick-Trip Connector, USB, RS485
serial register	7022-7026
firmware register	7027-7028
power	+24 VDC
certifications	UL, CE
doc revision	4.0
firmware applicability	v4.0.65

generated by gemini:gemini-3.5-flash · harvested from https://www.utilityrelay.com/PDFs/Product_Manuals/I-AC2-COMM.pdf (Utility Relay Co.); manual-faithful — the document's claims, panel risk: LOW — panel concurs, no field disagreements; proved interop-verified on 2026-06-10 · recorded 2026-06-10

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
interop-verified — Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

Have a device that isn't here? Upload its register map — generation is free, and the connector earns its rung by being proven, not claimed.

Need it proven on your own device? Hardware verification — if it doesn't verify, you don't pay.

Building a platform? License the verified library — machine-readable maps, firmware matrix, API access.