Edwards Signaling eFSA250 - Manual (Page 33)

Chapter 1: Installation and wiring
E-FSA64 and E-FSA250 Technical Reference Manual 21
SA-232 wiring
The optional RS-232 card can be wired to a printer to print system events or
wired to a computer to read from and write to the panel using the configuration
utility.
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 or alarm): 13 mA nominal, 20 mA max.
• 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.