User`s manual

VPort 251 User’s Manual Introduction
RS-232/RS-422/RS-485 COM port
The VPort 251 has 1 COM port for PTZ control. This COM port is an RS-232/RS-422/485 serial
port with 5 pin terminal block connector. The pin assignments are as follows:
PIN RS-422/485 RS-232
1 GND
Ground
GND
Ground
2
R
-
Rx- ---
N
/A
3 R+
Rx+
RxD
RxD
4 T-/D-
Tx-/ Data- --- N/A
5 T+/D+
Tx+/ Data+
TxD
TxD
To enable PTZ control, users should configure the PTZ control protocol in the web console.
NOTE
The PTZ control protocol is not standardized. To use a particular PTZ control protocol, the video
encoder must support the driver for that protocol. Currently, the VPort 251 supports PTZ control
protocol drivers for:
1. Pelco D
2. Pelco P
3. Dynacolor DynaDome
In addition, there is an item named “Transparent PTZ Control” in the camera driver list, which is
to transmit the PTZ control signal via TCP/IP network to the VPort D251 video decoder or PC
(additional Real COM driver required), and the PTZ control panel or keyboard can directly
control the PTZ camera or device. In this way, there is no need for PTZ camera driver and better
than that, you don’t have the protocol limitation for using PTZ camera with VPort encoders.
In addition, to use a protocol that is not on the list, you will need to contact the manufacturer of
the camera to get the PTZ control commands, and then use the VPort 251’s custom camera
function to program the PTZ control.
NOTE
The VPort 251 comes with a PTZ driver upload function for implementing new PTZ drivers.
Please contact a Moxa sales representative if you need assistance from Moxa’s R&D department
to create a new PTZ driver.
12/24 VDC and 24 VAC power input and loop-through power output
VPort 251 is powerd by 12/24VDC or 24VAC power adaptor with power jack connector. In
addition, a loop-through power output in 2-pin termina block connector type is aslo provided for
poweing the external device, such as camera. Since the power input and output is loop-throughed,
the 2-pin power output can also be used as an alternative power input connector.
NOTE
The supported power input specifications for the VPort 251 series are 12-32 VDC for a 12/24
VDC power input, or 18-30 VAC for a 24 VAC power input.
1-8