Chapter 1: Installation and wiring
20 Vigilant VS1 and VS2 Technical Reference Manual
SA-232 wiring
The optional RS-232 card can be wired to a printer to print system events or wired to
a computer to download to the panel.
Circuit specifications
• Serial communications
Asynchronous communications maximum resistance: 13 Ω
Maximum capacitance: 0.7 µF
• Wire length: 50 feet max.
• Signal voltage: +/- 10 V
• Operating current
Standby/Alarm: 13 mA
Max.: 20 mA
• Printer communication speed: 9600 baud
• Power-limited and unsupervised. Supervised when the Supervised Printer panel
programming option is enabled.
Figure 28: SA-232 wiring terminals
GND RTS
TXD RXD
Printer wiring
Note: The printer must be configured through programming for proper operation.
To install wiring to a printer:
1. Locate the serial port on the back of the printer.
2. Connect the DB-25 end of the RS-232 cable to the serial port on the back of the
printer.
3. Connect the other end of the RS-232 cable to the RS-232 card.
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