SilentKnight VisorAlarm Plus 2U - Manual (Page 17)

VISORALARM - Installation
II - 15
Doc.DM374-I
Ver.1.0
c) Connecting the printer
Connection to the printer is carried out through the serial interface labeled PRN in the device. This
serial interface complies with the V.24 norm, behaves as DCE and has a female DB25 connector. You
need to use a DB25 male serial cable to a DB9 female in order to connect to the printer.
IMPORTANT: Do not use a null modem crossover cable.
WARNING: in UL Listed Installations, always use a UL Listed printer.
When the VisorALARM is connected to a printer, the LED on the front panel labeled PTN will light
up in green. If there is no connection, the LED will light up in red.
d) VisorALARM Expansion Card
The VisorALARM PLUS 2U is supplied with three slots where three VisorALARM Expansion Cards
can be plugged in (Labeled as VA-UD in the rear panel). The device is supplied with one VA-UD in
the factory configuration.
The following figure shows the VA-UD connectors:
Figure 6. VA-UD Connectors
• Connectors COM1 and COM2
The data connection to Uploading/Downloading Software is carried out through these two connectors.
The serial interface complies with the V.24 norm, behaves as a modem and has a female DB25
connector. At the same time two separate data connections can be made for each VA-UD.
• Connector I/0
The following figure shows the arrangement of the connector outputs and inputs.
VA-UD