Xantech PA635 installation instructions Connecting the REMOTE MASTER ON/OFF CONTROL Terminals

Page 16 Model PA635

Connecting the REMOTE MASTER ON/OFF CONTROL Terminals

As mentioned under "PA635 PANEL AND FEATURE DESCRIPTIONS", the REMOTE MASTER ON/OFF CONTROL terminals allow the power to the entire PA635 to be turned ON and OFF by a remotely applied DC Voltage. Fig. 10 is a typical applications using this feature.

Using a DC Power Adapter as a Control Voltage

Fig. 10 illustrates how a PA635 can be switched ON and OFF via the switched AC outlet on the rear of a preamplifier or other control center. When the preamplifier Power Switch is switched ON, power is applied to the DC adapter which in turn applies 5 V to 30 VDC to the PA635, switching it ON. Similarly, when the preamplifier is switched OFF, the DC voltage to the PA635 is removed, turning it OFF.

CAUTION: The output voltage of some adapters, such as the 781RG, drops off too slowly to provide a quick turnoff for the PA635. Therefore, when using any adapter (12 VDC max), always connect the included 220 Ohm 1 Watt resistor in shunt with the REMOTE MASTER ON/OFF CONTROL terminals as shown in Fig. 9. Failure to do so may result in blowing of the power line fuse (item #10, Fig. 3).

NOTE: Do not use the 220 Ohm resistor when connecting to the CO terminals of a ZPR68!

This must be the positive (+) lead (white striped lead on Xantech Power Supply Adapters)

PA635

(portion of rear panel)

Preamplifier, Control Center, etc.

	COMMON
	AUDIO
	BUS
LEFT	RIGHT	WARNING
REMOTE		TURN POWER
		OFF BEFORE
MASTER	LEVEL	CHANGING
(+) ON/OFF		MODES
	RESET
CONTROL

®

-- +

CI GROUND STATUS IR IN

5V to 12 VDC Adapter,

such as a Xantech 781RG,

plugged into a Switched AC Outlet on Preamplifier

CAUTION:

You must use the included

220 ohm resistor.

Figure 10 – Using the Remote Master On/Off Control Terminals

A Multi-Zone Power Managed System, using a ZPR68, a GATEKEEP-IR™and a PA635

Fig. 10 shows a PA635 in a typical multi-room system with a Xantech ZPR68-10 six-zone preamp and a GATEKEEP-IR. The PA635 has been designed specifically to work well with both Zone and All-Zone ON/OFF management as rendered by the ZPR68-10.

In this example, the STATUS & GND output (0 to +12 VDC) of each zone of the ZPR68-10 is connected, via a 2- conductor lead, to the CI & GROUND of each amplifier pair on the PA635.

This causes the ON/OFF condition of any given ZPR68-10 Zone to turn it's corresponding amplifier pair ON/OFF (Standby ON/OFF).

Also, the common CO (control output, 0 to +12 VDC) from the ZPR68-10 is used to drive the REMOTE MASTER ON/OFF CONTROL terminals of the PA635.

© 2001 Xantech Corporation.