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2 . Hardware applications
Model Number OUTPUT Input
PCI-P8R8 / PCI-P16R16 Relay Output Optical isolation
PCI-P16C16 Transistor Output
(Open collector)
Optical isolation
PCI-P16POR16 PhotoMos Relay Output Optical isolation
2.1 Relay Output
• For PCI-P8R8 / PCI-P16R16 Only
Whenever data is written data to the output control register, the relays will
switch to NC or NO as specified by the control code. A｀1＇in the control
register will energize the corresponding relay. The relay will switch from COM to
NO (normally open ). A ｀0＇ in the control register will turn off the
corresponding relay and the relay will be switch from COM to NC (normally
closed). The control register powers-on in NC mode. A hardware reset signal or
programmable reset signal will also turn the relay to NC!!
The following figures show how to use the relay.
Basic Circuitry: (Current Rating < 0.3 A):
Figure 2-1. Basic Relay Circuit.
Load
AC/ DC
Power Supply
COM
NO
Relay Contact
PCI-P8R8/P16R16/P16C16/P16POR16 User’s Manual (Ver.2.2, 2005/5/5) …
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