Short description
I/O module | 8 safe type A digital inputs, 4 pulse outputs, 24 VDC, 6 safe type B2 digital outputs, 24 VDC, 0.2 A, OSSD <10 µs, reACTION Technology |
General information
Safety characteristics
I/O power supply
Nominal voltage | 24 VDC |
Voltage range | 24 VDC -15% / +20% |
Integrated protection | Reverse polarity protection |
Safe digital inputs
Variant | Type A |
Nominal voltage | 24 VDC |
Input characteristics per EN 61131-2 | Type 1 |
Input filter | |
Hardware | ≤130 µs |
Software | Configurable between 0 and 500 ms |
Input circuit | Sink |
Input voltage | 24 VDC -15% / +20% |
Input current at 24 VDC | Max. 3.28 mA |
Input resistance | Min. 7.33 kΩ |
Error detection time | 100 ms |
Insulation voltage between channel and bus | 500 Veff |
Switching threshold | |
Low | <5 VDC |
High | >15 VDC |
Cable length between signal source (pulse output or external signal) and input |
Max. 60 m with unshielded line Max. 400 m with shielded line |
Safe digital HS-HS outputs
Current on loss of ground
IOUT | <100 µA |
IGND | <200 mA |
Pulse outputs
Operating conditions
Mounting orientation | |
Horizontal | Yes |
Vertical | Yes |
Installation elevation above sea level | 0 to 2000 m, no limitation |
Degree of protection per EN 60529 | IP20 |
Ambient conditions
Temperature | |
Operation | |
Horizontal mounting orientation | 0 to 60°C |
Vertical mounting orientation | 0 to 50°C |
Derating | See section "Derating". |
Storage | -40 to 85°C |
Transport | -40 to 85°C |
Relative humidity | |
Operation | 5 to 95%, non-condensing |
Storage | 5 to 95%, non-condensing |
Transport | 5 to 95%, non-condensing |
Mechanical properties
Note |
Order 2x safety-keyed terminal block separately. Order 1x safety-keyed bus module separately. |
Pitch | 25+0.2 mm |

Material number:
X20SRT806Description:
- reACTION Technology module
- 8 high-speed safe digital inputs, sink circuit
- 4 pulse outputs
- Software input filter configurable for each channel
- 6 high-speed safe digital outputs, output type B with 0.2 A, source circuit
- Safe reACTION task cycle times starting at 125 µs
- Integrated output protection
This reACTION Technology module is equipped with 8 high-speed safe digital inputs and 6 high-speed safe digital outputs. It is designed for a nominal voltage of 24 VDC.
The module can be used to read in digital signals and to control actuators in safety-related applications up to PL e or SIL 3.
Ultrafast reACTION Technology makes it possible to control internal I/O channels with cycle times down to 125 µs. All commands that can be used for reACTION programs are available as function blocks in special libraries (e.g. AsIORTI). Programming in compliance with IEC 61131-3 requirements takes place in the Function Block Diagram editor in Automation Studio.
The module is equipped with filters that are individually configurable for switch-on and switch-off behavior. The module also provides pulse signals for diagnosing the sensor line.
The outputs are designed using semiconductor technology so that the safety-related characteristics do not depend on the number of switching cycles. The "high-side high-side" variant (output type B) is required for actuators with reference potential (e.g. enable inputs on frequency inverters). It is important to observe the special notices for the cabling in this case. The safe digital output modules have a start interlock on error in the event of network errors.
This module is designed for X20 12-pin terminal blocks.
Mandatory Accessories
Automation Studio HW Upgrades | Version (Date) | Download |
---|---|---|
V4.2 HW Upgrade (X20SRT806) | EXE / 4 MB | |
V4.6 HW Upgrade (X20SRT806) | EXE / 2 MB |
Certificates | Version (Date) | Download |
---|---|---|
E115267 UL CoC X20 | PDF / 847 KB | |
FS Certificate SafeDESIGNER, SafeLOGIC, SafeIO | PDF / 370 KB | |
FS Certificate mapp Safety | PDF / 3 MB |
Documentation | Version (Date) | Download |
---|---|---|
Data sheet X20SRTxxx - Legacy | PDF / 4 MB | |
Data sheet X20SRTxxx - mapp Safety | PDF / 2 MB |
E-CAD (Electro or EPLAN Templates) | Version (Date) | Download |
---|---|---|
X20 EPLAN P8 from V2.4 | EXE / 123 MB |
Tools / Utilities / Examples | Version (Date) | Download |
---|---|---|
Sistema library | ZIP / 319 KB |