RB900SG-ElpOS Connectors

This page contains connectors description of RB900SG-ElpOS modem.

Power supply connector

The power supply connector marked as PWR is a 2-pin connector for external DC power supply connection, which can handle voltage from range 5..30 V DC, 2.5 W max. continuous power. (for modem with internal battery).

Pin	I/O	Description
+	I	5..30 V DC, 2.5 W max. continuous power
-	-	Ground

Attention! An attempt to power terminal from a DC source outside of 5..30 V range may result in the physical destruction of the device.

Attention! Please note that it is prohibited to connect external power supply and the meter at the same time, as the power pins of power port and RJ45 port are internally shorted. In order to power the RB900SG-ElpOS from external source and communicating with the meter at the same time it is needed to prepare the proper cable, in which the pin 1 has to be removed.

Battery disposal

The RB900SG-ElpOS terminal contains a Li-Po battery.

SAFETY INFORMATION: Please connect power supply adaptor at least once every three to six months to avoid shortening battery life. Do not use any other supply adapters than those recommended. Keep the device away from water, fire, humidity or hot environments (do not long-term store and use in temperatures above 45°C). Do not attempt to disassemble, repair, or modify the device. Do not deliberately drop or impact this device. If the product appears to be bulging or any other visible abnormalities, stop using the product immediately and contact us or Elproma distributor. Please recycle this device at an approved disposal location.

CAUTION: Risk of fire or explosion or defeat the safeguard of equipment if the battery is replaced by an incorrect type. Disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, that can result in an explosion. High or low extreme temperatures or low air pressure at high altitude that the battery can be subjected to during use, storage or transportation. Leaving the battery in an extremely high temperature and/or low air pressure surrounding environment that can result in an explosion or the leakage of flammable liquid or gas. Please read and follow the above safety information when operating the device. We cannot guarantee that no accidents or damage will occur due to improper use of the device. Please use this product with care and operate at your own risk.

Main SIM card holder

External, main SIM card holder is placed at the front of the RB900SG-ElpOS modem (as shown below). To insert a SIM card into the holder, press the yellow button, eject the black drawer, place the SIM card inside it and insert drawer into the modem (you will hear "click"). To operate the module in a GSM/LTE network, it is necessary to insert active SIM card from the network provider.

Plik:RB900SG-ElpOS connectorssim.png

Antenna connectors

GSM antenna connector

SMA “ANT” input is used to connect external GSM/LTE antenna. To establish a connection with a GSM/LTE network, an external antenna must be used. Type of antenna depends of GSM/LTE coverage. In good circumstances (level of received signal is high) use antenna contained in the package. If the range of GSM/LTE is low or none, an outdoor or indoor (for instance in place where GSM/LTE range is sufficient) antenna should be used.
Note: If there is no antenna connected to SMA connector, the connection with GSM/LTE network is impossible.

Interfaces

Back

RS232/RS485 interfaces

The RB900SG-ElpOS modem is equipped with RS232/RS485 interfaces on RJ45 socket. Use the jumper to switch between interfaces as described in RB900SG-ElpOS QuickStart.

Table of RJ45 serial connector:

RJ45	RS232	RS422	RS485
1	VCC	VCC	VCC
2	-	TX-	DATA-
3	-	-	-
4	TX	TX+	DATA+
5	RX	RX+	DATA+
6	GND	GND	GND
7	DTR	RX-	DATA-
8	-	-	-

Pinout of the RJ45 - DB9 adapter (female) for the RS232 interface:

RJ45	DB9 female RS232
1 VCC	-
2 -	-
3 -	-
4 TX	2
5 RX	3
6 GND	5
7 DTR	-
8 -	-

USB interface

RB900SG-ElpOS modem is equipped with a USB interface (as shown below). Type of connector is miniUSB. It is used for device configuration.

NOTE: To configure the modem with SIM card inside, please plug also the power adaptor.