CBC ZR-DH1621NP - Manual (Page 17)

2. 1 Power Setup
Select power (AC 115V/AC 230V) by AC
Selector according to input voltage.
• If set as figure 1, AC 115V is selected.
• If set as figure 2, AC 230V is selected.
2. 2 Telemetry Connection
Multiple DVRs and keypads may be
connected via RS-422 (PORT A). Up to two
PTZ serial communication lines are
supported via RS-485/422 (PORT A, PORT
1 & PORT 2).
2. 2. 1 PORT A RS-422
There are two RJ-11 connections for PORT
A which can be used to “chain” the DVR with
other devices. The primary use of PORT A is
to interconnect two or more DVRs and/or
keypads (optional).
PORT A can also be used to connect PTZ
cameras by using the RJ-11 Terminal Block.
2. 2. 2 PORT B RS-422/RS-485
PORT B is a 5-pin terminal connection. It
can be used as either a full-duplex RS-422
port or a half-duplex RS-485 port.
Use this port to connect PTZ cameras,
DVRs or keypads (optional).
Note
Even though there are two physical
connections PORT A is a single port
designed to connect multiple devices in
a single communication line.
Figure 1
Figure 2
2 Setup and Connections
7