Appendix, Additional digital i/o information, Appendix 125 – MTS Criterion 40 - Manual User Manual
Page 125: Additional digital i/o information 125
Additional Digital I/O Information
MTS Criterion
®
Series 40 Product Manual
Appendix
125
Appendix
Additional Digital I/O Information
The digital inputs have an MOCD223 optical isolator with 2.7 Kohm, ½ Watt
series resistor. To reliably turn on, they need 1 mA of current. This means the
minimum input high voltage is 4.0 V DC. The maximum input voltage is 28.0 V
DC. The device should be off for input voltages less than 1.0 V.
The digital outputs are implemented by an AQV252G PhotoMOS relay with a
0.75 Amp poly fuse in series. Although the device is rated at 60 V peak, it is
recommended that a maximum of 48 V be applied. If the load is highly inductive,
such as a relay coil, an appropriate snubber network should be used near the coil
terminals to prevent large flyback voltages from exceeding the device ratings.
A typical example might be connecting an external switch.
Criterion_product manual.book Page 125 Monday, July 28, 2014 3:52 PM
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