Guard door monitors
  Series AES 2335 and 2336 to monitor one guard door


  • Control Category 3 to EN 954-1
  • Classification PDF-M to EN 60947-5-3 in combination with BNS safety sensors
  • 3 enabling paths
  • Monitoring of BNS range magnetic safety sensors
  • NO/NC contact combination can be connected
  • Cross-wire monitoring
  • ISD Integral System Diagnostics
  • Available for various operating voltages
  • Short-circuits proof additional transistor output
  • Feedback circuit to monitor external relays
  • Start function
  • Connection of input expander possible
  • Additional contacts by means of output expander
    55 x 75 x 110 mm
    The following faults are recognised by the safety monitoring module and indicated by means of ISD
    Failure of door contacts to open or close
    Cross-wire or short-circuit monitoring of the switch connections
    Interruption of the switch connections
    Failure of the safety relay to pull-in or drop-out
    Faults on the input circuits or on the relay control of the safety monitoring module
    Failure of or functional fault on the safety relay
    The ISD tables (Intergral System Diagnostics) for analysis of the fault indications and their causes are shown in the appendix.
    D, USA, CAN
Function table:
    Additional transistor output: Function / Switching condition:
    Y1 Authorized operation, enabling paths closed
    Y2 No authorized operation, enabling paths open
  • AES to monitor a guard door to Control Category 3 to EN 954-1
  • Monitoring one guard doors using a BNS range magnetic safety sensor.
  • The feedback circuit monitors the position of the contactors K3 and K4.
  • Start push button §H§
    A start push button (NO) can optionally be connected in the feedback circuit. With the guard door closed, the enabling paths are then not closed until the start push button has been operated.
  • If neither start push button nor feedback circuit is used, X1 and A1 must be bridged.
  • If only one external relay or contactor is used to switch the load, the system can be classified in Control Category 3 to EN 954-1, if exclusion of the fault “Failure of the external contactor” can be substantiated and is documented, e.g. by using a reliable down-rated contactor. A second contactor leads to an increase in the level of security by redundant switching to switch the load off.
  • The wiring diagram is shown with guard doors closed and in de-energised condition.
  Technical data
Standards: IEC/EN 60204-1; EN 60947-5-3; EN 954-1; BG-GS-ET-14; BG-GS-ET-20
Stop category 0
Control category: 3
Start conditions: automatic or start button
Start-up test: no / yes
Enclosure: glass-fibre reinforced thermoplastic
Mounting: snaps onto standard DIN rail to EN 50022
Termination: screw terminals
Cable section: max. 4 mm² (incl. conductor ferrules)
Protection class: terminals IP 20; enclosure IP 40 to EN 60529
Operating voltage Ue: AES 2335/2336: 24 VDC ± 15 %; AES 2335.1/2336.1: 110 VAC; AES 2335.2/2336.2: 230 VAC; AES 2335.3: 24 VAC
Operating current Ie: 0.2 A (DC version)
Power consumption: 5.8 W
Feedback circuit: yes
Monitored inputs 1 NC / 1 NO
Input resistance: approx. 2 k to ground
Input signal "1": 10 ... 30 VDC
Input signal "0": 0 ... 2 VDC
Max. cable length: 1000 m of 0.75 mm² conductor
Enabling contacts: 3 enabling paths
Utilisation category: AC-15, DC-13
Rated operating current/voltage Ie/Ue: 2 A / 250 VAC; 2 A / 24 VDC
Contact load capacity: max. 250 VAC, max. 3 A (cos = 1)
Max. fuse rating: 3 A gG D-fuse
Signalling output: 2 transistor outputs, Y1 + Y2 = max. 100 mA, p-type, short-circuit proof
Function display: LED (ISD)
EMC rating: conforming to EMC Directive
Max. switching frequency: 5 Hz
Overvoltage category: II to DIN VDE 0110
Degree of pollution: 3 to DIN VDE 0110
Resistance to vibration: 10 ... 55 Hz / amplitude 0.35 mm; ± 15 %
Resistance to shock: 30 g / 11 ms
Ambient temperature: 0 °C … + 55 ºC
Storage and transport temperature: – 25 °C … + 70 ºC
Dimensions: 55 x 75 x 110 mm
Note: Inductive loads (e.g. contactors, relays, etc.) are to be suppressed by means of a suitable circuit.

K.A. Schmersal GmbH / KASBASE Version 4.8 Rev.2 - 03.08.2005 / 2006-04-23 0659 UTC