IN00126 - Issue 2 July 2003 - Page 1 of 2
Installation Note
SP500-GP Switch Plate Reader
IN00126
The SP500 Reader must be connected to a power supply and to a host access
control system.
Mounting and connecting
1. The SP500 Reader fits a standard single surface-mount or flush fitting
back box, either metal or plastic, such as is used for light switches and
mains plug sockets. The cover which clips onto the front of the Reader
is 86mm square, so remember when you install the back box to leave
enough clearance around it to fit the cover.
The Reader has a range of 5cm to 30cm (2in to 12in) dependent on the
type of tag and back box used (a metal back box may result in a 10%
reduction in range compared to a plastic box), so it must be mounted in
a position where the card or tag can easily be brought within this
distance.
2. The connections required for the Reader are power supply connections
(0V and +12V DC or +24V DC), data output connections for Wiegand or
Magnetic Stripe (D0, D1, DA) or ASCII/TTL (H, D0, DA), and a
connection from the host to the Data Hold input (H) if data lines from
two Readers are to be connected in parallel.
To promote EMC compliance we recommend you use 812 Cable as
described here. If the Reader is mounted in a plastic back box then
connect the screens at the host end only; at the SP500 the screens
must be cut back and insulated. If the Reader is mounted in a metal
back box then the overall screen must be connected at the host end and
also to the metal back box. Do not connect any of the screens to the
SP500 itself in either of these situations.
Route the cables into the back box, then make the connections shown
in the table below.
Reader Function
V+
Power 12V unregulated or 24V battery-backed*
(absolute max 32V, min 10.6V, 100mA max)
0V
Power supply 0V (-ve)
(also ground reference for data output)
H (C)
“Data Hold” for Wiegand and Mag Stripe, “CTS” for ASCII/TTL
D0 (D)
“Data Zero” for Wiegand, “Data” for Mag Stripe, “TXD” for ASCII/TTL
D1
“Data One” for Wiegand, “Strobe” for Mag Stripe
DA
“Data Available” for Wiegand, “Present” for Mag Stripe, “RTS” for ASCII/TTL
HRN (Adr)
Horn - 0V to sound, +5V to turn off
R
Red LED control - 0V for red LED
R/G
Single wire LED control - 0V for green LED, +5V for red LED
TAMPER
Tamper circuit connection (hard wired link)#
