Power Supply From The Vm Amplifier To Remote Microphone - Toa VM-2120 Instruction Manual

Connection example 2
Remote
microphone
24 V DC
Power
supply
* TIA/EIA-568A standard Category 5 Shielded Twisted-Pair cable (straight type)
Abbreviated to "Cat. 5 STP cable."
The total length of LINK-to-LINK connection cables (Link cables) must be under 800 m (when connected using
Category 5 STP cable).

7.4. Power Supply from the VM Amplifier to Remote Microphone

The VM amplifier can only supply power to one Remote Microphone. Therefore, each of the remaining
Remote Microphone(s) needs to have a 24 V DC power supply (AC adapter) of its own.
(1) Power supply via Link cable
(2) Power supply using cables other than Link cable
VM amplifier
4-pair twisted pair shielded cable
Cable resistance (one way)
200 Ω/km
100 Ω/km
50 Ω/km
16
Link cable* LINK connector (RJ45)
a b
Master VM
Remote
microphone
PRE OUT jack
a + b + c + d + e
VM amplifier
Up to 800 m via Category 5 STP cable
Category 5 STP cable: 93.8 Ω/km or less
Link cable
Wall connector (RJ45)
Example: Up to 200 m via 200 Ω/km cable
Extension length
Up to 200 m
Up to 400 m
Up to 800 m
c
Sub-VM
amplifier amplifier
POWER AMP IN jack
Audio cable
800 m
Link cable
4-pair twisted pair shielded cable
Wall connector (RJ45)
Under 40 Ω (one way)
d e
Remote Remote
microphone microphone
24 V DC 24 V DC
Power Power
supply supply
Remote
microphone
microphone
Link cable
Remote