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Tolomatic User Guide:
ICR Rod Style Integrated Control Actuator
4.1.4 Shunt Regulators
Shunt regulators work with the ICR Plus and Basic actuators to prevent over voltage
conditions. The shunt regulator has screw terminals marked with “+” and “-”, which
should be connected to the regulated bus.
Shunt Regulator Specifications (2180-1163)
Voltage Range
24 - 80 VDC
Shunt Resistance
50 Ohms
Continuous Power Dissipation
1
50 Watts
Peak Power Dissipation
2
800 Watts
1
Continuous power dissipation will vary based on installation and ambient conditions.
2
Power at nominal trip voltage.
If additional power dissipation is needed, additional regulators may be paralleled.
Figure 4-5: Shunt Regulator Input Wiring Diagram
4.1.5 diodes
A diode with a minimum blocking voltage of 50V is suggested, with a forward
current rating of 1.5X peak current rating of the application.
Figure 4-6: Diode Wiring Diagram
WARNING!
Do not reverse polarity of
the power input.
CAUTION!
The resistor and the heat
plate can become hot
during operation.
CAUTION!
Do not apply continuous
voltage over the trip
voltage to the regulator as
this will cause excessive
heating.
POWER GROUND
+24-48VDC POWER
SHUNT
REGULATOR
+
-
TO SHUNT REGULATOR AND ACTUATOR (+)
TO SHUNT REGULATOR AND ACTUATOR (-)
HIGH POWER
POWER SUPPLY
24 to 48VDC
+
-
ANODE
CATHODE
4 :
P O W E R S U P P Ly R E C O M M E N D A T I O N S
