2
131 EISENHOWER LANE NORTH
LOMBARD, ILLINOIS 60148
630-268-0010 / 1-800-251-2408
Intellitec
P/N 53-22117B100 Rev 021700
200 AMP BATTERY DISCONNECT
THE RELAY
THE RELAY
THE RELAY
THE RELAY
THE RELAY - How It Works
The Battery Disconnect Relay is a mechanically latching switch. It operates by the
momentary application of battery voltage to the coil terminals in one direction for latching
(closed), or the other direction for unlatching (open).
To close the relay, +12 volts is applied to the “I” terminal and ground to the “S” terminal
of the relay. When this is done, the plunger is magnetically pulled into the solenoid coil
and the contact washer connects to the contact studs, making electrical connection. While
this happens, the rod magnet, suspended below the plunger in a plastic holder, is attracted
(opposite poles attract) to the plunger, by the magnetic field. It swings into position at
the end of the plunger (
See FIGURE 1). When the voltage is removed from the coil, the
plunger gets pushed back by the return spring, but is blocked by the magnet holder. The
contacts remain CLOSED.
To open the relay, +12 volts is applied to the “S” terminal and ground on the “I” terminal.
When this is done, the plunger is again pulled into the coil. However, since the magnetic
polarity of the coil is reversed, the rod magnet is repelled (like poles oppose), and swings
out of the way (
See FIGURE 2). When the voltage is removed from the coil, the plunger
gets pushed out by the return spring, breaking the connection between the two large
terminals.
C O A C H BAT T
S W IT C H
COACH PANEL
SING LE B ATT ERY D ISC ON NE CT
M OD E LS BD 0 & B D 1
+ 1 2V
G N D
L E D
2 .2 K
N O T E: M O V E S W ITC H
D O W N F O R U S E
U P F O R S TO R E
F U S E
7 .5 A M P
IN TE R -CO N N EC T CA B L E
F U S E
7 .5 A M P
TO S YS T E M
N O TE : I T E RM IN A L + FO R U SE
S TE RM IN AL + F OR S TO RE
C O A C H
D ISC O N N E C T
C O A C H
B AT T
B L A N K
B R O W N
R E D
W H IT E
G R E E N
B L AC K
1
2
3
4
5
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