Rs-232 Interface - March Networks 8704 S Hybrid NVR Installation Manual

RS-232 Interface

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