Cellwatch Frontier - Hardware Relay

Cellwatch Frontier System Installation & User Manual
Section II – User Guide-78
It is highly recommended that discharge current be monitored, however a CT is not required for the
Frontier system to operate.
Type
The user can configure a CT to monitor for discharges or charges, depending on the design and capacity
of the CT. A discharge only CT is typically combined with a charge only CT on a single string to represent
one logical CT, but this option can be configured in Battery Design. A logical CT is a combination of two
or more CTs, but it is displayed as a single reading in the Frontier system.
Note: A current transducer that is configured as a discharge CT can also be used to measure a
recharge current, typically up to 20% of the current transducer’s capacity.
Capacity
Enter the maximum capacity (rating) of the current transducer. For example, a CT with an input of 50A is
capable of measuring a discharge current of up to 50A. In Frontier, this CT would be configured as a
discharge only CT with a capacity of -50.
Reading
The value displays real-time readings from any current transducers connected to the Frontier unit.
These readings can be used to verify the configuration is correct and to assess whether a CT should be
zeroed.
Users can zero a CT to remove offsets in the reading. This should be done with the CT removed from the
battery and closed, or with the string in an open state ensuring that there is no current flow.
Note: The capacity of the CT must be set before a user can zero the CT.
Hardware Relay
The hardware relay is a dry, volt-free contact that can be used to integrate alarm events into another
system for alarm reporting or alerts. Users can assign which alarm events will trigger the system relay
output on the Frontier device. Multiple alarm events can be chosen. If any of the chosen alarm events
occur, the relay is triggered. Each relay is rated to 30V at 5Adc.