Short description
I/O module | 8 safe type A digital inputs, 4 pulse outputs, 24 VDC, 4 safe type A digital outputs, 24 VDC, 3 A, OSSD <500 µs, 2 safe type B2 digital outputs, 24 VDC, 50 mA, OSSD <500 µs |
General information
B&R ID code | 0xE7F9 |
System requirements | |
Automation Studio | 4.0 or later |
Automation Runtime | 4.0 or later |
SafeDESIGNER | 3.4.0 or later |
Safety Release | 1.7 or later |
Status indicators | I/O function per channel, operating state, module status |
Diagnostics | |
Module run/error | Yes, using status LED and software |
Outputs | Yes, using status LED and software |
Inputs | Yes, using status LED and software |
Blackout mode | |
Scope | Module |
Function | Module function |
Standalone mode | No |
Max. I/O cycle time | 1 ms |
Power consumption | |
Bus | 0.4 W |
Internal I/O | 2.5 W |
Electrical isolation | |
Channel - Bus | Yes |
Channel - Channel | No |
Certifications | |
CE | Yes |
Functional safety |
cULus FSPC E361559 Energy and industrial systems Certified for functional safety ANSI UL 1998:2013 |
Functional safety |
IEC 61508:2010, SIL 3 EN 62061:2013, SIL 3 EN ISO 13849-1:2015, Cat. 4 / PL e IEC 61511:2004, SIL 3 |
Functional safety | EN 50156-1:2004 |
ATEX |
Zone 2, II 3G Ex nA nC IIA T5 Gc IP20, Ta (see X20 user's manual) FTZÚ 09 ATEX 0083X |
UL |
cULus E115267 Industrial control equipment |
DNV GL | In preparation |
EAC | Yes |
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 | ≤150 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-LS outputs
Safe digital HS-HS outputs
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:
X20SC0842Description:
- 8 safe digital inputs, sink circuit
- 4 pulse outputs
- Software input filter configurable for each channel
- 4 safe digital outputs, output type A with 3 A, source circuit
- 2 safe digital outputs, output type B with 50 mA, source circuit
- Integrated output protection
The module is equipped with 8 safe digital inputs and 6 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.
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 operating cycles. The "high-side low-side" variant (output type A) is limited to actuators without reference potential (e.g. relays, valves). Type A outputs have safety-related advantages since the actuator can be cut off in its connection cable in all error scenarios. 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. Safe digital output channels provide protection against automatic restart when network errors occur.
This module is designed for X20 12-pin terminal blocks.
Mandatory Accessories
Automation Studio HW Upgrades | Version (Date) | Download |
---|---|---|
V4.0 HW Upgrade (X20SC0842) | EXE / 3 MB | |
V4.6 HW Upgrade (X20SC0842) | EXE / 2 MB |
Certificates | Version (Date) | Download |
---|---|---|
E115267 UL CoC X20 | PDF / 847 KB | |
FS Certificate SafeDESIGNER, SafeLOGIC, SafeIO | PDF / 328 KB | |
FS Certificate mapp Safety | PDF / 3 MB |
Documentation | Version (Date) | Download |
---|---|---|
Data sheet X20SC0xxx - Legacy | PDF / 2 MB | |
Data sheet X20SC0xxx - mapp Safety | PDF / 2 MB |
E-CAD (Electro or EPLAN Templates) | Version (Date) | Download |
---|---|---|
X20 EPLAN P8 from V2.4 | EXE / 161 MB |
Tools / Utilities / Examples | Version (Date) | Download |
---|---|---|
Sistema library | ZIP / 319 KB |