Installation Manual
8.0 Connections
22
For 24 V Power
: Two wires, insulated for 300 V minimum, 18 AWG cord for power. Use for distances
up to 80 feet (29 m) for 24 V cables.
For I/O
: 24 AWG insulated for 300 V minimum. Use for distances up to 250 feet (76.2 m).
For Analog Video
: The coax cable for analog video must be rated at 75 ohms, and must not exceed a
maximum attenuation of 6 dB at 10 MHz for the length of cable required.
For Data
: A shielded two twisted pair data cable is recommended. For lower baud rates (9,600 or less),
the Belden 8723 shielded cable is usually suitable for distances up to 750 feet.
If the RS422 interface
is used for sending and receiving serial data, an RS232/422 converter is used
between the camera system and a computer.
Typical RS232/422 Converter
RS422 Cable Wiring to B&B Converter
Camera Side
Converter Side
RS422 Camera
Camera Connector Pins
RS422 Device
RS422 RX+
M
TD(B)
RS422 RX-
N
TD(A)
RS422 TX+
S
RD(B)
RS422 TX-
R
RD(A)
8.7 4220HD Series CohuHD-Manufactured System Cables
CohuHD-manufactured cables are available for 4220HD Series camera systems:
CA279x series for 4224-1000-02 Series
8194602-xxx for 4220-1000-02 and 4228-1000-02
Cables are made with prepared leads and/or with combinations of connectors. “Prepared”, indicates that the
wire leads are stripped and pre-tinned with solder for attachment to a terminal strip or similar device.
Maximum cable length for camera systems with operating power of 24 V is 80 feet (29 meters). Maximum
cable length for camera system with operating power of PoE++ is 328 feet (100 meters).
For detailed information, download cable drawings from the CohuHD website:
http://www.cohuhd.com/Support/Product-Documentation
.
Note: Long cable lengths and/or low mains voltages can cause the 24 V power at the camera power
pins to drop below the minimum input voltage of 21.6 V (24 V -10%) resulting in unreliable operation.
Maximum input voltage at the camera power pins is 26.4 V (24 V + 10%).
