MAKING MODERN LIVING POSSIBLE
Electrical Installation
H1 Pump
Filter Bypass Sensor
powersolutions.danfoss.com
Electrical Installation H1 Pump Filter Bypass Sensor
Revision history Table of revisions
Date Changed Rev
September 2015 Minor layout revision BC
February 2015 Minor layout correction BB
August 2014 Converted to Danfoss layout BA
July 2006 First edition AA
2 11013764 • Rev BC • September 2015
Electrical Installation H1 Pump Filter Bypass Sensor
Contents
Literature references
Literature references....................................................................................................................................................................... 4
Latest version of technical literature.........................................................................................................................................4
Product overview
Product image................................................................................................................................................................................... 5
Nomenclature....................................................................................................................................................................................5
Description/theory of operation.................................................................................................................................................5
Electrical specifications.................................................................................................................................................................. 6
Electrical installation
Pinout....................................................................................................................................................................................................7
Pin compatibility...............................................................................................................................................................................7
Mating connector.............................................................................................................................................................................7
11013764 • Rev BC • September 2015 3
Electrical Installation H1 Pump Filter Bypass Sensor
Literature references
Literature references
References
Literature ID number Title Description
520L0823
70004849
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
H1 Axial Piston Pumps Technical Information
H1 Filter Bypass Function Block User’s Guide
Complete product electrical and
mechanical specifications
Compliant function blocks set-up
information
4 11013764 • Rev BC • September 2015
A B D F E G H J K M N S T V W X Y
H1 P
Electrical Installation
Product overview
Product image
H1 Pump Filter Bypass Sensor
H1 Filter Bypass Sensor
Nomenclature
H1 Filter Bypass Sensor model code
Only certain filtration options for the H1 pump utilize the Filter Bypass Sensor. Please refer to the pump’s
nomenclature to determine if the pump is equipped with the proper option. The nomenclature can be
found on the pump’s nametag. For nomenclature details, refer to H1 Axial Piston Pumps Technical
Information, 520L0823.
T module - Filtration options using the filter bypass sensor
Option Description
M Integral full flow with filter bypass sensor
Description/theory of operation
The H1 integral pressure filter head is designed with a filter bypass valve and non-contacting bypass
sensor. The pressure differential acting on the filter element also acts on a spring biased bypass spool.
This spool is designed with a magnetic area. When a certain spool position is reached, the magnet closes
a switch in the bypass sensor which allows R2 to be in parallel with R1. This occurs without any
mechanical contact between the spool and the bypass sensor.
The position of the bypass spool is indicated by the change in the measured sensor resistance. The
change in resistance occurs when R2 is switched in and out of the circuit. When the filter is not being
bypassed, the nominal measured resistance is 510 ohms. When the switch is closed, the nominal
measured resistance is 122 ohms.
The bypass spool is designed so the bypass sensor switch will be closed before oil bypasses the filter
element. This gives the machine operator an indication that the filter is very close to bypassing and a
filter replacement is required.
11013764 • Rev BC • September 2015 5
Bypass spool
Filter bypass sensor
Filter element
21M6
R1
R2
outin
Electrical Installation H1 Pump Filter Bypass Sensor
Product overview
For cold start conditions, it is typical that the filter may bypass for a short amount of time while the oil is
warming up. At normal operating oil temperatures, a system that does not yet need a filter replacement
will operate in the non-bypass mode. The addition of an oil temperature sensor and additional control
logic, is recommended to properly determine if a filter replacement is required.
Integral filter head with filter bypass sensor
Filter head with filter bypass sensor
Electrical specifications
Electrical
Maximum voltage (V)
Maximum power (W)
Nominal resistance across pin 1 and 2 of open switch
Nominal resistance across pin 1 and 2 of closed switch
Temperature range
6 11013764 • Rev BC • September 2015
48 Vdc
0.6 W
510 Ω
122 Ω
-20° C to 100° C [-4° F to 212° F]
1 2
Electrical Installation H1 Pump Filter Bypass Sensor
Electrical installation
Pinout
Pin location
Pinout
Pin Description
1 Voltage
2 Ground
Alternative pinout
Pin Description
1 Ground
2 Voltage
Pin compatibility
Mating connector
For device electrical schematic, see Description/theory of operation on page 5.
PLUS+1® module pin type/ H1 Filter Bypass Sensor pin compatibility
PLUS+1® Module Pin Type Acceptable use: Device pin number
AIN/Temp/Rheo 1, 2
Power ground - 1, 2
Deutsch® version H1 Filter Bypass Sensor mating connector parts list
Description Quantity Ordering Number
Connector 1 Deutsch® DTM06-2S
Secondary wedge lock 1 Deutsch® WM-2S
Socket terminal 2 Deutsch® 0462-201-20141
11013764 • Rev BC • September 2015 7
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