HIMA F3 DIO 20/8 02 is a safety related remote I/O module certified by T Ü V, belonging to the HIMatrix programmable electronic system family. This module adopts a compact metal shell design, providing 20 digital inputs and 8 digital outputs. It communicates with HIMax or HIMatrix controllers through the SafeEthernet protocol to expand the system's I/O hierarchy, but does not run user programs on its own.
This device is suitable for safety related applications up to SIL 3 level, complies with IEC 61508, IEC 61511, IEC 62061 standards, and also meets Cat. 4 and PL e (EN ISO 13849-1) requirements. For railway applications, this module has also obtained SIL 4 certification and complies with EN 50126, EN 50128, and EN 50129 standards. In addition, the device is suitable for installation in Zone 2 explosive environments.
Product Model and Selection
F3 DIO 20/8 02 offers multiple models to adapt to different environmental requirements and programming tools:
Model, working temperature, special characteristics, programming tool
F3 DIO 20/8 02 0...+60 ° C Standard ELOP II Factory
F3 DIO 20/8 021 (-20 ° C) -20...+60 ° C wide temperature type, with protective coating ELOP II Factory
F3 DIO 20/8 023-25...+70 ° C salt spray resistant (IEC 60068-2-11) ELOP II Factory
F3 DIO 20/8 024-25...+70 ° C railway application, anti vibration and anti impact ELOP II Factory
F3 DIO 20/8 02 SILworX 0...+60 ° C Standard SILworX
F3 DIO 20/8 021 SILworX -20...+60 ° C wide temperature type, with protective coating SILworX
F3 DIO 20/8 023 SILworX -25...+70 ° C salt spray resistant SILworX
F3 DIO 20/8 024 SILworX -25...+70 ° C Railway Application SILworX
Safety functions and fault response
3.1 Safety related digital inputs
The 20 digital inputs adopt a non electrically isolated design, and the status of each input is indicated by an independent LED.
Connection method:
Passive mechanical contacts: powered by a 24V power supply (LS+) with internal short-circuit protection, with every 4 contacts in a group
Active signal source: The corresponding ground terminal needs to be connected to the input terminal (L -)
Fault response:
When the device detects a digital input fault:
According to the principle of "power loss trip", the user program processes low-level signals
FAULT LED lights up
User programs need to consider both channel signal values and corresponding error codes simultaneously
Line monitoring function:
To achieve emergency stop input monitoring that complies with EN ISO 13849-1 Cat.4 and PL e, the line monitoring function can be configured to detect short circuits or open circuits. By connecting the digital outputs (DO 1-8) of the system to the digital inputs (DI) of the same system and configuring pulse outputs, it is possible to detect:
Cross short circuit between two parallel wires
Line connection error
Grounding fault (only applicable to grounding systems)
Open circuit or contact disconnection
3.2 Safety related digital outputs
The 8-channel digital output adopts a non electrically isolated design, and the status of each output is indicated by an independent LED.
Load capacity:
Channels 1-3 and 5-7: Maximum 0.5 A (up to 60 ° C)
Channels 4 and 8: Temperature related load capacity
< 50°C:2 A
50-60°C:1 A
60 ° C: 0.5 A (limited to F3 DIO 20/8 023 and 024 only)
Overload protection:
When overload occurs, one or all affected digital outputs are turned off. After the overload is eliminated, the output will automatically reconnect.
Fault response:
When the device detects a digital output fault:
The output of the affected module is set to a safe (power-off) state through a safety switch
When a device malfunction occurs, all digital outputs are turned off
FAULT LED lights up
Important precautions:
The redundant connection of two outputs must be decoupled using diodes
Single pole switching output must use the corresponding channel group's L-ground terminal (two pole connection)
For inductive loads, it is recommended to directly connect the freewheeling diode

Technical specifications
4.1 General specifications
Parameter specifications
Response time ≥ 10 ms
Ethernet interface 2 x RJ-45, 10BASE-T/100BASE-Tx, integrated switch
Working voltage 24 VDC, -15%/+20%
Maximum input current 8 A (at maximum load)
No load current of approximately 0.4 A (at 24 V)
External fuse 10A, delay type (T)
Protection level IP20
Dimensions (W x H x D) 207 mm x 114 mm x 66 mm
Weight approximately 1 kg (standard type)/1.2 kg (wide temperature type)
4.2 Digital Input Specifications
Parameter specifications
Input quantity 20 (non electrically isolated)
High level 15-30 VDC, ≥ 2 mA (at 15 V)
Low level ≤ 5 VDC, ≤ 1.5 mA
Typical switch point 7.5 V
Sensor power supply 5 x 20 V/100 mA (at 24 V), short circuit protection
4.3 Digital output specifications
Parameter specifications
Output quantity 8 (non electrically isolated)
Output voltage ≥ L+minus 2 V
Minimum load of 2 mA per channel
Maximum internal pressure drop of 2 V (at 2 A)
Maximum leakage current of 1 mA (at 2 V)
The maximum total output current is 7 A
Communication and Diagnosis
5.1 SafeEthernet Communication
The module communicates with the associated controller through the SafeEthernet protocol, providing:
