Tunnel Master® wbc Installation Guide
Page 20
Tunnel Master® wbc Installation Guide
Page 20
NOTES:
1. The manual bypass relay will activate and deactivate as the conveyor relay does. Any piece of tunnel
equipment that is meant to be on and off with the conveyor, should be terminated to this relay.
2. The conveyor relay will activate upon the start circuit being momentarily closed or a wash having been
loaded into the controller, dependent upon how the controller is programmed. This relay will remain
fired until after the last car in the tunnel has passed the last piece of equipment in the tunnel, plus that
piece of equipment’s extend time, plus the value programmed for the auto stop delay.
3. The horn relay will activate if the conveyor is stationary and a wash has been loaded into the controller.
The horn will activate for the time programmed through the settings of DIP switches one and two on the
input board. The extend time represents the pause in seconds between the horn relay deactivating and
the conveyor relay activating. It is programmed through the settings of DIP switch three and four.
Conveyor Relay Wiring
Wiring for the conveyor control circuit is energized via a separately configured conveyor relay. Conveyor
wiring summary is as follows:
The conveyor relay on the input board is wired to a designated conveyor relay on a dedicated relay
board, and then it is wired to the conveyor equipment.
Input supply voltage, for example 120 V AC or 24 V AC, for all equipment is switched through
Relay 1 or Relay 2 on the input board.
Normally Open (NO) terminal block for Relay 1 or Relay 2 on the input board is wired to the
Common (C) terminal position of the Relay board for the designated Conveyor Relay.
Normally Open (NO) terminal block on the designated Conveyor Relay is wired to the conveyor
equipment.
Details include the following:
During a panic stop, the circuit is guaranteed to break power to the relays and thus not depend on a
computer to stop.
During a staggered restart, the computer initiates a wash start which energizes the relays. Only at
the end of the wash start is the conveyor relay turned on.
Wetdown process turns on the conveyor relay.
Conveyor Relay DIP Switch Settings
The conveyor horn and delay control is handled via the DIP switch settings on the input board.
The DIP switches on the input board follow the silk-screen reference on the board (0 and 1) to
determine the desired switch positions.
