14 THE BLUE BOX LT OVERVIEW
LCDBBO03Sept08
3#18 AWG. Supplies power from transformer 1.
to relay control card.
14 conductor ribbon cable: carries control signal 2.
between DTC and relay control card (master
panel only).
2 conductor ribbon cable: carries control signal 3.
from smacker strip to relays - one per relay.
10 conductor ribbon cable: carries digital signal 4.
from relay control card to smacker strip.
5 conductor ribbon cable: carries digital signal 5.
from relay control card to (optional) digital input
card.
4#22 AWG carries RS-232 signal from (optional) 6.
modem to relay control card (master panel only).
Terminator/terminator pins to terminate bus line.7.
External Connections
4#24 flat cable from modem to analog phone 8.
jack. Always note phone number of modem.
2#18 AWG to Blue Box photocell. Up to 300 feet.9.
Cat. 5 cable with RJ45 connectors links Blue Box 10.
to other digital devices (other blue box panels or
digital switches).
Contact closure inputs & DI card common 11.
“GND” + 1 #18 per input.
Line and load relay lugs.12.
For information about cabling for contact closure
switches or occupant sensors. Refer to DI Card
Installation Guide for options and details.
GR1416 LT (DOOR OPEN) INTERNAL SCHEMATIC
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