ZETRON 025-9581M, Installation And Maintenance Manual

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Wiring Connections to the Model 620x
Transponder number assignment is done by setting SW2 and SW1 on the transponder
mother board. See
Setting the Unit Number on page 57 for a complete description of this
process.
Serial Port Programming
The serial port programming for the station transponder unit is accomplished in the same
way that it would be if the unit was being used in an IP FSA system. Some of the timers
are set to longer values to allow for the limitations of the FFSK signaling method and
radio key up delays versus the speed of IP/TCP over an Ethernet connection. Some of the
more significant differences are:
• Communications Modes — Model 26 systems will use all of the possible
Communications Modes (option number 4 in the Station Configuration menu), this
includes wire-line, COR (both types), VOX, and Trunking. Set the Model 620x unit
to use the same communication mode as the existing Model 6 units in the system.
For more information on what these modes actually do, see the original Model 6
transponder manual.
• Timers — The timers in the Station Configuration menu (options 5 through 9) have
been set fairly short at the factory in anticipation of the unit ending up in an IP FSA
system. Set these timers to the same values used by the other Model 6 station
transponders already in the system.
• PA Options — When used the Model 620x as a Model 6 replacement, open the PA
Options menu and set option 1, the 5 Minute Fail Safe Timeout, to Enabled . The
following two options in this menu should be set to Disabled . The fourth option
(Allow Handset use when PA on) disables itself when its most recent command
comes from a Model 26.
Wiring Connections to the Model 620x
Wiring connections to a Model 620x used in a Model 26-based system will differ from
those used in an IP FSA system for two reasons:
• The power supply and relay board in the Model 620x is laid out differently.
• The unit may be connected to a wire line or radio for passing FFSK data packets.
Inputs and Relays
While the relays and sense inputs of the Model 620x function just as they did in the Model
6, their physical layout is different.
The general instructions for connecting to the sense inputs can be found under Sense Input
Connections on page 115. A detailed description of the sense inputs can be found under
Sense Inputs (P7 - P8) on page 156.