Hardy HI 4050, User Manual

Page: 44 / 192

Installation 34
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Analog Output Wiring
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Channel 1 -Voltage
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Channel 2 - Current
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Channel 3 - Voltage
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Channel 4 - Current
NOTE Use a torque connector screw driver to properly tighten the screw terminals to 7inch/lbs (8
kg/cm)
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Wiring the Digital I/O Option Card (-DIO)
The digital I/O card plugs into either the Options or
Network slot. (Do no use the External output slot.)
The card can process up to three discrete input signals
from a connected PLC or other source without using a
relay. Its four outputs enable you to connect to external
relays for switching on a valve, switch, etc.
Pin Setup and Wiring
Suggested Option Card Input Wiring
To activate the DIO card's inputs, apply 3-30 VDC
between the input terminal (pin 7, 8 or 9) and the COM
terminal, pin 6 on the DIO card's 9-pin connector.
6 - Common (Isolated)
7 - Input 1
8 - Input 2
9 - Input 3
Suggested Option Card Output Wiring
You can use the four DIO card outputs to send a TTL weak
5vdc output signal (worst case minimum 3 V at 5mA out)
to a relay driver circuit to actuate mechanical relays. The
outputs can also implement pull-to-ground applications
requiring 250mA or less. When the output activates, it
pulls the return side to ground and activates the relay coil.
For connections to the digital outputs, 1-4 are output 1to
output 4, and 5 is the GND (Same as power GND).
Steps to hook up an external relay
Step 1. Attach a 3-30 VDC power supply common to the GND terminal, pin 5.