Videotec DCBD, Operating Instructions Manual, Page: 35 / 40

Page 13 MNVCDCBD_0351
Cables
In the diagrams used as examples, different types of lines have been used to show cables with different
functions:
telephone cable:
1.5 m, supplied with the keyboard.
video cable:
coaxial RG 59 or equivalent cable.
Over long distances we recommend a video transmission system using a twisted pair cable.
multipolar cable:
every pan & tilt control function is enabled/disabled by a relay inside the receiver.
Determine the total number of cables as follows:
• 7 wires for pan & tilt movement (230 V~ or 24 V~): right, left, up, down, autopan, common, earth (only for
230 V~)
• 6 reverse polarity control wires for lens (zoom, focus, iris)
•
4 common wire control wires for lens (zoom, focus, iris)
•
7 wires for preset management: 5 connected to reference potentiometers, +5 V
=
and earth
• 4 wires for the wiper
•
3 wires for the washer
• 2 wires for each auxiliary used
•
3 wires for power supply cable
Note: we recommend using different multipolar cables for low voltage and high voltage functions.
Minimum recommended section: 0.56 mm² (AWG 20) for high voltage wires (pan & tilt, wiper, washer)
0.34 mm² (AWG 22) for low voltage wires (lens, auxiliaries, preset)
0.75 mm² (AWG 18) for DTRX1 power supply wires.
cable for digital reception/transmission of controls:
2 wires for reception from the control unit (twisted pair telephone cable, section 0.22 mm.² AWG 24)
2 wires as necessary for transmission to the next receiver in cascade configuration (twisted pair telephone
cable, section 0.22 mm.² AWG 24)
Note: maximum connection distance is approx. 1200 m in RS485.
When more than one receiver is connected in cascade, two separate cables should be used for digital reception
and transmission of the controls (do not use multi-pair cables) between receivers.