WAGO 750-362 Modbus TCP coupler
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 confirmed at the hardware-verified rung and at no rung below it.
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 |
|---|
| watchdog_time | 4096 | U16 | 1 | 100 ms |
| watchdog_status | 4102 | U16 | 1 | |
| led_error_code | 4128 | U16 | 1 | |
| led_error_argument | 4129 | U16 | 1 | |
| analog_outputs_size_bits | 4130 | U16 | 1 | bit |
| analog_inputs_size_bits | 4131 | U16 | 1 | bit |
| digital_outputs_size_bits | 4132 | U16 | 1 | bit |
| digital_inputs_size_bits | 4133 | U16 | 1 | bit |
| tcp_connections_count | 4138 | U16 | 1 | |
| firmware_version | 8208 | U16 | 1 | |
| series_code | 8209 | U16 | 1 | |
| coupler_controller_code | 8210 | U16 | 1 | |
| firmware_major_revision | 8211 | U16 | 1 | |
| firmware_minor_revision | 8212 | U16 | 1 | |
link settings as documented (unverified): TCP; FC 01,02,03,04,05,06,11,15,16,22,23
⚠ WARNING – DO NOT REMOVE OR REPLACE FUSED WHILE ENERGIZED! WARNING – DO NOT DISCONNECT WHILE ENERGIZED! WARNING – ONLY DISCONNECT IN A NON-HAZARDOUS AREA! — Starkest reads only; we never write a control register.
bench facts as documented (unverified)
| terminals | CAGE CLAMP |
| connector | 2 x RJ-45 |
| isolation | 500 V system/supply |
| max registers/read | 125 |
| response timeout | 60000 ms |
| model register | 0x2012 |
| firmware register | 0x2010 |
| power | 24 V DC (-25% ... +30%) |
| environment | Surrounding air temperature, operation 0 °C ... 55 °C, storage -25 °C ... +85 °C, Relative humidity Max. 5 % ... 95 % without condensation, IP20 |
| certifications | CE, UL61010-2-201, MSIP-REM-W43-PFC750, UL 121201 Cl I Div 2, ATEX, IECEx, ABS, DNV GL, PRS |
| doc revision | Version 1.0.2 |
field reports — community-sourced, unverified (checked 2026-06-11)
- Uncontrolled resource consumption in Series WAGO 750-3x/-8x products may allow an unauthenticated remote attacker to DoS the MODBUS server with specially crafted packets (CVE-2023-1150). [source]
- Improper Authentication vulnerability in WAGO 750-8XX and 750-362 series with FW version <= FW03 allows an attacker to change the settings of the devices by sending specifically constructed requests without authentication (CVE-2020-12506). [source]
- When a PLC stops or loses communication with the 750-362 coupler, outputs are kept in their last state by default unless the Modbus watchdog (Standard or Alternative) is explicitly configured on the coupler. [source]
- If the alternative watchdog is enabled on the coupler, outputs may turn ON and OFF repeatedly if the communication request interval from the master is not strictly lower than the watchdog timeout value. [source]
- confirmed: comms defaults and framing (TCP, function codes 1, 2, 3, 4, 5, 6, 11, 15, 16, 22, 23) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: certifications (CE, UL61010-2-201, MSIP-REM-W43-PFC750, UL 121201 Cl I Div 2, ATEX, IECEx, ABS, DNV GL, PRS) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: control warning (WARNING – DO NOT REMOVE OR REPLACE FUSED WHILE ENERGIZED! WARNING – DO NOT DISCONNECT WHILE ENERGIZED! WARNING – ONLY DISCONNECT IN A NON-HAZARDOUS AREA!) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: environmental specifications (Surrounding air temperature, operation 0 °C ... 55 °C, storage -25 °C ... +85 °C, Relative humidity Max. 5 % ... 95 % without condensation, IP20) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: physical specifications (2 x RJ-45, 500 V system/supply, CAGE CLAMP) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: power specifications (24 V DC (-25% ... +30%)) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: quirks (max_read_registers: 125, response_timeout_ms: 60000) — confirmed by WAGO 750-362 Manual V1.0.2
- confirmed: register map (watchdog_time @ 4096, watchdog_status @ 4102, led_error_code @ 4128, led_error_argument @ 4129, analog_outputs_size_bits @ 4130, analog_inputs_size_bits @ 4131, digital_outputs_size_bits @ 4132, digital_inputs_size_bits @ 4133, tcp_connections_count @ 4138, firmware_version @ 8208, series_code @ 8209, coupler_controller_code @ 8210, firmware_major_revision @ 8211, firmware_minor_revision @ 8212) — confirmed by WAGO 750-362 Manual V1.0.2
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.