Hardy hi 215it junction box – Hardy HI 1756-nDF User Manual
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Chapter 3
The simple wiring diagram above shows how to connect a single load cell to a single
channel 1756 1DF module. Note, when connecting the 1756 1DF to a junction box, the
sense lines would be connected to +Sen and –Sen Connections in the diagram.
The solid state relays used in the 1756 nDF require a 2mA minimum load. When
switching a light load with a solid state relay across the line, you must look at the rated
dropout current of the load. If it is less than 2mA it may not turn off. The solution is to
put a loading resistor in parallel with the light load, to be sure leakage current is sufficient
to the solid state relay is turned off.
CAUTION:
INSTRUMENT POWER AND RELAY WIRES SHOULD BE ROUTED AWAY FROM ALL
OTHER SIGNAL CABLES TO AVOID ELECTRICAL INTERFERENCE.
Hardy HI 215IT Junction Box
Hardy HI 215IT Junction Box Wiring Diagram
NOTE
When connecting the Hardy HI 215IT Junction Box, you must remove the two factory
installed jumpers on pins 1&2 and on pins 5&6 on the module and install C2 and sense
wires. C2 wires carry the commands for Integrated Technician and the C2 calibration
information.
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1
1756 1DF