SA-365-10 Installation Instructions Page 5 of 8
CP5036A 05/24/10
MOUNTING
The mounting bracket supplied can be installed above or below the unit. Choose a mounting
location convenient to the operator and away from any air bag deployment areas. Inspect behind
mounting area for clearance. Assure adequate ventilation to prevent overheating. Consider wire
routing and access to connections, as well as microphone bracket placement. Install mounting
bracket to vehicle using 1/4" hardware (not supplied). If mounting in a rack or console, make sure
that mounting bolts do not enter case more than 1/4".
ELECTRICAL CONNECTIONS
Electrical connections to the unit are made using a removable terminal block plug located on the
back. A label on the unit identifies each terminal function. Install the plug on the unit before
wiring. If the unit needs service the plug can be easily removed without unwiring. The power
supply of the unit must be capable of delivering peak currents up to 50 amps for adequate short
circuit protection and reliable operation. The preferred source is directly at the vehicle battery.
The unit is fused near connector.
Attach leads by stripping 3/8", inserting into plug and clamp by tightening screw. Make sure the
screw is tight and the wire can't be pulled out.
Failure to adequately tighten the screw can result in improper operation or burning the
connector and wire.
Wire Size and Termination - The diagram shows the minimum wire size used for each connec-
tion, along with recommended lead color. If the wire is longer than 10 ft. use the next larger wire
size. Use only high quality crimp connectors for installation on the vehicle.
Auxiliary Input Connection (AUX) (Optional) - A momentary input typically connected to the
horn ring of the vehicle or other switch. The auxiliary input may be activated with positive or
negative voltage. Input current is less than 10 mA.
See OPTION SWITCHES section for polarity selection.
NOTE: Permanent disconnection of the vehicle horn is NOT recommended.
Auxiliary Input
Connection Examples
Activated with
+VDC OR -VDC
Factory Default
DIP SW-1 OFF for +VDC
DIP SW-1 ON for -VDC
HORN RLY +VDC
or
-VDC
Added
SPDT
S
wit
c
h
To
AUX
Vehicle
Horn
+VDC
or
-VDC
Momentary
SPST
S
wit
c
h
To
AUX
Horn
Circuit
Note:
Vehicle horn will also
sound with siren
To
AUX
Vehicle
Horn
S
p
lice
6-P Terminal Block Plug (CP4688-06) 15A Automotive Type Fuse Plug into unit first for terminal identification Plug installed this orientation#18G BRN#18G BRN#16G RED#16G BLK
POS
AU
X
SP
K
SP
K
NEG
LMP
BAT
+
-
AUX 11 ohm 100W #22G WHTNote: LMP connection not used on SA-365