Danfoss EH User guide

MAKING MODERN LIVING POSSIBLE

Technical Information

Electronic Control Modules

EH Modules

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Technical Information	EH Modules

Revision history	Table of revisions
	Date	Changed	Rev
	January 2016	Converted to Danfoss layout	0103
	September 2010	New Back cover	AC
	May 2010	Japan location	AB
	October 2004	First edition	A

2	520L0804 • Rev 0103 • January 2016

Technical Information	EH Modules
Contents
Electronic control modules - EH modules
	General.................................................................................................................................................................................................	5
Mounting base and accessories - EHB
	General.................................................................................................................................................................................................	6
	Dimensions, code numbers, and weight.................................................................................................................................	7
Electronic flow regulation - EHF
	General ................................................................................................................................................................................................	8
	Function...............................................................................................................................................................................................	8
	Signal monitoring.............................................................................................................................................................................	9
	Characteristic.....................................................................................................................................................................................	9
	Electrical system ............................................................................................................................................................................	10
	Technical data.................................................................................................................................................................................	10
	Code number and weight...........................................................................................................................................................	11
Electronic alarm logic - EHA
	General ..............................................................................................................................................................................................	12
	Function............................................................................................................................................................................................	13
	Electrical system.............................................................................................................................................................................	14
	Monitoring more than eight functions..................................................................................................................................	15
	Electric remote to mechanical operation..............................................................................................................................	16
	Technical data.................................................................................................................................................................................	17
	Code number and weight...........................................................................................................................................................	17
Electronic ramp generator - EHR
	General ..............................................................................................................................................................................................	18
	Function............................................................................................................................................................................................	18
	Signal monitoring..........................................................................................................................................................................	19
	Electrical system - Principle 1.....................................................................................................................................................	20
	Electrical system - Principle 2.....................................................................................................................................................	21
	Ramp times.......................................................................................................................................................................................	22
	External break contacts................................................................................................................................................................	23
	KA, KB signals...................................................................................................................................................................................	23
	Technical data.................................................................................................................................................................................	24
	Code number and weight...........................................................................................................................................................	24
Electronic speed control - EHS
	General ..............................................................................................................................................................................................	25
	Function............................................................................................................................................................................................	25
	Potentiometer 1..............................................................................................................................................................................	26
	Potentiometer 2..............................................................................................................................................................................	26
	Potentiometer (P)...........................................................................................................................................................................	27
	Recommendation..........................................................................................................................................................................	27
	Input reference...............................................................................................................................................................................	27
	Electrical connection....................................................................................................................................................................	29
	Technical data.................................................................................................................................................................................	29
	Code number and weight...........................................................................................................................................................	30
Electronic, frequency controlled loop speed control - EHSC
	General ..............................................................................................................................................................................................	31
	Adjustment possibilities..............................................................................................................................................................	31
	Function monitoring.....................................................................................................................................................................	32
	Adjustments.....................................................................................................................................................................................	32
	Potentiometer 1 .......................................................................................................................................................................	32
	Potentiometer 2 .......................................................................................................................................................................	33
	Potentiometer 3 .......................................................................................................................................................................	34
	Potentiometer 4 .......................................................................................................................................................................	35
	Potentiometer (P)...........................................................................................................................................................................	35
	Resistance (R)...................................................................................................................................................................................	36
	Electrical system.............................................................................................................................................................................	37
	Technical data.................................................................................................................................................................................	37

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Technical Information	EH Modules

Contents
Required control and feedback frequency signal..............................................................................................................	38
Main spools and electrical actuation modules....................................................................................................................	38
Code number and weight...........................................................................................................................................................	38
Electronic, voltage controlled closed loop speed control - EHSC
General ..............................................................................................................................................................................................	39
Adjustment possibilities..............................................................................................................................................................	39
Function monitoring.....................................................................................................................................................................	40
Adjustments.....................................................................................................................................................................................	41
Potentiometer 1 and 2............................................................................................................................................................	41
Potentiometer 3 .......................................................................................................................................................................	41
Potentiometer 4 .......................................................................................................................................................................	42
Potentiometer (P)...........................................................................................................................................................................	43
Resistance (R)...................................................................................................................................................................................	43
Electrical system.............................................................................................................................................................................	45
Technical data.................................................................................................................................................................................	45
Required feedback frequency signal......................................................................................................................................	46
Main spools and electrical actuation modules....................................................................................................................	46
Code number and weight...........................................................................................................................................................	47
Electronic closed loop position control - EHC
General ..............................................................................................................................................................................................	48
Adjustment possibilities..............................................................................................................................................................	48
Inverse function..............................................................................................................................................................................	49
Interruption of the signal output.............................................................................................................................................	49
ON/OFF signal t1/t6......................................................................................................................................................................	50
Redundant position transducer................................................................................................................................................	50
Function monitoring.....................................................................................................................................................................	51
Adjustment.......................................................................................................................................................................................	52
Potentiometer 1 .......................................................................................................................................................................	52
Potentiometer 2........................................................................................................................................................................	52
Potentiometer 3........................................................................................................................................................................	52
Potentiometer 4........................................................................................................................................................................	52
Electrical system.............................................................................................................................................................................	53
Resistance values...........................................................................................................................................................................	53
Technical data.................................................................................................................................................................................	54
Code numbers and weight.........................................................................................................................................................	54
EH modules dimensions
Dimensions.......................................................................................................................................................................................	55

