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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-P8POR8
PCI-P16POR16
PEX-P8POR8i
PEX-P16POR16i
PhotoMos Relay Output
Optical isolation
2.1 Relay
Output
•
For PCI-P8R8/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. 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):
Load
AC/ DC
Power Supply
COM NO
Relay Contact
Figure 2-1: Basic Relay Circuit
PCI-P16R16 Series User Manual (Ver.2.8, Apr. 2011, PMH-013-28)
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