SentexSystems CROWN JEWEL Installation Instructions Manual page 10

Magnetic locks and DC powered strikes generate voltage spikes that may damage the Crown Jewel
unit. Sentex strongly recommends installing a IN4001 diode or a Metal Oxide Varistor across
the magnetic lock coil. If the IN4001 diode is used, connect the cathode (the banded end) to the
positive side of the coil and the anode to the negative side of the coil.
3. TELEPHONE LINE: connect two pairs of 18 to 24 AWG twisted pair telephone wires to TB3 on
the main processor board, one wire to each pin. If you are using shielded wire for this
connection, connect the shield for each of the cables to the chassis ground on the main
processor board.
High voltages are present in the power supply area of the main processor board when power is
connected to the Crown Jewel unit. Proceed with caution once power has been connected.
4. POWER: Connect the power cable to TB2 on the main processor board and to the transformer
provided with the unit. The unit can also be powered by a 12 VDC power source, which also is
connected to TB2. Polarity is unimportant for both AC and DC power.
NOTE: The crown jewel will not charge a battery, so a UPS-type power supply must be used if a
battery back-up is desired.
B. OPTIONAL CCTV BOARD
1. Connect a two conductor 10 to 18 AWG cable (Belden Datalene #9501 or equivalent) to TB 1 on
the lower right corner of the CCTV Power Supply Board. See Table 2.
2. Connect coaxial cable with BNC connectors (Belden #9240 or equivalent) to J2, on the middle
bottom of the CCTV Power Supply Board.
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WARNING!
CAUTION
Figure 5. Optional CCTV Unit.
Doc. 6001145 Rev B