Close-off systems

The close-off system “abs 9304” is designed and approved especially for the use with conveyance system closures (Z-6.5-1517). It consists of the following components:

  • Power supply: 230 V/50 Hz
  • Working range: 198 – 253 V
  • Power consumption: 36 – 108 W
  • Ambient temperature: 0 – 40° C

Power supply

Electrical supply for fire alarm, tripping device, close-off device and auxiliary equipment.

Charging board

Charging board for the separate charging and maintaining power supply of the maintenance-free batteries (2 × 12 V, per 1.2-15.0 Ah each), which are used as a second energy source in the standby parallel operation.


An automatic switch -over to battery mode occurs in case of a power failure. The emergency power supply for the conveyor system must be provided separately.


The plug-in unit is equipped with optical alarm and failure displays as well as a manual tripping. After tripping the system will be reset through the integrated “Reset button”.

Tripping boards and expansion module AL 3

The tripping device processes the signals transmitted by the sensors (fire identification elements and light barriers) and trips the connected close-off device. The tripping board is located as a plug-in board in the close-off system BR 9304. When using additional conveyance system closures, then an expansion module AL 3 is required for each closure. It mainly consists of the tripping board.

Other components

  • Fire identification elements: A variety of fire identification elements where tested by interacting with the control system and they are approved for use (see approval decision)
  • Closing area monitoring: If required, the closing area of the conveyance system closure can be monitored using a special light barrier (VdS tested). This ensures that the closures only close if there is no transport product in the closing area
  • Tripping button
  • Additional “hand before location switch”
  • External alarming equipment
  • Limit switch “Gate closed”

Power supply close-off system

Designation Manual reopening Motor driven reopening
Voltage 230 V AC 230 V or 400 V AC
Frequency 50 Hz 50 Hz
Phase L1 L1/L2/L3
Neutral wire N N
Protective conductor PE PE
Protection 16 A 16 A bzw. 25 A
Protection class IP 40 IP 40

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