DGM INSTALLATION AND MAINTENANCE MANUAL
14
700135-0000 Rev. O
2.9.2.2 P1
This connector must be plugged into P1 of the main board of the DGM. This
connector is polarized for proper installation.
2.9.3 RATINGS
Maximum Circuit Voltage
+-12VDC
Maximum Circuit Current
50 mA
Maximum Line Impedance
600 Ohm
2.10 RADIO FREQUENCY INTERFACE P/N 400605-0001 & P/N
900708-# (OPTIONAL)
2.10.1 GENERAL
This Polling Radio interface allows communications to the SYSTEM 3505 PRISM LX
via radio carrier. The circuit board assembly is used to interface the data
communications to/from the radio transmitter/receiver. The radio link is supervised.
The SYSTEM 3505 PRISM LX location must have polling radio option for proper
interface with the optional polling radio system.
2.10.2 WIRING
Field wiring for this board is not needed. The proper antenna and lightning protection
must be added for proper operation.
2.10.2.1 Terminals 1 and 2 (Channel A)
These terminals are not used with RF interface.
2.10.2.2 P1
This connector must be plugged into P1 of the main board of the DGM. This
connector is polarized for proper installation. A ribbon cable interface is used to
connect the radio transceiver to the data interface board.
2.11 FIBER OPTIC INTERFACE BOARD P/N 400506-0002
(OPTIONAL)
2.11.1 GENERAL
This circuit board assembly is used to interface the Fiber Optic Multiplex
communications line to the DGM. The Fiber Optic lines are supervised. The
SYSTEM 3505 PRISM LX location must have the Fiber Optic line driver for proper
interface with the optional Fiber Optic interface board at the DGM. This Fiber Optic
board is used when interfacing over fiber optic lines. The fiber optic lines should be
62 Micron with S/T style connectors. The fiber optic line must not exceed an overall
signal degradation of no more than -20 DB. By utilizing Fiber Optic lines, the DGM
signal may be repeated from DGM to DGM.
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