Videotec DTRX3 - Manual (Page 36)

Page 6 MNVCDTRX301_0850
4.4 Cables
Different types of stroke have been used in the example, in order to indicate cables with different
functions:
phone cable:
1,5 m equipped with the keyboard.
video cable:
RG 59 coaxial cable or equivalent cable.
For long distances a video transmission system on twisted pair is suggested.
multipolar cable:
each control function of the positioning device is activated /deactivated by a relay positioned inside the receiver.
Choose the final numbers of wires according to the following directions:
• 7 wires for the motion of the positioning device (230 V~ or 24 V~): right, left, up, down, autopan, common,
ground (only for 230 V~)
• 6 wires for the control of polarity reversal lenses (zoom, focus, iris)
• 4 wires for the control of common wire lenses (zoom, focus, iris)
• 7 wires for the preset control: 5 wires connected to the reference potentiometers, +5 V
=
and ground
• 4 wires for the wiper
• 3 wires for the washer
• 2 wires for each auxiliary device used
• 3 wires for the power supply cable
Note: We recommend using different multipolar cables for high tension and low tension functions.
Minimum section area recommended:
0,56 mm² (AWG 20) for high tension wires
(positioning device, wiper, washer)
0,34 mm² (AWG 22) for low tension wires
(lens, auxiliary devices, preset)
0,75 mm² (AWG18) for power supply cable of DTRX3
cable for the digital reception/transmission of commands:
• 2 wires for the reception from the control unit (twisted telephone pair, section 0.22 mm.² AWG 24)
• 2 wires for the possible transmission to the next cascade-connected receiver (twisted telephone pair, section
0.22 mm² AWG 24)
Note: Maximum distance for the connection: about 15 m in RS232; 1500 m in Current Loop; 1200m in RS485.
WARNING! If many receivers are cascade-connected, it is necessary to use two separated cables for
the digital reception and transmittion of commands (do not use multicouple cable) between the receivers.