Serviceline Industrial Sensors
Serviceline Explosion Protection

AS-Interface Safety Monitor VAS-2A8L-KE4-8SE

  • Compact safety controller up to SIL 3/PLe
  • 4 integrated, safe inputs
  • 2 integrated, safe outputs (OSSDs)
  • 8 logical, safe output groups (switchable)
  • Increased functionality through integrated expansion port
  • Parameterizable muting, timer and logic functions using SIMON+ software

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  VAS-2A8L-KE4-8SE

Product Description
Safety Monitor, 8 decentralized output circuits
General specifications
AS-Interface specificationV3.0
UL File NumberE223772
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Performance level (PL)PL e
Mission Time (TM)20 a
PFHd5.08 E-9
Indicators/operating means
LED SMStatus of safety monitor, multicolored LED
green: Safety monitor OK
LED S1 ... S8Status of inputs S1 ... S8, yellow LED
yellow: Contact open
LED O1, O2Status of outlputs, multicolored LED
yellow: Output on
Electrical specifications
Auxiliary voltage (input)20 ... 30 VDC PELV
Insulation voltage500 V AS-Interface/UAUX:
Rated operating voltage18,0 ... 31.6 V from AS-Interface
Rated operating current≤ 200 mA from AS-Interface;
≤ 4 A from AUX
Interface 1
Interface typeChip card slot
Interface 2
Interface typeMicro USB
Programming interface
Number/Type8 / 4 safe inputs cat. 4
8 standard inputs
Supply24 V UAUX
Current loading capacity10 mA per signal output
1.4 A OSSD supply output
Input currentStatic switching current 4 mA at 24 V, dynamic 30 mA at 24 V (T=100 μs)
Number/TypeOutput circuits 1 and 2
max. contact rating:
700 m ADC-13 at 24  V
Supply24 V UAUX
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 62026-2:2013 EN 61000-6-2:2005/AC:2005
EN 61000-6-4:2007/A1:2011
Machinery Directive
Directive 2006/42/ECEN 13849-1:2008/AC:2009 EN 62061:2005
Standard conformity
Electromagnetic compatibilityEN 50295:1999 EN 61000-6-2:2005/AC:2005
EN 61000-6-4:2007/A1:2011
Degree of protectionEN 60529:2000
Electrical safetyIEC 61508:2010 and EN 62061:2005 (up to SIL3) EN 13849-1:2008/AC:2009 EN 61326-3-1:2008
AS-InterfaceEN 62026-2:2013
Programming instructions
IO code0
ID codeB
ID1 codeF
Ambient conditions
Ambient temperature0 ... 55 °C (32 ... 131 °F)
Storage temperature-25 ... 85 °C (-13 ... 185 °F)
Mechanical specifications
Degree of protectionIP20
Connectionremovable terminals
rated connection capacity:
rigid/flexible (with and without wire-end ferrules): 0.25 mm2 ... 2.5 mm2
for multiple-wire connection with two wires of equal cross-section:
flexible with twin wire-end ferrules: 0.5 mm2 ... 1.5 mm2
HousingPA 66-FR
MountingDIN mounting rail


CADFile TypeFile Size
3-D model in IGS format / 3-D-Modell im IGS-FormatIGS13206 KB
3-D model in STP format / 3-D-Modell im STP-FormatSTP2752 KB
CAD Portal / CAD PortalLINK---

Approvals+Certificates: VAS-2A8L-KE4-8SE

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2491DPDF268 KB
TUV Nord Functional Safety44 205 13078305PDF58 KB
US CA ULE223772LINK---

Software: VAS-2A8L-KE4-8SE

Software ToolsRelease InfoFile TypeFile Size
SISTEMA Library AS-Interface Safety / SISTEMA-Bibliothek AS-Interface SafetyZIP622 KB

Associated Products: VAS-2A8L-KE4-8SE

Software for configuration of K30 Master Monitors/K31 and KE4 Safety Monitorsfa
USB Type A to Micro-USB connectorfa

Function: VAS-2A8L-KE4-8SE

The AS-Interface safety monitor compact VAS-2A8L-KE4-8SE- is a control cabinet module with up to 8/4 local safe inputs and up to 8 independent outputs.

The safe inputs can optionally be configured as standard inputs and signalling outputs. Two of the safe inputs are also suitable as inputs for OSSDs, the others only for potentialfree contacts. Each safe input can also be configured as two standard inputs. 8 independent AS-Interface release circuits support multiple safe AS-Interface outputs on a single address. In addition, the test pulse outputs can be switched as diagnostic outputs (not control- safe). The safe circuit for the connected consumers is created using two safety relays.

The housing, which is only 22.5 mm wide, requires little space in the switch cabinet. The module is mounted by clicking it onto the 35 mm mouting rail, compliant with EN 50022.

The AS-Interface and external power supply are each connected by means of a 2-station terminal block. Connection of the inputs and outputs is by means of multiple 4-station terminal blocks. This permits the simple removal of the supply during commissioning or servicing. The supply to the connected slaves is fed either internally via the module from the AS-interface or via an external supply. The current status of the inputs and outputs is indicated via yellow LEDs. Communication faults are indicated via red LEDs. The display of the operating voltage and the address 0 is provided by a green LED.

A Micro-USB interface is used for configuration with the AS-i-Control Tools via ASIMON. The configuration can be transferred to a replacement device using a chip card.