MTS Insight - 1kN to 300kN - Manual (Page 73)

Additional Digital I/O Information
Insight Material Testing System Appendix 73
Appendix
Additional Digital I/O Information
The digital inputs have an MOCD223 optical isolator with 2.7 Kohm,
½ Watt series resistor. To reliable turn on they need 1 mA of current.
This means the minimum input high voltage is 4.0 Vdc. The
maximum input voltage is 28.0 Vdc. 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 but
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.
Insight Controller
User
Digital
Output
User
Digital
Input
From Logic
Controller
To Logic
Controller
Optical
Isolator
PhotoMOS
Relay