Lock Suppression; Key To Wiring Diagram - PAC 512 Quick Start Manual

Introduction
This document is intended for experienced
engineers who are familiar with PAC products and
health and safety considerations. An installation
diagram is given. Further information on hardware
installation is given in the installation guide
provided on CD. Information on software
installation and operation is given in
documentation and help files provided with the
administration software.
Note
It is recommended that all similar controllers on
the system have the same firmware version
number. Therefore, a firmware download to the
new controller 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. OVRD can be
configured for EOL operation if required.
RS-485
If shielded cables are used, connect the shield on
one controller to 'Earth'. 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 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. The lock relays are protected by a
3A circuit breaker in line with the RELAY COM
connection. These will be automatically reset
when overload has been removed; both lock
outputs are independent.
4
Key to Wiring Diagram on Page 2/3
1 RS-485 Network Cable
2 Reader
+V
LED
SIGA/SIGB
0V(tamper/DC)
0V(sounder)
0V
3 Fail-Safe Lock
4 Request to Exit
0V(RTE)
0V
5 Battery Backup
6 12V/12-28V Power Supply Unit
VIN
0V
MSTAT
+
-
EARTH
7 Desktop Reader Power Supply
8 Desktop Reader
9 PC Interface Unit
10 Line Driver for PAC 512
11 Tamper Switch
12 RS-232/PC Channel
13 RS-485 Termination Jumper
14 RS-485 Status LEDs
15 RS-232 Status LEDs
16 DOOR 1 LEDs
17 DOOR 2 LEDs
18 Reader Data - SIG A/ SIG B pull up:
Both door channels pulled up to 5V or
12/24V or rely on reader to pull up line.
19 One-Touch™ Button
20 System Status LED
21 Power Access
22 Ethernet Connector
23 Ethernet Connection for PAC 512 IP
English
Red
Brown
White
Blue
Yellow
Black
Blue
Black
Orange
White
Pink
Red
Black
Green/Yellow
17474v4.0