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Technical Information	EH Modules

Electronic control modules - EH modules

General

Electronic control modules - EH modules

Danfoss electronic control modules are a series of module boxes used for signal matching, for the control of the electric activating modules of a proportional valve, and for function monitoring inhydraulic systems. EH modules are built into a plastic box with an 11-pole plug and are designed in compliance with IEC publication 67, second edition part 1, drawing 67-1-18a.

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Technical Information	EH Modules

Mounting base and accessories - EHB

General

Mounting base, 11-pole, for EH modules - EHB

EHB can be mounted using two screws. It can also be clipped onto DIN rails (DIN 46277).

EHB is designed to be wired and contains self-lifting terminals and cross/slotted screws.

On all electrical diagrams with EH modules the terminal connections are located in relation to EHB. If another mounting base is used, the terminal connections can be re-allocated, but the terminal numbers will remain the same.

Retaining clip on EH module

Retaining clip in spring steel for additionally securing EH modules on EHB where strong vibrations occur. The code number covers 10 off retaining clips.

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Technical Information	EH Modules

Mounting base and accessories - EHB

Dimensions, code numbers, and weight

EHB dimensions in millimeters [inches]

EHB mounting base code number	EHB base weight
155U0933	0.065 kg (0.143 lb)

EH module retaining clip

EH module retaining clip code number	Quantity
155U0932	10

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Technical Information	EH Modules

Electronic flow regulation - EHF

General

Electronic flow regulation - EHF

Danfoss electronic flow regulation EHF is for use where the requirement is individual reduction of the flow from the two ports of the proportional valve.

The flow can be reduced individually for ports A and B, infinitely down to 25% of maximum flow. An EHF built into an electrohydraulic system gives very precise control of the working functions. EHF is supplied for the regulation of two working functions.

Function

Flow adjustment - EHF

EHF must be inserted in the signal connection between the electric remote control lever and PVG proportional valve.

There are two built-in potentiometers per function. Independently of each other, these will limit the signal voltage and thereby the flow from ports A and B.

The remote control unit retains its full regulation range because EHF incorporates dead-band compensation and reduced signal voltage instead of mechanical reduction of the regulation range of the remote control unit.

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Technical Information	EH Modules

Electronic flow regulation - EHF

Signal monitoring

EHF has signal monitoring on the signal inputs (terminals 3 and 4). This means that input signals must lie within the range 0.15 • UDC to 0.85 • UDC.

If the signal is outside the stated range, such as a consequence of short-circuiting to plus or minus supply, the signal monitoring cuts off the output signal to the proportional valve which then immediately sets the main spool into neutral position.

If monitoring has cut off the output signal, EHF can only begin functioning again when the supply voltage has been cut off.

Characteristic

Flow as a function of the input signal and the two potentiometers for the flow limitation at ports A and B

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Technical Information	EH Modules

Electronic flow regulation - EHF

Electrical system

EHF - electrical system

Signal leads

Supply leads

Technical data

Supply voltage	UDC	11 to 30 V
	Maximum ripple	5%
Current consumption		< 50 mA
Output voltage (US)	US	0.25 → 0.75
	UDC
Neutral voltage (US)	US	0.5
	UDC
Input signal		Remote control lever, potentiometer
Input impedance		12 kΩ at 0.5 • UDC
Output signal	Maximum load	Two parallelconnected PVEs
	Minimum load impedance to 0.5 •	6 kΩ
	UDC

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Technical Information	EH Modules
Electronic flow regulation - EHF
	Signal current maximum	UDC = 12 V	±0.5 mA
		UDC = 24 V	±1.0 mA
	Ambient temperature		-30 to +60°C [-22 to 140 °F]
	Enclosure to IEC 529		IP 42

EHF must be connected to the supply voltage at the same point as the remote control lever.

