JRC Alphatron LT-3100 Iridium, Руководство по установке и эксплуатации

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27 | Interfaces
6 Interfaces
This chapter describes the external interfaces to the LT-3110 Control Unit, including the coaxial cable
interface to the LT-3130 Antenna Unit.
6.1 DC input
The Alphatron LT-3100 Iridium is designed to be used on 12 Vdc and 24 Vdc power buses (nominal).
External DC power to the system is provided by connecting the 3 m power cable delivered by
Alphatron Marine. The power connector is mounted on the back side of the LT-3110 Control Unit and
marked ‘PWR’, see Figure 3 on page 17.
NOTE
The input voltage range is: 10 - 32 Vdc. The LT-3110 Control Unit DC input connector
and circuit is protected and certified for Reverse Polarity Protection. Use only the 3
m power cable delivered by Alphatron Marine.
6.2 Chassis ground
The chassis ground connector is placed on the back side of the LT-3110 Control Unit and marked with
‘GNDC’, see Figure 3 on page 17.
6.3 SIM card
The Alphatron LT-3100 Iridium requires a SIM card to be operated with the Iridium® satellite services.
The Iridium® SIM card must be bought from one of the official Iridium® Service Providers. A list of
Iridium® Service Providers can be found at the Iridium® website: https://www.iridium.com (select
‘Services’, and hereafter ‘Voice’).
The Alphatron LT-3100 Iridium is supporting pre- and post-paid SIM card subscriptions.
The SIM card must be inserted in the LT-3110 Control Unit behind the rubber dust cover. Make sure
that the LT-3110 Control Unit is powered off before opening the rubber dust cover. When the SIM
card is properly inserted in the slot, and the rubber dust cover is secured, the LT-3110 Control Unit
can be powered up. The rubber dust cover is illustrated in Figure 3 on page 17 and marked with
‘SIM’.
The following procedure must be followed when inserting, replacing, or removing the SIM card:
1. Turn off the power to the LT-3110 Control Unit
2. Remove the rubber dust cover on the back side of the LT-3110 Control Unit
3. Slide the SIM card holder as illustrated with the arrows on the PCB print, to unlock
4. Open the SIM card holder and insert or remove the SIM card
5. Close the SIM card holder
6. Slide the SIM card holder as illustrated with the arrows on the PCB (opposite direction), to
lock
7. Re-insert the rubber dust cover
8. Turn on power to the LT-3110 Control Unit