User Manual

Asset-Link 4XX User Manual May 10, 2004

970-00047 Rev. 1.0

4.1.2 Cellular Connector Shield

The shield on the cellular connector is directly connected to the Asset-Link ground.

For best results use keep the shielded cable from the cellular connector against or

surrounded by the metal frame.

4.1.3 Cellular Center Pin Voltage Protection

The Asset-Link cellular Center Pin is protected for up to +/-36 volts application of

D.C. As this connection is not expected to be used for vehicular voltage I/O it is not

expected that voltage will be applied to this pin.

4.1.4 Cellular Center Pin Short To Ground or Open Protection

The Asset-Link cellular Center Pin has protection for application of a connection to

“Ground” or a “Open”without damage to the cellular transmitter electronics. For this

test, the shell of the connector is ground.

4.1.5 Cellular Center Pin Over Current Protection

The Asset-Link cellular Center Pin has a high impedance to ground. This pin should

not conduct current for application of normal vehicular voltages.

4.1.6 Cellular Center Pin ESD Protection

The Center Pin will withstand an Electrostatic Discharge (ESD) of ±15Kv. The

discharge network of 150pf/150ohm with a low impedance ground return follows the

standard IEC 1000-4-2. This ESD is of greater energy than the requirement of

Electrostatic Discharge per SAE J1211 section 4.11, and ensures operation after ESD

testing. The Asset-Link ESD test pass/fail is a functional test at the completion of the

discharges.