GAI-Tronics 10461-002 Centra-Page Card Rack - Manual (Page 3)

Pub. 42004-220B
Model 10461-002 Centra-Page Card Rack Page: 3 of 7
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-220b.doc
08/05
Installation
Power Requirements
This equipment is designed for nominal 24 V dc operation (22 to 28.8 V) with the negative side
grounded, 20 amps maximum, 2 amps idle. However, neither power supply lead is actually wired to the
ground terminal.
The Centra-Page system may be used with negative ground, positive ground, or ungrounded power
sources. The card rack must be mounted in a non-hazardous area.
If installing a station and line card as an add-on, please consult the following chart to ensure proper power
will be supplied.
Power Supply Current Requirements
Mode 10 Cards 20 Cards 30 Cards
Standby 0.8 amp 1.5 amps 2.3 amps
Page (maximum load) 5.7 amps 11.4 amps 17.1 amps
Alarm (typical) 3.8 amps 7.5 amps 11.3 amps
Alarm (maximum level) 12.5 amps 25.0 amps 37.5 amps
Notes regarding power supply current requirements listed above:
1. Ratings at 27.0 V dc at the central cabinet. Add 8% for page and alarm at 28.8 V dc.
2. Full load is defined as 15-watt load on all cards with levels adjusted at factory; 2-watt alarm output.
3. Typical load is defined as 7.5-watt load (such as 16-ohm loudspeaker connected to 8-ohm output).
4. Maximum level is defined as 15-watt loads and level control adjusted for 15-watt alarm level on all
cards.
5. Ratings for alarm based on continuous tones. Pulse tone reduces current to about 60%.