BECKHOFF EP23xx series IP67 protection level EtherCAT Box digital input/output module

Product positioning

BECKHOFF EP23xx series EtherCAT Box module specification manual (version 3.102026-03-31), aimed at automation engineers, fully explains the model, parameters, wiring, installation, debugging, safety specifications, and certification information of IP67 protection level digital input/output modules.

Core positioning: Distributed digital I/O installed directly on industrial sites without the need for control cabinets.

Product series and model classification

1. Fixed I/O type

Model Channel Interface Output Current Input Filter

EP2308 4-in-4-out M8/M12 0.5A 3ms

EP2318 4-in-4-out M8/M12 0.5A 10 μ s

EP2328 4-in-4-out M8/M12 2A 3ms

EP2316 8-in-8-out ZS2001/D-Sub 0.5A 10 μ s

2. Configurable I/O type (any channel for input/output)

Model Maximum Channel Interface Output Current Filter

EP2338 8 M8/M12 0.5A 10μs/3ms

EP2339 16 M8/M12/ZS2001 0.5A 3ms

EP2349 16 M8/M12 0.5A 10μs

3. Special models

EP2339-01211:16 channel, grounded switch type (NPN output/input)

EP2338-2002: 8-channel, dual independent power supply (US/UP electrical isolation)

Core electrical parameters

power supply system

US: Control/Logic/Sensor Power Supply, 24V DC (-15%~+20%)

UP: Output driver power supply, 24V DC (-15%~+20%)

Maximum current: M8 interface 4A, 7/8 “interface 16A

Electrical isolation: 500V

Digital input

Signal level: 0: -3~+5V; 1:+11~+30V

Input current: 6mA

Filtering time: 10 μ s (high-speed)/3ms (standard)

Maximum wiring length: 30m

Digital output

Output type: 24V DC

Single channel current: 0.5A (EP2308/18/16/38/39); 2A（EP2328）

Total current: maximum 4A

Protection: short circuit, reverse polarity, overload

Switching time: 50~300 μ s

Structure and Installation

Protection level: IP65/IP66/IP67 (correct plug installation required)

housing dimensions

Narrow body: 126 × 30 × 26.5mm

Wide body: 126 × 60 × 26.5mm

Installation method

Fix directly with M3/M4 screws

Suitable for ZS5300 series installation guide rail

Grounding requirements: EP23xx-002x/0042 must be functionally grounded to ensure low impedance connection.

Interface specifications

EtherCAT: 2 × M8/M12 (4-pin, A/D encoding), green connector

Power supply: M8 or 7/8 “, black connector

M8：1=US，2=UP，3=GNDS，4=GNDP

7/8 “: 1=GNDP, 2=GNDS, 3=Ground, 4=US, 5=UP

I/O connectors: M8 (3/4 pin), M12 (5 pin) ZS2001、D-Sub25

Function and fault handling

Configurable channel: EP2338/39/49 No need to set, output automatically reads back to input image

Security function (EP2316 exclusive)

When there is a network failure, the output enters a safe state (can be set to OFF/ON)

Short circuit can be set to single channel shutdown or full shutdown

Diagnostic function

LED: US/UP power supply, RUN, L/A link, channel status

Process data includes synchronization errors, channel failures, and activation of safety status

Certification and Environmental Conditions

Certification: CE, cURus, ATEX/UKEX, IECEx

Explosion proof: II 3G Ex ec IIC T4 Gc; II 3D Ex tc IIIC T135℃ Dc

environment

Working temperature: -25~+60 ℃ (UL: -25~+55 ℃); Explosion proof: 0~+55 ℃)

Vibration: 5g (5~500Hz); Impact: 35g, 11ms

EMC：EN 61000-6-2 / EN 61000-6-4

8、 Debugging and Configuration

Integrated into TwinCAT, supporting CoE

Factory Recovery: CoE 1011:01 Write 1684107116

Inductive loads require built-in freewheeling diodes to absorb the reverse peak

Key issues

Question 1: Who is the dual power supply for the US and UP of the EP23xx module supplied to, and what are the advantages of separate power supply?

answer:

US: Provides power to EtherCAT bus, processor, digital inputs, and sensors.

UP: Power the digital output driver.

Advantages: Output faults/power outages do not affect the bus and input, achieving safe shutdown of output and improving system reliability.

Question 2: What are the core differences and applicable scenarios between EP2338/39 configurable I/O and EP2308/18 fixed I/O?

answer:

Fixed I/O: Fixed input and output quantity, low cost, intuitive wiring, suitable for standard I/O requirements.

Configurable I/O: Each channel can be freely used as input or output, with high flexibility, suitable for modification, testing, and non-standard equipment.

Question 3: What explosion-proof certifications does EP23xx meet? What mandatory conditions must be followed for use in explosion-proof environments?

answer:

Certification: ATEX, IECEx, UKEX, Level II 3G Gc/II 3D Dc.

Mandatory conditions: BG2000 protective case must be installed, ambient temperature must be between 0~+55 ℃, power must be turned off before insertion and removal, SELV/PELV safety power supply must be required.