SERIAL PORT RS232: 1, rear, to interconnect the internal GSM modem to PTT-SR3S telemetry.
ANALOG INPUTS: 4, level 0-2.56V with Zin=220Kohm; all inputs with RF filter and overvoltage, overcurrente reverse polarity protection.
RF-detector INPUTS: 8, are used for the detection of the possible absence or decrease in the RF signal. Each input is programmable independently by its trimmer accessible in the front panel. The operation has a delay of 2sec. while the recovery is immediate. Each channel accepts signals from -16dBm to +12 dBm at a bandwidth from 10MHz to 2GHz.
DIGITAL INPUTS: 8, are optoisolated and activated in voltage (1.8 .. 15V), in current (1 .. 15mA) or even a dry contact, through the activation of the pull-up resistor (internal to the remote PTT SR3S). Each input is independently configured protected by overvoltage and reverse polarity. Inputs should be used as an alternative to RF-detector, or in mixed configuration.
DIGITAL OUTPUTS: 4, are electrically isolated from the rest of the system through the relays. In AC-OUT configuration, the current is 5A per contact max at 230Vac with a maximum total power output of 1400VA and switching both poles. In N.O.-OUT configuration, the current is 5A per contact max at 30Vdc, with normally open contact. Each output is protected by a 6.3 AF.
MAINS VOLTAGE C.A.: 230Vac +/- 20% Freq. 50/60Hz
DC OUT : this output is used to power the remote PTT-SR3S with a backup voltage of 12V Nominal. (13.7 V + 1.5%), ensuring an autonomy of about 24 hours in absence of mains (with GSM modem on), thanks to a VLRA battery of 12V 2.3 Ah. If the internal modem is not used, this output can be used to power an external GSM modem.
VISUAL INDICATIONS:
-mains or power supply
-RF-detector status.
-GSM modem status.

MODEM GSM/GPRS dual band: inside.

Pmax: 1400VA with maximum load on outputs, configured as AC-OUT.
COOLING : no fan needed.
OPERATING TEMPERATURE RANGE: -10..+40°C
DIMENTIONS : Rack 19" 1U prof.230mm
WEIGHT : 2.7Kg