Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 750-401 |
| Manufacturer | WAGO Kontakttechnik GmbH & Co. KG (WAGO, Germany) |
| Product Type | 2-channel digital input module |
| Series / Platform | WAGO I/O System 750 / 753 |
| Number of Digital Inputs | 2 |
| Total Number of Channels | 2 |
| Signal Type | Digital |
| Signal Voltage | 24 VDC |
| Input Characteristic | High-side switching |
| Input Filter (Digital) | 0.2 ms (RC noise-rejection filter) |
| Input Current per Channel (Signal 1) | typ. 4.5 mA |
| Voltage Range for Signal (0) | −3 … +5 VDC |
| Voltage Range for Signal (1) | +15 … +30 VDC |
| Sensor Connection | 2 × (2-wire, 3-wire, 4-wire) |
| Sensor Supply | 24 VDC |
| Input Data Width (Internal) | max. 2 bits |
| Supply Voltage (System) | 5 VDC via data contacts |
| Current Consumption (5 V System Supply) | 3.7 mA |
| Supply Voltage (Field) | 24 VDC (−25 … +30%) via power jumper contacts |
| Isolation | 500 V system / field |
| Indicators | 2 × green LEDs (A = DI 1, C = DI 2) |
| Incoming Power Jumper Contacts | 3 |
| Outgoing Power Jumper Contacts | 3 |
| Current Carrying Capacity (Power Jumper) | 10 A |
| Connection Technology | 8 × CAGE CLAMP® (inputs) |
| Connectable Conductor Material | Copper |
| Solid Conductor | 0.08 … 2.5 mm² / 28 … 14 AWG |
| Fine-Stranded Conductor | 0.08 … 2.5 mm² / 28 … 14 AWG |
| Strip Length | 8 … 9 mm / 0.31 … 0.35 inches |
| Width | 12 mm / 0.472 inches |
| Height | 100 mm / 3.937 inches |
| Depth | 69.8 mm / 2.748 inches |
| Depth from Upper Edge of DIN-Rail | 62.6 mm / 2.465 inches |
| Mounting Type | DIN-35 rail, fixed; pluggable connector |
| Color | Light gray |
| Housing Material | Polycarbonate; polyamide 6.6 |
| Fire Load | 1.211 MJ |
| Weight | 45.8 g |
| Protection Type | IP20 |
| Pollution Degree | 2 per IEC 61131-2 |
| Ambient Temperature (Operation) | 0 … +55 °C |
| Ambient Temperature (Storage) | −40 … +85 °C |
| Operating Altitude | 0 … 2000 m / 0 … 6562 ft |
| Relative Humidity (without condensation) | 95% |
| Vibration Resistance | 4 g per IEC 60068-2-6 |
| Shock Resistance | 15 g per IEC 60068-2-27 |
| EMC Immunity | per EN 61000-6-2 (marine applications) |
| EMC Emission | per EN 61000-6-4 (marine applications) |
| Permissible H₂S Concentration | 10 ppm at 75% relative humidity |
| Permissible SO₂ Concentration | 25 ppm at 75% relative humidity |
| Approvals | CE, ATEX (TÜV 07 ATEX 554086 X), IECEx, UL, EAC, KC, MSIP, ABS, BV, DNV GL |
Main Features and Advantages
High-side switching for direct sourcing-sensor compatibility: The WAGO 750-401 uses positive-switching inputs, meaning a 24 V potential applied to the input terminal sets that channel to “high”. This input topology aligns directly with the dominant industrial sensor output type — PNP sourcing sensors — so standard inductive proximity switches, photoelectric sensors and Hall-effect detectors connect without interface relays or signal inverters. The thresholds of −3 to +5 VDC for logic “0” and +15 to +30 VDC for logic “1” provide a wide noise margin, preventing the false switching that occurs when long sensor cables run parallel to VFD or motor feeders and pick up induced voltage.
Galvanic isolation at 500 V: The WAGO 750-401 maintains 500 V electrical separation between the field wiring and the internal system bus. This isolation barrier performs two distinct functions: it prevents ground potential differences between distant sensor locations and the control cabinet from degrading signal integrity, and it protects downstream controller electronics from field-side voltage transients. Because the field and system voltages are isolated, modules can be arranged in any combination when configuring the fieldbus node — there is no requirement to group them by potential, which simplifies rack population and makes later expansion straightforward.
0.2 ms response for high-speed signal capture: The defining performance parameter of the WAGO 750-401 is its 0.2 ms digital input filter — roughly fifteen times faster than the 3.0 ms filter used by the 750-400 and 750-430. This matters when the signal being captured is a narrow pulse, such as a bottle passing a photoelectric eye on a high-speed filling line, a registration mark on a web-fed printing press, or a cam pulse from a rotary indexing table. A 3 ms input will simply miss a pulse that is shorter than its own filter time, whereas the WAGO 750-401 captures it cleanly, provided the sensor itself responds quickly enough. The 0.2 ms RC filter still rejects the transient interference that would otherwise cause contact bounce or induced-noise false counts, so the speed does not come at the cost of noise immunity.
CAGE CLAMP® wiring and passive power distribution: All eight input terminals of the WAGO 750-401 use WAGO’s CAGE CLAMP® spring-pressure connection system, which accepts solid or fine-stranded copper conductors from 0.08 to 2.5 mm² without ferrules and requires no retightening after installation. The field supply is distributed through blade-and-spring power jumper contacts that engage automatically when modules sit adjacent on the DIN rail, eliminating daisy-chain wiring errors and reducing installation time in multi-module bus nodes. With three incoming and three outgoing power jumper contacts rated at 10 A, the WAGO 750-401 passes field power along the node without individual supply wiring to each module — though an additional supply module must be inserted if the 10 A limit would be exceeded.
Compact form factor and universal coupler compatibility: At 12 mm wide, 100 mm high and 45.8 g, the WAGO 750-401 occupies minimal panel real estate, allowing dense I/O racks without expanding cabinet footprint. It is compatible with all fieldbus couplers and controllers of the WAGO I/O System 750, including PROFIBUS, PROFINET, EtherNet/IP, EtherCAT, CANopen, DeviceNet, Modbus and CC-Link variants, so the same module can be specified regardless of the fieldbus chosen for the project.
