8704 S Hybrid NVR (Gen 2) Installation Guide
17
Feature Overview
RS-232 Interface
There is an RS-232 interface on the back of the unit.
Pinout
RS-232 Interface
The RS-232 interface allows you to provide text capture, with the following pins:
You can also use this to control a PTZ camera with an RS-232 to RS-485 converter.
Relay
RS232
Audio Out
NC
C
NO
Rx
G
G
1
A1
G
A2
Tx
1
G
2
Alarms
Audio In
Pin
Rx
G
Tx
Definition
Input
Ground
Output
RS-232 interface