Additional Features
Contact Sense
5-6
SpectraComm SDT
076R174-000
Installation and Operation Manual
Issue 4
Contact Sense
The SC-SDT can be configured for contact sensing and employs the rear panel DB25 interface to
make connections to up to eight external relays. When an external relay is connected between
output and input pins of any contact port, the SC-SDT can sense the state of the relay contacts. All
eight ports can be polled very quickly, providing Contact Sense for all ports simultaneously.
Each contact port must be configured as Normally Opened or Normally Closed. A closed condition
on a normally opened port will cause an ACTIVE condition. Likewise, an open condition on a
normally closed port will cause an ACTIVE condition. When the contact port returns to its normal
state a CLEAR condition is in effect. Any transition between open and closed will generate an
SNMP trap which is recorded in the SYS MSG log and the Alarm log.
•
For help in setting Contact Sense parameters, type:
configure contact ?
•
To show the status of Contact Sense, type:
show contact
Figure 5-2
Help and Status Displays for Contact Sense
Summary of Contents for SpectraComm SDT
Page 73: ......
