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1:
The ComTroll 333 provides 4 analog inputs. The four unipolar analog inputs offer
10 bit resolution, and may be individually programmed according to the incoming
signal. It can be set to 0 – 10V (see note below for analog input 4) or 4 – 20mA. The
inputs are read when the user executes a status request or when the ComTroll 333
sends any other message, e.g heartbeat.
Important notice
When the analog input 4 is set to read voltage, the range will be 0 -14,6V. This means
the battery voltage can be directly connected to this input to monitor the battery
voltage from the central unit. When the analog input 4 is set to current reading, the
range is 4-20mA. This means if analog input shall be used for other measurements
than battery voltage, 4-20mA setting must be used.
2:
The Low Battery Input is a digital input that activates a warning message when the
input is shorted to GND. Please note that an external voltage relay must be used as
this is a digital input. This can also be used to monitor charging failure by connecting
a voltage relay with a signal contact to this input. The Low Battery warning is always
sent as an SMS to the central unit. To avoid warnings upon short voltage drops, the
SMS is delayed 60 sec.
If the normal battery voltage is restored within 60 seconds (or external charging is
restored) no message will be sent.
60s
SMS to receiver number
GND
LowBatt
Figure 4; Low Battery Input
3:
All of the 8 bipolar digital inputs are opto isolated and have the same physical layout.
However, the CLOSED and OPEN inputs have been assigned special functions in the
software, to make the unit suitable as a MV switchgear Terminal.
The user can define in the CONFIG command whether changes on the inputs are sent
as SMS or GSM Data, as well as sending updates on one or both transitions.
