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Description

Function :

Pull Cord and belt Sway switches are installed along the length of conveyor to provide safety. Checking of the actuated switch for rectifying and putting the system back into operation takes long time, resulting in production loss. By installing Trip Indication System it becomes easier to identify the actuated Pull Cord & Belt Sway switch location & helps in quick corrective action, thereby reducing the equipment down time.

Indication Unit consists of:

  1. Display Units & Master Module.
  2. Power Supply for Field Module.
  3. Field Sensor Module.


Principle of Operation:
Field Sensor Module is connected to the Master Module by means of 2.5 sq.mm. 2 core cable, regardless of number of switches.

Display unit is located in the control room and Field Sensors or Modules per Pull Cord / Belt Sway switch is fitted in the switch housing. When any switch actuates corresponding indicator will display operated switch number.

If more than one switch is actuated simultaneously then corresponding switch numbers are displayed cyclically on the display unit.


  The display unit will show healthy status, when no switch is actuated.
  When any switch is actuated corresponding switch no. shall be indicated. Also output relay shall change its status.
  Once the fault is cleared & system is reset, the display unit will show healthy status.
  In case of multiple switch actuation, displays all positions cyclically.
  Common Relay Output against actuated switch.
  No restriction on the distance between the conveyor and control room.
  Field Sensor Modules are weather proof.
  Use only one pair of field cable.
  Indicates open cable and damage cable position. In case of field cable broken / open the display unit will show the switch number and conveyor number, where the cable is broken or open. In case of short circuit in the field cable, display will show as short circuit.
  Indicates open cable and damage cable position. In case of field cable broken / open the display unit will show the switch number and conveyor number, where the cable is broken or open. In case of short circuit in the field cable, display will show as short circuit.
  Serial port RS 485 / RS 232 MODBUS protocol for PC interface / SCADA.


Master cum Display Unit:

Supply : 110 or 230 Vac (Please specify any one)
Input Signal : From Field Sensor Module
Trip Contact : 1 C/O potential free contact
Display : One inch 3 digit LED display
Output (Optional) : 4-20mA / RS232 / RS485 / MODBUS protocol
Enclosure : Sheet Steel, Weather Proof, Powder coated in light grey shade

Field Sensor Module:

Supply : 24VDC
Enclosure : Plastic with Epoxy potting
Size : 50 X 30 X 15mm

Trip Indication System is used for rectifying the actuated Pull Cord & Belt Sway Switch for taking the corrective action quickly.