User's Manual GSM Terminal GT340
Device Description
3.5 Power supply
GSM Terminal GT340 must be powered with DC power supply in range from 8V to 30V. Follow
polarity designation on the rear panel of the device. Device has overvoltage protection (TVS
diode) and it is protected against reverse polarity (serial diode).
One can choose optional AC/DC adapter for wall mounting, or industrial grade power supply
for 35mm DIN rail mounting. For ordering details see chapter
2.2 Accessories
.
The power supply of the device can be controlled using the DTR pin on the RS232 port. On the
rear panel of the device, it is necessary to remove two torx screws using the T8 screwdriver.
Remove the back panel and carefully remove the PCB out of the case.
The jumper PWR_EN (close to the RS232 connector) defines how the power is turned on:
- in place – power is always ON
- removed – the power is turned ON by the DTR signal on the RS232 port
Choose how to turn on the power, return the PCB to the case, and mount the rear panel.
3.6 DIN rail mounting holder
DIN rail mounting holder can be mounted on the device and secured by two screws M3x5
(included with holder). For ordering details see chapter
2.2 Accessories
.
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Fig. 9: Power supply 24V 15W,
35mm DIN rail mount, 17.5x90x58.4mm
Fig. 8: AC/DC adapter 12V 12W,
wall mount, 25x75x40mm
Fig. 10: 35mm DIN rail mounting holder