Doc No. FM5600 issue E Page 14
11. MASTER & SLAVE BASE INSTALLATION
VOLTAGE DROP
On installations with multiple Slave Bases connected on a single pair power cable from a central PSU it is
important to check the supply voltage is no less than 8V DC at the furthest point. Voltage drop is a result of
the cable resistance, the longer the cable and the greater the number of Slave Bases connected will
increase the voltage drop. If the voltage drop becomes too great then an additional PSU must be fitted at a
remote point in the wiring network. Note: the 0V connection must be common to all PSU’s.
END OF LINE RESISTORS
The first and last unit connected on the RS485 bus must have the End of Line (EOL) Jumper fitted.
Fit the Jumper on the 2 pins on the first and last unit, leave Jumper fitted on one pin on all others.
12. MULTI-HOP WIRELESS SLAVE INSTALLATION
The Multi-Hop Wireless Slave (Aidcall Part No: ZNC574) is a transceiver which is controlled from the Master
Base but links via a Repeater to extend the coverage area of the Paging system. The Wireless Slave can then
link to up to 4 other Wireless Slaves in a daisy-chain format to make multiple hops (max 5).
Note: the Multi-Hop Wireless Slave does not support acknowledgement of messages from group calls.
A Wireless Slave needs to be set to an ID which is HIGHER than any Repeater or other Wireless Slave it
requires to link back to the MASTER. Try to avoid ID’s 2, 3 and 4 which are normally reserved for Wired
Slaves. The same rules of no overlapping coverage of identical ID’s still apply. Programming of the ID’s is as
per the normal Repeater using the Master Base Programmer.
Wireless Slaves are supplied with a plug-top PSU & standby battery the same as standard Repeaters, these
will require an un-switched 13A mains socket outlet at high level in the positions required.
Fit both Data Jumpers on
all Master and Slave Bases
Fit EOL Jumpers on first and last units
on the RS485 Bus Cable only
No Battery
Back-up
Jumper Fitted
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