Owner's Manual

12
Wiegand Accessories
The two AM-3 Wiegand inputs (READER A & B) can connect to a large
variety of 26, 30, and 31-bit Wiegand output accessories. The Wiegand
format is a common standard for access control equipment. A typical
application would be to add swipe card or proximity readers to the
system.
✦ NOTE: Depending on the Wiegand accessory used, the LED1,
LED2, and HOLD connections may not be required.
• LED1 output is switched to ground during non-access time.
• LED2 output is switched to ground for one second during access
time.
1. Mount and install the Wiegand accessory as described in its
installation instructions.
2. Route a cable from the AM-3 to the accessory.
• For wire runs up to 300 feet use 24 AWG Belden 9931 or
equivalent.
• For wire runs up to 500 feet use 20 AWG Weico 9405 or
equivalent.
3. Connect the cable to the accessory and the AM-3 as shown in the
fi gure.
RS-232 Port
A modular connector is provided for the bi-directional 38.4K baud RS-232
port. The AM-3’s RS-232 port connects to a personal computer’s COM
port. System programming can be performed locally with a computer
connected to the RS-232 port.
217977 A IMAGE 12
REMOTE
WIEGAND
DEVICE
LED2
HOLD
LED1
DAT1
DAT0
GND
DAT0 DAT1 LED1 HOLD LED2 GND
AM-3
READER
TERMINALS
PWR
PWR
NOTE: THE LED1, LED2, AND HOLD
CONNECTIONS MAY NOT BE REQUIRED
DEPENDING ON THE WIEGAND DEVICE USED
AM-3
RS-232 PORT
COMPUTER'S
COM PORT
LINEAR MODEL A2C
SERIAL COMPUTER CABLE
SET COMPUTER COM PORT
BAUD RATE TO 38,400 BPS
NOTE: USE A DB-25 TO DB-9 CABLE ADAPTER IF REQUIRED