CIA-675-001 Rev 1.1
10 |
P a g e
Direct: (602) 773-1700
Main: (800) 481-7459
2101 W Peoria Ave, Suite 100
Phoenix, AZ 85029
www.opentechalliance.com
Inputs
: Each Input has a Ground Connection (G) and a Sense Connection (1). The sense connections are
marked 1-8 and will source a small voltage at high impedance. Wire any dry contact across a sense pin and
a G pin. Closing the contact will energize the input. On board LEDs are provided to show if the input is
activated.
Earth Ground:
To connect an earth ground wire, run an insulated copper wire (preferably color green)
from a grounded water pipe or from a copper rod in the ground to the gateway and connect it to the
green earth ground wire using a wire nut. The enclosures earth wire is connected to the stud in the floor of
the enclosure and the door using a screw with a star washer. The PCB’s lower left mounting standoff
provides continuity of earth ground to the cabinet. This installation must meet applicable code as the type
of wire, depth of burial, and size of the rod may vary by municipality.
Note
: Uninsulated wires (typically
used for earth ground) cannot be located inside the unit’s case. Make connections for an uninsulated
ground wire outside the enclosure.
Battery Backup Calculations
: The Gateway PCB has a built-in battery charger to keep the battery full
charged. The standard 12V Battery (
P/N: DURA12-8F or Equivalent
) is rated at 8AH which is sufficient to keep a 6
keypad system running for approximately 3 hours if power is interrupted. The following formula is used to
estimate battery life. Current draw is defined below for 12V input (battery).
•
Gateway Draws 300ma + 41 ma per wired relay + 500ma for the any accessory power
•
Keypads Draw 200ma + 41ma / wired relay + 100ma if RF transmitter is ins any accessory
power
•
Relay unit Draws 200 ma + 41 ma / wired relay + 100ma if RF transmitter is installed
•
Example Calculation for 6 keypads w/2 relays used, 1 relay unit w/4 relays used and a Router
8000mah / ((300 + (282 x 6) + (364 x 1) + 500) = 2.8 Hrs
