Pump Controllers With Position Feedback - Linde HPR-2 Manual

Pump controllers with position feedback

TL2-, LEP- and ETP-controllers offer a feedback of the swashplate position. Therefore they are – unlike LP-, E1L- and H1L-controllers
– not mounted on the valve plate housing, but on the pump housing. Besides their individual characteristics, these controllers have
some similar features.
P-axis (LEP/ETP): Pressure cut-off characteristic
LEP- and ETP-controllers offer a pressure cut-off (PCO), just like the LP-controller. This prevents the pump pressure exceeding a
previously set maximum. The PCO is set to a customer-specific value between 125 bar and 420 bar ex works. Using a control signal
at the XD port, the actual response pressure of the PCO valve of LEP- and ETP-controllers can be increased steplessly. The response
pressure of the valve is increased by 4.3 bar by every bar increase at the XD port. The maximum pressure of 420 bar must not be
exceeded.
2
XD
p
max
1 Displacement volume
2 Pressure
Maximum performance range of the pump
Pressure cut-off basic setting
Characteristic shifting by control signal
E-Axis (LEP/ETP): Electric flow setting
The swash angle and thus the flow of the pump is set by means of an electric signal with the LEP and ETP controller. The actual
current depends on the voltage-level of the application and the nominal size of the pump.
Without an electric signal, the pump swashes to minimal displacement.
2
1 Displacement
2 Pressure
Maximum performance range of the pump
Electro-proportional flow setting
Provided power
2
420
3
1
Q
max
1 Control pressure at XD port
2 Pressure cut-off response pressure
3 Pressure cut-off basic setting
100 %
1
0
Q
max
Rated size
RB
Regulation begin
RE
Regulation end
m=4,3
pXD
RB
Control current
Control current
12 V
105,135 464 mA
210 490 mA
280 524 mA
105 - 280 1200 mA
1
RE
24 V
232 mA
245 mA
262 mA
600 mA
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