
Installation
operation and installation manual
zappi
41
eSense Input
zappi
has an “external Sense” or “eSense” input which can be used with an external input (such as a relay contact
or voltage) to
sense the availability of economy tariff electricity, this can be used to automatically boost the charge when
in ECO or ECO+ charging modes.
force
zappi
to limit the output or stop the EV charging
IMPORTANT
The connection to the eSense input will depend on the version of the
zappi
.
Serial numbers starting 1xxxxxxx
The eSense input to the
zappi
is designed to work with an AC voltage between 100V and 260V.
Serial numbers from 2xxxxxxx onwards
A “universal” Sense input is provided. This will work with an external voltage 24-230V AC/DC wired to the terminals
marked “24-230V AC/DC in”
To use the eSense input with a simple “dry” relay contact, a 24V DC supply is provided. The external volt-free relay
contact should be wired between the terminals marked “24V out” and “in”
The eSense input is electrically isolated and effectively draws no current so the eSense signal may be connected
using a wire with a small cross section.
When the eSense input is active the cause the eSense symbol
will be shown on the main screen.
There is no need to connect the eSense input if you do not want to use this feature.
See eSense on page 33
31
for details of how to configure the eSense input
The following diagrams refer to
zappi
’s with serial numbers 2xxxxxxx onwards
.
If the eSense input is provided using an external volt-
free contact then this must be connected to the outer
terminals marked “24V out” and “in”
If the eSense signal is provided by using an external
voltage this must be connected to the two right hand
terminals marked “24-230V AC/DC in”
There is no need to earth the eSense cable