Nordson iDry
r
Series Induction Dryers
14
Part 1075452
−
04
E
2016 Nordson Corporation
External Interlock
The external interlock is an optional connection that indicates to the dryer
that the production line is running. When the interlock is used, the dryer
controller will not apply power to the induction coil if there is no interlock
signal.
CAUTION:
Nordson engineering recommends that the external interlock be
connected and enabled. Without the interlock, random line motion can
cause the controller to apply power to the coil while the line is stopped,
which could overheat and damage stationary can ends inside the coil.
Connecting the External Interlock
The external interlock requires an external 24 Vdc source at 100 mA to
power an internal relay coil (refer to Note below). The external 24 VDC
power source is not referenced to the dryer ground. The interlock indicates
to the dryer system that the production line is running. Without this signal,
the controller will not apply power to the induction coil.
NOTE:
The interlock relay coil is relay CR4 (IDEC part number RY22S).
Additional relay voltages are available through an IDEC distributor.
The interlock terminals are located behind the control enclosure doors, in
the front of the enclosure.
1. See Figure 10. Drill a hole or use a knockout tool to bring your interlock
cable into the enclosure. Install a properly sized strain relief or conduit
connector in the knockout.
2. Connect your interlock wiring to the terminal TB31.
1
2
Figure 10 External Interlock and Status Contact Connections
1. External Interlock terminal TB31
2. Status Contact terminal TB32