C2485M-A-ML (2/05) 7
E
ng
li
s
h
NOTE:
These are the recommended maximum distances for 24 VAC
applications and are calculated with a 10 percent voltage drop. (Ten
percent is generally the maximum allowable voltage drop for
AC-powered devices.)
NOTE:
Input power for the dome is 24 VAC only. Power
consumption is 75 VA per dome.
Use a 24 VAC transformer with a minimum of 100 VA.
Table A.
Fiber Optic Cable Types
Spectra Model Cable Type Connector
Single mode (PRS models) 9/125 µm cable ST type
Multimode (PRM models) 62.5/125 µm cable ST type
Table B.
24 VAC Wiring Distances
Wire Gauge
Total VA 20
(0.5 mm
2
)
18
(1.0 mm
2
)
16
(1.5 mm
2
)
16
(2.5 mm
2
)
75 37 ft
(11 m)
60 ft
(18 m)
95 ft
(29 m)
153 ft
(46 m)
Table C.
Configuration of Wire Harness
Pin Wire Color Function
9-Conductor Cable
A Black Alarm 1
B Red Alarm 2
C White Alarm 3
D Green Alarm 4
E Brown Alarm 5
F orange Alarm 6
GYellow Alarm 7
HViolet Ground
– Blue Not Used
5-Conductor Cable
J Black Relay N.O. (Aux. 1)
K Red Relay N.C. (Aux. 1)
L Green Relay Common (Aux. 1)
M Brown Ground
N White Auxilary 2
Power Wires
a White 24 VAC (AC HI)
b Black 24 VAC (AC LO)
c Green/Yellow Earth Ground