CTEK M4200E SkyRouter - Manual (Page 17)

Part Number 91-601-01
Release 1.00
14
4.2.3 Configuring The Relay Input Interface
This screen configures the connection characteristics of the relay input interface and defines the service associated with
this interface. Currently, the relay interface can cause an SMS message to be sent to another wireless device or an e-
mail message to be sent to any valid email address.
Appendix A contains schematic information concerning the relay input configuration.
Figure 8
Relay Input Trigger – Establishes the conditions under which the Relay Service will be invoked. Unless it is disabled the
relay input is sampled at 1000 millisecond (1 second) intervals.
Disabled – Never respond to relay activity
On Closure – Respond when relay contacts go closed
On Opening - Respond when relay contacts go open
Maximum Trigger Rate – This setting determines how often the SkyRouter will send a “relay event” message. If the relay
event is recurring at a rapid rate this setting will prevent an undesirable “flood” of messages. If Maximum Trigger Rate is
set to "Always" the relay input is operating in edge triggered mode. In this mode the SkyRouter will invoke its assigned
service any time that the input transitions to the selected state. So if ON CLOSURE is selected an SMS is sent every time
that the contacts close. This means that once closure is sensed there can be no other closure event until the contacts are
first sensed to be open.
All other modes where Max Trigger Rate has a time value are level sensitive. So it the contacts close an SMS is sent and
then the state of the relay input is ignored for a defined period of time. For instance, if Max Trigger Rate is set to 5
minutes an SMS is sent and then the relay input is sampled again in 5 minutes. If the contacts are still closed another
SMS is sent. If the relay input is not closed SkyRouter reverts to monitoring the relay every second.