GB-2464
Rev. March 1996Power Amplifier
EEA-PAM-5**-A-32 for Proportional Control Valves Contents
General Description The following power amplifier models are covered in this catalog p
The power amplifier has five voltage i t (i ti )d t
g inputs (one inverting) and a current input for 0-20 mA. Adjustments for t in ut for 020 m . djustments for t zero point or deadband compensation and for gain allow the amplifier to be easily tuned to the proportional control valve The ramp f nction generator can
valve. The ramp function generator can be switched on and off using the “ramp enable” control.
Monitor points on the front panel allow Monitor points on the front panel allow measurement of the conditioned
command signal, and either of spool
iti LVDT i l (f l g position LVDT signal or (for valves without LVDT) of solenoid current.(“Conditioned command signal” is the (Conditioned command signal is the input signal modified according to ttings of t zero point or deadband compens tion g in nd r mp compensation, gain and ramp functions.)
F t Features
U f i dl f t l ith ll th
F Ur-friendly front panel with all the necessary adjustments, LEDs and monitor points
几月开学
monitor oints F Electronic overload protection with a tomatic ret automatic ret
F Pul width modulation for high ffi i
g efficiency Can be equipped with plug-in F Can be equi ed with lug-in modules for special functions
F
Switchable ramp function generator for controlling rates of increa and decrea of output F 24V DC power supply
历历在目是什么意思F Either current or voltage input signals F
Standard input and output signals
Vickers ®
Accessories
Warning: Electromagnetic Compatibility (EMC)
It is necessary to ensure that the unit is wired up in accordance with the connection arrangements shown in this leaflet. For effective protection, the ur’s electrical cabinet, the valve subplate or manifold and the cable screens should be connected啤酒有没有保质期
to efficient earth (ground) points. The metal 7-pin connector part no. 934939 should be ud for the integral amplifier.
In all cas, both valve and cable should be kept as far away as possible from any source of electromagnetic radiation such as cables carrying heavy current, relays and certain kinds of portable radio transmitters, etc. Difficult environments could mean that extra screening may be
necessary to avoid the interference.2
Front Panel
[4]
Model
523, 525, 533, 535, 561, 568 and 581
513
Potentiometers
[1][2][3][5]LVDT failure, red
[6][7][8][10]LED
[9]LEDs
[11]Potentiometers
[13][12]Monitor points Y
[14][15][16]Y Ø 2 mm (0.0787I 541, 553
[20]Adjust valve zero出院祝福语
Potentiometer
Electrical Block Diagram
EEA-PAM-523/525-A-32
533/535
3
Operating Data
4
Model513523
525533535541553561
568
救护人员571581
Max. solenoid current1,6A1,6A2,7A2,7A3,2A3,2A1,8A2,9A3,2A Amplifier input current at 0V command
林业工作总结
signal (MP1)0,3A0,3A0,3A0,3A1,7A1,7A1,4A1,1A1,7A Deadband compensation
Factory tting (% of max. spool stroke)–25%15%10%––10%10%10%
Adjustment per direction (% of max. spool stroke from centered position)–0 -
50%
0 -
50%
0 -
50%
––0 -
50%
0 -
50%
0 -
50%
Gain
Factory tting10%/V10%/V10%/V10%/V10%/V10%/V10%/V10%/V10%/V被偷走的时光
Adjustment per direction2,5 -
10%/V 2,5 -
10%/V
2,5 -
10%/V
2,5 -
10%/V
––2,5 -
10%/V
2,5 -
10%/V
2,5 -
10%/V
Zero adjustment (% of max. spool stroke)0 -
50%–––+/–
再接再励25%
+/–
25%
–––
5
