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CONTROL
WIRING
FUSE
POLARITY
PROTECTION
DIODE
POWER
(250Ω, 5W)
WIRING
FUSE
B+
B-
PRECHARGE RESISTOR, such as Curtis PMC p/n MP-2
COIL SUPPRESSION DIODE, such as Curtis PMC p/n MP-1
(
Pedal microswitch not used with SRO controllers.)
*
(
See Figure 10 for emergency reverse.)
**
Typical installation, Curtis PMC 1204X/1205X/1209/1221 controllers.
Fig. 7
Curtis PMC 1204X/1205X/1209/1221 Manual
OTHER HARDWARE
The recommended hardware for a typical 1204X/1205X/1209/1221 controller
installation is shown in Figure 7.
Contactors should be mounted in a clean, dry location. If such a location is
unavailable, a cover should be used to deflect dirt and water splash.
The precharge resistor connected to the main contactor, and the coil
suppression diodes connected to the main contactor and to the forward/reverse
contactors, are somewhat delicate components. Care should be taken to prevent
damage to them during installation.
KEYSWITCH
COM.
*
MAIN
CONTACTOR
(Albright
SW180
shown)
B-
B+
M-
A2
BYPASS CONTACTOR
POTBOX
N.C.
KSI
F/R cont. output
Bypass cont. output
Emergency reverse **
FWD input
REV input
HARDWARE INSTALLATION
FORWARD/REVERSE SWITCH
(SPDT, center off)
F
R
FORWARD/REVERSE
CHANGEOVER CONTACTOR
(Albright DC182 shown)
FWD
REV
A1
A2
S1
S2
SERIES
MOTOR
8
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