Code number and weight

EHF mounting base code number	EHF base weight
905	0.10 kg (0.22 lb)

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Technical Information	EH Modules

Electronic alarm logic - EHA

General

Electronic alarm logic - EHA

Danfoss EHA electronic alarm logic modules are used primarily where together with PVEH electric activation modules they must meet requirements for optimum system safety.

In principle, EHA can be compared with eight series-connected relays that collect alarm signals from up to eight PVEH activation modules and via the series connection combine them into a single active output signal.

The output signal is able to control electric PVPX and PVPE relief valves, normally open (NO) version which will relieve the LS signal/pump pressure to tank on fault signal from PVEH. These relief functions make the PVG valves hydraulically inactive.

Alternatively, EHA can be used to control sirens, warning lamps and other alarm sources to indicate function fault.

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Technical Information	EH Modules

Electronic alarm logic - EHA

Function

The alarm outputs from the electrically activated PVEHs in a valve group must be connected to EHA. EHA is built up so that it is able to monitor up to eight PVEH alarm outputs.

With fault-free function, the EHA output signal is internally connected to minus

Fault-free function						Fault function

If one or more of the PVEH alarms indicate a fault, the EHA output signal is cut off immediately.

To ensure correct function, all unused inputs must be connected to minus, i.e. EHA regards all inputs without connection as a fault. In addition, all input signals exceeding 8 V are also regarded as faults while signals of less than 3 V are regarded as fault-free.

In the range 3-8 V the condition remains undefined.

EHA automatically resets when the fault condition no longer exists.

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Technical Information	EH Modules

Electronic alarm logic - EHA

Electrical system

Electronic alarm logic EHA electrical system

*1
	8 9 5 7 4 3
	Alarm Logic EHA
	155U1805
	SUPPLY: 11-30V DC
	Unused inputs must
	be connected to "-".
	MADE IN DENMARK
	1011 6 21	<![if ! IE]> <![endif]>3,15,16 1,2,14 10 22
	<![if ! IE]> <![endif]>Pinno. 8 7 5
*1	<![if ! IE]> <![endif]>Function Prop1 Prop2 Prop3	<![if ! IE]> <![endif]>U N.sw.out U+	<![if ! IE]> <![endif]>-U
		<![if ! IE]> <![endif]>DC

*2	-	+	F1	F2	F3	US1 US2 US3	-	+	+	U+ U-
	2
3
	1
PVPX
PVEH						2
						3
						1
	PVEH					2
						3
						1
			PVEH			2
						3
						1
										E
							- U	+
								DC
										V310176.A

1 To avoid being regarded as a fault, unused inputs must be connected to minus.

E Emergency stop

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Technical Information	EH Modules

Electronic alarm logic - EHA

Monitoring more than eight functions

With standard connections, EHA will monitor up to eight alarm outputs.

If more outputs are to be monitored, two or more EHAs can be connected in series by allowing the output from one EHA to control an input on the following EHA. This extends the capacity by seven inputs for every extra EHA.

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Technical Information	EH Modules

Electronic alarm logic - EHA

Electric remote to mechanical operation

Changeover between electric remote operation and mechanical operation

1Switch

2Unused inputs must be connected to minus

Positions

Position	Description	Comment
1	Electrical system operation	The hydraulics can only be operated by electrical remote control.
		The PVEs lock main spools hydraulically and prevent mechanical
		operation.
2	Off	The hydraulics cannot be operated either mechanically or electrically.
3	Mechanical system	The hydraulics can only be operated mechanically.
	operation	The relief valve is activated only via the switch.

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Technical Information	EH Modules
Electronic alarm logic - EHA
Technical data
	Supply voltage	UDC	11 to 30 V
		Maximum ripple	5%
	Current consumtion without output load		< 40 mA
	Input signal		Tapping from PVEH fault
			monitoring
		Fault-free signal	0 to 3 V
		Fault signal	8 V - UDC/Off
	Input impedance		>3 kΩ
	Output load		30 V / 1.5 A
	Ambient temperature		-30 to + 60°C [-22 to 140 °F]
	Enclosure to IEC 529		IP 42

EHA must be connected to supply voltage at the same point as PVEH.

Code number and weight

EHA mounting base code number	EHA base weight
155U1805	0.09 kg (0.20 lb)

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