Electrical Installation
Series 45 Pumps
Fan Drive Control (FDC)
powersolutions.danfoss.com
Electrical Installation
S45 FDC
Revision history Table of revisions
Date Changed Rev
July 2016 First edition 0101
2 | © Danfoss | July 2016 BC00000371en-US0101
Electrical Installation
S45 FDC
Contents
Literature references
Product overview
Electrical installation
Literature references....................................................................................................................................................................... 4
Latest version of technical literature.........................................................................................................................................4
Product image................................................................................................................................................................................... 5
Order code.......................................................................................................................................................................................... 5
Fan Drive Control configuration................................................................................................................................................. 5
NC Fan Drive Control 3D Views................................................................................................................................................... 6
Fan Drive Control Principle ..........................................................................................................................................................6
Fan Drive Control System Characteristics................................................................................................................................7
Unintended Applications for Fan Drive Control Systems..................................................................................................7
Fan Drive Control characteristic - Normally Closed ............................................................................................................ 7
Solenoid data – Normally closed................................................................................................................................................ 8
Connectors..........................................................................................................................................................................................9
Pinout....................................................................................................................................................................................................9
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Electrical Installation
S45 FDC
Literature references
Literature references
Literature title Description Literature number
S45 Axial Piston Open Circuit Pumps Technical Information Complete product electrical
S45 Pump Fan Drive Control Function Block User Manual Compliant function block
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
and mechanical
520L0519
specifications
BC00000369
set-up information
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SR P JC D E F G H
K
L M N
Electrical Installation
S45 FDC
Product overview
Product image
Order code
S45 Fan Drive Control
S45 Pump model code
Fan Drive Control configuration
The available Normally Closed Fan Drive Controls for Series 45 are shown below. The allowable Pressure
Compensator (PC) pressure settings are provided for each frame.
C module—Control
G module options—Choke Orifice
Fan Drive Control Options Frame
Code Description L K J F E
SA Pressure Compensation (12Vdc), 100-210 Bar, Left • •
SB Pressure Compensation (24Vdc), 100-210 Bar, Left • •
SC Pressure Compensation (12Vdc), 220-310 Bar, Left • •
SD Pressure Compensation (24Vdc), 220-310 Bar, Left • •
SE Pressure Compensation (12Vdc), 100-210 Bar, Right • •
SF Pressure Compensation (24Vdc), 100-210 Bar, Right • •
SG Pressure Compensation (12Vdc), 220-310 Bar, Right • •
SH Pressure Compensation (24Vdc), 220-310 Bar, Right • •
Fan Drive Control options Choke Orifice size
G 0.8 mm (0.031 in)
F 1.0 mm (0.039 in
H module options—Gain Orifice
Fan Drive Control options Gain Orifice Size
E 1.2 mm (0.047 in)
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W
Electrical Installation
S45 FDC
Product overview
NC Fan Drive Control 3D Views
Fan Drive Control Principle
Left Right
The Fan Drive Control is a unique electrically actuated pressure control solution that consists of a
normally closed proportional solenoid and one dual diameter spool sliding in the control housing.
System pressure acts on an area between the two spool diameters of the spool lands. This hydraulic force
is balanced with forces of springs and the solenoid when the spool is in the metering position. When no
current is sent to the solenoid it operates the pump at or below the PC setting which is adjusted
mechanically with the adjustor screw and lock nut. Increasing the control current proportionally reduces
the pump's outlet pressure until a minimum standby pressure is reached.
Control Block 12V and 24V
The minimum system pressure is given by swashplate moments of the pump and by servo system
leakages which produce a pressure drop across the control. In addition, fan motor type and fan inertia
impact minimum system pressure.
The Normally Closed Fan Drive Control coupled with a microprocessor allows the pump to operate at an
infinite range of operating pressures between a minimum system pressure and PC setting.
We recommend that a relief valve be installed in the pump outlet for additional system protection.
Warning
The Fan Drive Control is intended for fan drive systems only! Use in other systems could result in system
component damage or unintended machine movement. The Fan Drive Control is not intended to serve
at the primary system pressure relief. Loss of the input signal to this control will cause the pump to
produce maximum flow.
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M2
L2
S
L1
P109019
B
Legend
B
S
L1, L2
M2
= Outlet
= Inlet
= Case drain
= System pressure
gauge port
Gain
Orifice
Choke
Orifice
Electrical Installation
S45 FDC
Product overview
Fan Drive Control System Characteristics
•
Constant pressure and variable flow
•
High or low system pressure mode based on fan cooling demand
•
System flow adjusts to meet system requirements
Unintended Applications for Fan Drive Control Systems
•
Applications with frequent PC events (system pressure overshoots)
•
Adjustable Load Sensing systems
Fan Drive Control Cross Section
Fan Drive Control characteristic - Normally Closed
When an electric current is sent to the Normally Fan Drive Control, pump outlet pressure decreases
proportionally to the increase in currentt. When the load in the system changes, the pump will adjust its
displacement to maintain the pressure demanded by the controlling current. This predictable control is
especially useful for fan-drive systems, due to the direct relationship between fan-speed and pump
pressure. Due to the nature of the Fan Drive Control, the relationship between current and pump
pressure is unique for each individual PC pressure setting combination. The relationship between pump
outlet pressure and control input current (for a 24V coil) is shown for various PC settings below. The
hydraulic schematic for the Normally Closed Fan Drive Control is shown below as well.
Attaining remarkably low system pressures is possible with the Fan Drive Control. The minimum system
pressure is greatly dependent on individual system parameters such as fan motor type and fan size. This
feature is highly desirable in low cooling demand conditions to keep fan speed as slow as possible.
Virtually eliminated control deadband increases controllability and reduces power loss. Control current
resolution is greatly improved.
S45 pump with integrated FDC control Schematic
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Electrical Installation
S45 FDC
Product overview
Solenoid data – Normally closed
Solenoid Data – Normally Closed
Connector on solenoid Deutsch DT04-2P
Mating Connector (not included) Deutsch DT06-2S
Identification by color of nut Black Blue
Nominal current 1650 mA 840 mA
Maximum Control Current 1800 mA 920 mA
Environmental rating IP67 without mating connector,
Maximum output driver current 2.0 Amps
PLUS+1 dither frequency Not recommended
Useable PWM Frequency Range 50-200 Hz
Recommended PWM Frequency 200 Hz
Nominal Resistance at 20°C 3.66 Ω 14.2 Ω
Inductivity (pin at stroke end) 33 mH 140 mH
Minimum voltage 9.5 Vdc 19.0 Vdc
Maximum power 17.9 Watts 18.1 Watts
12V 24V
IP69K with mating connector
The Fan Drive Control is designed as a current driven control. It requires a PWM- input signal.
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P003480
Electrical Installation
S45 FDC
Electrical installation
Connectors
Pinout
Description Quantity Ordering Number
Mating Connector 1 Deutsch® DT06-2S
Wedge Lock 1 Deutsch® W25
Socket Contact (16 and 18 AWG) 2 Deutsch® 0462-201-16141
Danfoss mating connector kit 1 K29657
Pin location
Pin Function
1 Power ground- or PWMOUT
2 PWMOUT or Power ground-
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Electrical Installation
S45 FDC
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Electrical Installation
S45 FDC
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