RJ-45 Ethernet ports for two integrated switches
Supports 10BASE-T/100BASE-Tx, half duplex and full duplex
Automatic negotiation and automatic crossover functions
Free configuration of IP address and subnet mask
Network port used:
UDP 8000: Programming and Debugging
UDP 8001/8004: PES configuration
UDP 6010:safeethernet
UDP 123: SNTP time synchronization
5.2 LED Status Indication
LED color status description
24 VDC green on/off working voltage present/absent
RUN green on/flashing/off RUN/STOP/non running
ERROR red light on/flashing/extinguishing error stop/start loading/no fault
FAULT yellow light on/flashing/extinguishing configuration invalid/loading fault/no fault
DI 1-20 yellow light on/off input activated/inactive
DO 1-8 yellow light on/off output activated/inactive
5.3 Reset button function
Some models are equipped with a reset button, which can be accessed through a pin made of insulating material. Pressing and holding the reset button for at least 20 seconds during restart can:
Restore the connection parameters (IP address and system ID) to their default values
All accounts are disabled except for the administrator's default account (empty password)
Installation and wiring
6.1 Mechanical Installation
Installed on a 35 mm DIN rail
Appropriate measures should be taken to avoid interference during wiring, such as separating signal lines from power lines
6.2 Zone 2 Installation Requirements (ATEX)
Special conditions must be met when installing in Zone 2:
Installed in a casing that meets the requirements of EN 60079-15, with a minimum protection level of IP54
The casing needs to be labeled as' only allowed to operate in power-off state '
The casing must be able to safely dissipate heat (power consumption 9-25 W)
Use 10A delay type fuse protection
Only PELV or SELV power supplies can be used
6.3 Terminal Wiring
Digital input terminal:
13-18: Input 1-4, LS+sensor power supply, L-ground
19-24: Input 5-8, LS+sensor power supply, L-ground
25-30: Input 9-12, LS+sensor power supply, L-ground
31-36: Input 13-16, LS+sensor power supply, L-ground
37-42: Input 17-20, LS+sensor power supply, L-ground
Digital output terminal:
1-6: Output 1-4 (DO+), L-Ground (Channel Group 1)
7-12: Output 5-8 (DO+), L-Ground (Channel Group 2)
6.4 Cable plug specifications
Power connection:
4-pole screw terminal
Wire cross-sectional area: 0.2-2.5 mm ²
Stripping length: 10mm
Tightening torque: 0.4-0.5 Nm
On site side connection:
7 6-pole screw terminals
Wire cross-sectional area: 0.2-1.5 mm ²
Stripping length: 6mm
Tightening torque: 0.2-0.25 Nm
Configuration and Parameters
F3 DIO 20/8 02 can be configured using SILworX (CPU OS V7 and above) or ELOP II Factory (CPU OS V6. x and below).
7.1 SILworX Configuration Parameters
Digital input module parameters:
DI Number of Pulsed Channels: The number of pulse output channels (used for line monitoring)
DI Pulse Slot: Pulse Module Slot
DI Pulse Delay [μ s]: Line monitoring waiting time
DI. Error Code: The error code for all numerical inputs
Module Error Code: Module Error Code
Digital input channel parameters:
->Error Code [BYTE]: Channel Error Code
->Value [BOOL]: Input value
Pulsed Output [USINT]: Pulse Source Channel
Digital output module parameters:
DO. Error Code: The error code for all numerical outputs
Module Error Code: Module Error Code
Digital output channel parameters:
->Error Code [BYTE]: Channel Error Code
Value [BOOL]: Output value
7.2 Error Code Interpretation
Number input error code:
0x01: Digital input module malfunction
0x10: Channel short circuit
0x80: Open circuit between pulse output DO and digital input DI (such as open circuit, contact disconnection, L+undervoltage)
Digital output error code:
0x01: Digital output module malfunction
0x02: Channel shut down due to overload
0x04: Digital output read back error
0x40: External short circuit or EMC protection short circuit
0x80: Channel shut down due to corresponding channel failure
Module error code:
0x0000: I/O processing is normal
0x0001: No I/O processing (CPU not running)
0x0010: Invalid configuration
0x0020: Failure rate exceeds the limit
0x0040/0x0080: The configured module is not inserted
Maintenance and operation
8.1 Normal operation
Remote I/O must operate in conjunction with the controller without the need for specific monitoring
The first diagnosis can be made through LED evaluation
8.2 Maintenance Measures
Operating system loading: Utilize system downtime to load the latest version
Regular testing: Conduct validation testing every 10 years (refer to safety manual HI 800 023 E)
8.3 Fault Handling
Digital input/output fault response, see Chapter 3
If a safety critical fault is detected in the testing hardware, the module enters the STOP_INVALID state, the input signal is no longer processed, and the output switches to a safe power-off state
8.4 Discontinuation and Disposal
Deactivation: Disconnect the power, unplug the pluggable terminal block and Ethernet cable
Transportation: Original packaging must be used
Disposal: Industrial customers are responsible for the proper disposal of retired hardware and may sign disposal agreements with HIMA as needed
