Power Supply

2 Power Supply w/Line Conditioner The power supply is the heart of the Millenium System. It can support between 15 DCD boards (power for locks and other devices provided by local power supplies. In addition to providing board power, the power supply has an integrated line conditioner which generates the biasing voltage necessary for RS-485 communications and to filter out any noise or interference on the communications cabling.

3 Power Supply Spec’s Input: –120 VAC, 60 Hz, 2 AMPs unswitched circuit (P/N PS ) –240 VAC, 50 HZ, 2 AMPs unswitched circuit (P/N PS ) Output: – AMPs. Backup Battery: –6 VDC Lead 8 AH. (Two Batteries Required). Fuses: –AC input fuse: 2 AMP, Slow Blow, Full Size Automotive Type. –Battery fuse: 8 AMP, Slow Blow, Full Size Automotive Type. Alarm Outputs: –Form A for AC Power Fail. –Form A for Enclosure Cover Tamper.

4 Power Supply J3 Terminal Block

5 Power Supply J4 Terminal Block

6 Power Supply F3 Fuse

7 Power Supply F4 Fuse

8 Power Supply Line Conditioner Board

9 AC Connections

10 DC Output Connections

11 AC Fail Supervision Relay

12 Enclosure Tamper Switch

13 Communications Power Connections

14 Signal Ground Connection

15 Single Power Supply Application

16 Connecting Multiple Power Supplies

17 Multi Floor Power Supplies

18 Power Supply Tech Tips AC must be wired by Qualified Electrician. Earth Ground to Terminal 12. –Use Solid Core cable, AWG #10 or better. –Less than 50 ft to ground source is ideal. –Use 6” radius bends on the cable. No sharp 90º corners. –Use mechanical ground clamp to attach wire to ground source. –Use CWP, UFER ground, or some other verified and approved ground source. No Gas or Fire Sprinkler Pipe. Create a monolithic shield for the signal ground. –Ground shielded cable on one end only. Tie down the shield to terminal 12. –The -TXR and +TXR terminals are not used on additional power supplies within the same SCU branch. Only the shield and a common negative is connected between power supplies to establish the bonded signal ground.

19 Power Supply Tech Tips The Power Supply can only be loaded to a maximum of 80% of its current rating. –Maximum rating is 5 AMPs or 5000 mA. Eighty percent loaded is 4 AMPs or 4000 mA. Replace fuses with like rated fuses. Replace lead acid batteries every 3-5 years. The Unican part number for the power supply is: 120 VAC, 60 Hz PS VAC, 50 Hz PS Power Supply part number includes batteries and a locking enclosure.

20 Power Supply Terminal Summary Label