GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 17)

PL1877A Microprocessor Radio Telephone Interconnect Installation
11 12/10
Ground Cable
The PL1877A is designed with a high degree of protection against electro-static discharge (ESD), power
line surges and telephone line surges. The protection circuitry is designed to shunt the transient current
to earth ground through the GND terminal, located on the back panel of the unit. This terminal must be
connected to a high quality earth ground in order to obtain maximum protection. All equipment at a site
should be bonded frame-to-frame with adequately sized conductor.
N OTE : This ground should be connected through a utility entrance ground cable and the telephone
entrance ground cable, if different from the utility ground. Lightning is essentially RF, and as such does
not like long leads or sharp bends. Make connections appropriately.
Power Supply
An optional ac power supply (XAC0001A) is available from GAI-Tronics, if power is not available from
the radio. The Model 3308-00750-10 Power Supply is designed for use with 220 V ac applications.