1040744B
February 2005
AL-1801 Serial Computer and Printer Interface
Installation Instructions
Description
The AL1801 Computer and Printer Interface board mounts on
the Alliance control panel and uses serial interface cables to
connect to a computer and/or printer.
The unit ships with the following hardware:
• 2 two-position terminal blocks
• 2 three-position terminal blocks
• 2 mounting screws
Installation
To install the unit, do the following:
1. Slide the terminal blocks together (Figure 1). If you are
using the AL-1632 (16 foot) or AL-1633 (49 foot) preas-
sembled interface cables, you will not need to use the
terminal blocks provided with the unit. However, you will
need a DB9 to DB25 adapter to connect either interface
cable to the printer.
Figure 1. Terminal block assembly.
2. Wire the terminal blocks to a DP9 or DB25 connector (see
Wiring) and slide the terminal blocks over the pins on the
unit (Figure 2)
Figure 2. Exploded view
3. Disconnect power to the Alliance control panel before
mounting the AL-1801. Slide the mounting pins located on
the bottom of the AL-1801 (Figure 2) into the J11 connector
on the control panel and secure the unit with the mounting
screws provided (Figure 3).
Figure 3. Mounting the AL-1801 on the Alliance control panel
4. Connect the AL-1801 to the computer and printer (see
Wiring). For a list of compatible printers, see the Alliance
Programming Manual or software management program.
Wiring
Use a 4-core shielded RS232 data cable (not twisted pair) with
DB9 or DB25 connectors (Figure 4) to connect the AL-1801
ports to the computer and/or printer. Maximum cable length is 50
feet (15 m).
Figure 4. DB9 and DB25 connectors
Table 1 shows the computer port wiring connections.
CAUTION
You must be free of static electricity before
handling circuit boards. Wear a grounding
strap or touch a grounded surface to
discharge static electricity.
DB9/DB25 connectors
Mounting pins
Computer port Printer port
RS232 data cable
Table 1. Computer port connections
AL-1801 Computer port Computer DB9 DB25
TXDA (red) RX 2 3
RXDA (green) TX 3 2
CTSA (white) DTR (Ready) 1, 4, 6 6, 8, 20
RTSA Not connected - -
GND (black) GROUND
Link RTS/CTS
Shield
5
Link 7/8
-
7
Link 4/5
1
AL-1801
Alliance
control
panel
1 2 3 4 5
6 7 8 9
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
DB9 connector
DB25 connector
AL-1801 Serial Computer and Printer Interface
Installation Instructions
2
Table 2 shows the printer port wiring connections.
Table 2. Printer port connections.
The CTS (clear to send) terminal signals the control panel that
the printer is ready to receive data from the printer DTR (data
terminal ready). The AL-1801 will not generate printer data
unless the CTS terminal is high (8 to 11 VDC). If the AL-1801 is
programmed to print correctly and no printout is occurring,
check the voltage on the CTS terminal. If it does not read high,
check the cabling and the printer’s DTR output settings.
Programming
The AL-1801 printer port can be programmed to provide real-
time printer output, or to print history alarm events stored in
memory. Baud rate and data format options can also be selected.
The computer port requires that a computer address be
programmed in the Alliance system programming menu. See the
Alliance Programming Manual for more information.
Specifications
Copyright © 2005, GE Security Inc. All rights reserved.
AL-1801 printer port Computer DB9 DB25
TXDB (red) RX 2 3
RXDB (green) Not connected - -
CTSB (white) DTR (Ready) 4 20
RTSB Not connected - -
GND (black) GROUND
Link RTS/CTS
5
Link 7/8-
7
Link 4/5
Current consumption 25 mA (standby)
80 mA max. (when both ports active)
Operating temperature 32 to 122°F (0 to 50°C)
Max. relative humidity 95% noncondensing
Dimensions 3.5 in. (90 mm) H x 3.4 in. (86 mm) W
Listings UL 294, UL 365, UL 609, UL 1610, UL 1615
GE Security
12345 SW Leveton Drive
Tualatin, OR 97062-9938
Technical Support
T: 888.437.3287
F: 503.691.7568
www.gesecurity.com
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