A member of the Olancha Group Ltd
Registered in England No. 08405712
VAT Registration No. GB163 04 0349
Siretta Ltd
Basingstoke Road
Spencers Wood
Reading
Berkshire RG7 1PW
sales
fax
email
web
+44(0)118 976 9014
+44(0)118 976 9020
www.siretta.co.uk
37
ZETA Series
GPRS/UMTS/LTE Terminal with GPIO
Power Supply Requirements
A DC power supply must be connected to the power input.
Table 13.
Characteristics of power input
The ZETA modem has a wide operating voltage and can be powered from 5V to 42V.
Powering the modem can be done in 2 different ways:
»
Modem Power Supply - Standard multi region power supply provides constant
12V at 2A
»
Power Cable - Provide a power source between 5V to 42V from the supply of the
equipment connected
ZETA Series
DC input voltage
5 to 42V
Recommended input voltage
12V DC
Supply current @ 12V:
Peak (20ms at registration)
2A
Average standby
25mA
Call in progress
250mA
Ringing
250mA
NOTE -
The current requirements of the ZETA modem will scale with input voltage. The higher
the input voltage the lower the current consumption, the power consumption will remain
constant. Recommended input voltage is 12V.
The ZETA modem has the following input power supply protection:
»
On board voltage reverse polarity protection
»
Over voltage spike protection to 70V for 1mS.
»
ESD protection to +/-4KV contact discharge and +/-8KV air discharge.
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