Aiphone MYH-2CD - Manual (Page 3)

2
NAMES & FEATURES
MY-2CD, MYH-2CD
Video monitor (4" CRT)
Door release button
Door call-in LED
ROOM call button
PanTilt control pad
BACKLIGHT control button
MONITOR button
Chime/pre-tone volume control (TONE)
Brightness control (BRIGHT)
Contrast control (CONTRAST)
A-B switch (SW1)
RESET switch
FEATURES
• Multiple PanTilt door & monitor system with a variety of configurations.
• Max. 3 inside monitor stations. Audio-only sub station(s) in place of sub station(s) w/monitor.
• Max. 2 PanTilt door stations.
• Optional audio door station.
• Monitor audio & video handsfree.
• All call type internal calling and communication.
• Door release button. Selective door release control with RY-3DL adaptor.
3
INSTALLATION --------------------------------------------------------
/i\ Precautions on wiring
1. Use parallel conductor cable to connect video door station. Do not use any other
cable like coax cable, individual wires, shielded wire, or twisted pair.
2. When existing chime wires are used, be sure to locate and disconnect the AC
transformer.
3. If unused wires exist in the cable, terminate each extra pair with a 120 Ohm
resistor at each end of wires (on audio sub station end as well). Extra wires can
interfere with video signal.
4. Keep audio/video wires more than 30cm(1') away from AC100~240V power lines.
It will cause noise in communication and possible malfunction.
5. Run internal wiring of audio/video system in such a manner that the cable is run
from master to sub without any splices, which will create inferior video quality.
YES
Wire monitor to monitor
(daisy-chain)
MK-DBC MY-2CD MYH-2CD MYH-2CD
NEVER
Homerun to master
YES
PARALLEL WIRE
NEVER
120 Ohm
COAXIAL CABLE
------^UNUSED WIRES
: 120 Ohm Q-
A2
(B2)|
MK-DBC
(or MY-2CD)
_ y
—Q a T]
r—SMI
MY-2CD
(or MYH-2CD)
NEVER include incoming & outgoing wires
in the same jacketed cable.
MYH-2CD
MY-1HD
Note: The above wiring method also applies to MY-1 HD audio sub station.