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Tunnel Master® Jr. User Manual
Chapter 2: Hardware Installation
Pulse/Proximity Switch Wiring
IMPORTANT: The pulse switch is a critical input for the Controller. It signals the system that
the conveyor is moving and is the measuring device from which the system knows when to
turn equipment devices on and off.
See wash equipment vendor for location of the switch.
The Controller is designed to accept all commonly used pulse/proximity switches. There are two types
that are most commonly used, either a two wire or three wire Sinking (NPN) switch. The drawing below
indicates the wiring for these two types of switches.
The other type of switch is defined as a Sourcing (PNP). If it is determined that this type of proximity
switch is being used, there are two jumpers located just below the
CLK SINK
and
CLK SRCE
terminal
blocks (JP1) and (JP2). These jumpers must be moved to the
SOURCE
jumper position. Some pulse
switches vary in the wire color. You should check the pulse/proximity switch manual for proper color
codes. The following diagram shows how to wire the pulse/proximity switch into the Relay Box.
Figure 2-6. Pulse/Proximity Switch Wiring
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