Short description
I/O module | 2 safe type A digital inputs, 2 pulse outputs, 24 VDC, 2 relays with 1 normally open contact each, 48 VAC / 6 A, 24 VDC / 6 A |
General information
B&R ID code | 0xDD5D |
System requirements | |
Automation Studio | 4.0.16 or later |
Automation Runtime | V3.08 or later |
SafeDESIGNER | 3.1.0 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 | 0.26 W |
Internal I/O | 1.15 W |
Electrical isolation | |
Channel - Bus | Yes |
Channel - Channel | Yes |
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 |
HazLoc |
cCSAus 244665 Process control equipment for hazardous locations Class I, Division 2, Groups ABCD, T5 |
DNV GL |
Temperature: A (0 - 45°C) Humidity: B (up to 100%) Vibration: A (0.7 g) EMC: B (bridge and open deck) |
KR | Yes |
EAC | Yes |
Relays | |
EN 50155 | Yes |
EN 50205 | 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. 4.59 mA |
Input resistance | Min. 5.23 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 |
Relay outputs
Variant | 2 relays, each with 1 normally open contact, internal high-side and low-side control |
Diagnostic status | Contact position determined by positively driven contacts |
Max. switching frequency | 10 Hz |
Switching delay | |
0 → 1 | <50 ms |
1 → 0 | <50 ms |
Insulation voltage between channel and bus | Safe disconnection of 300 VAC per EN 50178 |
Insulation voltage between channel and channel | 48 VAC |
Contact resistance (without terminal block) | 20 mΩ |
Contact service life | See "Contact service life". |
Short-circuit protection, overload protection | External 6 A gL/gG fuse (blow-out fuse), LS automat C characteristic 1.6 A |
Switching voltage range | 5 to 24 VDC, 5 to 48 VAC |
Switching current range | 5 mA to 6 A |
Coil voltage | 24 VDC -15% / +20% |
Short-circuit proof | Yes, 1000 A (with specified short-circuit / overload protection) |
Max. inrush current | 30 A for 20 ms |
Overvoltage category per EN 60664-1 | II |
Max. switching capacity | |
AC1 | 48 VAC / 6 A |
AC15 | 48 VAC / 3 A |
DC1 | 24 VDC / 6 A |
DC13 | 24 VDC / 5 A / 0.1 Hz |
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
Mechanical properties
Note |
Order 1x safety-keyed terminal block separately. Order 1x safety-keyed bus module separately. |
Pitch | 25+0.2 mm |

Material number:
X20cSC2432Description:
- 2 safe digital inputs, sink circuit
- 2 pulse outputs
- Software input filter configurable for each channel
- 2 safe relay outputs
- Output type "Relay"
- Relay module for 48 VAC / 24 VDC
- Switching current 6 A
- Normally open contact
- Single-channel isolated outputs

The module is equipped with 2 safe digital inputs and 2 safe relay outputs. It is designed for a nominal voltage of 24 VDC.
The module can be used to read digital signals and for floating control of 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.
Safety relays are installed in the module. The positively driven feedback contacts are evaluated internally by the module. 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 (X20cSC2432) | EXE / 2 MB | |
V4.6 HW Upgrade (X20cSC2432) | EXE / 1 MB |
Documentation | Version (Date) | Download |
---|---|---|
Data sheet X20(c)SC2432 - Legacy | PDF / 1 MB | |
Data sheet X20(c)SC2432 - mapp Safety | PDF / 818 KB |
E-CAD (Electro or EPLAN Templates) | Version (Date) | Download |
---|---|---|
X20 EPLAN P8 from V2.4 | EXE / 161 MB |
M-CAD (Mechan. Templates) | Version (Date) | Download |
---|---|---|
3D file STEP/DXF X20(c)Sxxxxx | ZIP / 1 MB |