Phonetics SCADA 3000 manual Power Supply And Grounding, Labeling, Scada

Annunciator Module

the panel. Re-install the locking side panels and tighten the Allen screws to secure the enclosure to the panel. See Figure 2 below.

Panel
locking	Allen
side		Rear of
	screw
panel		Module

Figure 2: Rear view of mounted annunciator module

Labeling

The Annunciator Module comes with a blank label on the front on which you can write a de- scription to identify each light—such as the corresponding alarm or output. We include addi- tional blank labels for your convenience.

POWER SUPPLY AND GROUNDING

The Annunciator Module operates on 10-15VDC. Typically the module is powered from the AUX PWR terminals on the SCADA 3000 main unit. This is preferred because the AUX PWR from the main unit is battery-backed in the event of a power failure, when a battery is connected to the main unit. Alternately, you may connect the module to any 10-15VDC power source. The module requires 1.5 Watts of power. See Figure 3.

Annunciator Module

+AUX	EG	A B Y Z
12VIN
		4

Connect to Electrical

Earth Ground

RS232-DCE	SPARE	15V	AUX	EG	BAT	24V
		+IN-	+PWR-		+ -
COM 1

FUSE

SCADA 3000

RS232-DTE

COM 2

Figure 3: Annunciator Module connected to the SCADA 3000

It is extremely important that the EG pin be connected to a good earth ground. This will prevent communication errors due to differences in ground potential between modules in addition to possible damage due to voltage transients and surges.

AM-7