Magnetek DSD 412 - Figure 1: DSD 412 Block Diagram a

INTRODUCTION
16
Figure 1: DSD 412 Block Diagram A
ISOLATION
TRANSFORMER
50/60 Hz
UTILITY
POWER
CUSTOMER
DISCONNECT
F1
F2
F3
SNUBBER PCB
AND
COMPONENTS
L1
L2
L3
LPR
LOOP
PICK-UP
RELAY
K1
CONTACTOR
PILOT
RELAY
MOTOR &
TRANSFORMER
THERMOSTATS
E-STOP
SENSE
K1
SAFETY
CHAIN
LPR
ME
LOOP
CONTACTOR
CONTROL
POWER
XFMR
POWER
SUPPLY
PCB
HEAT SINK
COOLING FAN
CONTACTOR
CONTROL
SIGNAL
SENSING
LOW VOLTAGE
POWER
115 VAC
MOTOR FIELD
CONTROL
HOI ST
MOTOR
FIELD
+
FIELD CURR.
SIGNAL
FIELD CONTROL
SCR GATING