User guide

6615-2203

Antenna

Frequency bands GSM900 TX 880 – 915 and RX 925 – 960 MHz

GSM1800 TX 1710 – 1785 and RX 1805 – 1880 MHz

Data rate CSD: up to 14.4 kbit/s, GPRS: up to 85.6 kbit/s

Connection SMA female, impedance: 50 ohm

Isolation to Power port 3 kVrms 50 Hz 1 min

SIM

Electrical specification 3 volts SIM supported

Isolation to Power port 3 kVrms 50 Hz 1 min

RS-422/485

Electrical specification EIA/TIA-485 ITU V.11

2-wire or 4-wire twisted pair

Data rate 1 200 bit/s – 115.2 kbit/s

Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits.

9-11 bit words

Protocol Transparent

Retiming Yes

Turn around time <10 ms (half duplex)

Transmission range ≤ 1200 m, depending on data rate and cable type (EIA RS-485)

Settings 120 Ω termination and failsafe biasing 680 Ω

Protection Installation Fault Tolerant (up to ±60 V)

Isolation to Power port 3 kVrms 50 Hz 1 min

Connection Detachable screw terminal

Connector size 0.2 – 2.5 mm

(AWG 24 – 12)

Shielded cable Not required*

Miscellaneous Do not connect RS-232 and RS-422/485 simultaneously

* Railway installation close to the rails.

For a cable located inside 3 m boundary and connected to this port, the use of shielded cable is recommended,

this is to minimise the risk of interference. The cable shield should be properly connected (360°) to an earthing

point within 1 m from this port.This earthing point should have a low impedance connection to the conductive

enclosure of the apparatus cabinet, or similar, where the unit is built-in.This conductive enclosure should be con-

nected to the earthing system of an installation and may be directly connected to the protective earth.