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Chapter 3
Communication Ports
3.
Insert the SIM card with the angled side first. An audible click will indicate the SIM card is in position.
4.
Install the access panel.
5.
Connect power to the device.
Supported Frequency Bands
WARNING!
Electromagnet radiation hazard – risk of serious injury. Do not exceed the maximum antenna gain.
Aside from causing cellular interference for other devices that use the same band, adverse health
effects for individuals in the area may occur.
Band
GSM 850
EGSM 900
GSM 1800
GSM 1900
Section 3.10
Connecting Multiple RS485 Devices
Each RS485 port can communicate with multiple RS485 devices by wiring devices together in sequence over a
single twisted pair with transmit and receive signals on the same two wires (half duplex). For reliable, continuous
communication, adhere to the following guidelines:
• To minimize the effects of ambient electrical noise, use shielded cabling.
• The correct polarity must be observed throughout a single sequence or ring.
• The number of devices wired should not exceed 32, and total distance should be less than 1219 m (4000 ft) at
100 kbps.
• The Common terminals should be connected to the common wire inside the shield.
• The shield should be connected to earth ground at a single point to avoid loop currents.
• The twisted pair should be terminated at each end of the chain.
The following shows the recommended RS485 wiring.
30
Tx (MHz)
VSWR
824-849
<2.5:1
880-915
<2.5:1
1710-1785
<2.5:1
1850-1910
<2.5:1
Frequency Range
Rx (MHz)
869-894
925-960
1805-1880
1930-1990
RUGGEDCOM RX1000
Installation Guide
Maximum
Allowable
VSWR
Gain (dBi)
<3.5:1
5
<3.5:1
5
<3.5:1
4
<2.5:1
4
Connecting Multiple RS485 Devices
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