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HMD70U/Y Transmitters

Operating Manual U303en-1.1

6 1997-07-31

3.4.1 Connection to an AC supply

The HMD70U/Y transmitters can also be connected to an AC supply without

an external rectifier. However, when more than one transmitter is connected to

one AC transformer, a common loop is formed and there is an increased risk

of a short-circuit. To avoid this, use a separate floating supply for each

transmitter (see Figure 3.4.1.1). However, if several transmitters have to share

one transformer, the phase (∼) must always be connected to Us connector in

each transmitter (see Figure 3.4.1.1).

HMD70U/Y transmitter

Controller

VAC

GND

signal

RH/T

GND

RH/T

signal

HMD70U/Y transmitter

Controller

shared

common line

VAC

GND

RH/T

signal

Figure 3.4.1.1 Connection to an AC supply

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