Stanley iPAC Guide D'installation page 5

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Introduction
This document is intended for experienced engineers who are familiar with PAC products and
health and safety considerations. The iPAC can be connected to slave PAC 512 controllers on the
RS-485 network.
Note
It is recommended that all controllers on the system have the same firmware version number.
Therefore, a firmware download to the controllers may be required. See the help file for details.
Tamper and Override Terminal
Because tamper and override are normally closed switches, use a short piece of cable to link the
TAMP and 0V terminals and OVRD and 0V terminals before powering up.
RS-485
If shielded cables are used, to avoid ground loops, the shield for each cable must be connected to
'SCRN' at only one controller. The first and last controllers in the chain (and no others) must have
the RS-485 termination jumper linked (set to IN). The red RS-485 LED indicates when the controller
is transmitting data and the green RS-485 LED indicates when there is data on the network.
Lock Suppression
All locks must be fitted with a means of suppressing back EMF ('spikes') generated by most
electric releases, especially magnetic locks. All readers and controllers supplied by PAC are
supplied with a Metal Oxide Varistor (MOV). If large currents are used (i.e. >1A) use the large
MOV supplied with the controller. If small currents are used (i.e. <1A) use the small MOV supplied
with the reader. The MOV will prevent long term damage being done to the controller. Whenever
possible this device should be fitted across the lock terminals. If for any reason, the lock terminals
are inaccessible, the MOV may be fitted across the lock output. If a diode is already connected
across the lock terminals, this must be removed, otherwise it will override the action of the MOV.
Lock Relays
The lock relays are protected by a 2A @ 30V circuit breaker in line with the RELAY COM
connection. These will be automatically reset when overload has been removed; both lock outputs
are independent.
After Installation
Press the yellow button to obtain help information.
The USB pen must be compatible and FAT16 or FAT32 format (see TB224).
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