PROam20 - Digital valve amplifier0 pages

Features
• Power amplifier for proportional directional
valves
• Internal controlled by a modern
microcontroller
• Compact housing
• Adjustment via potentiometer
• Imin, Imax, RAMP and PWM-frequency
adjustment via potentiometer
• Current range (per DIL switch): 0,8A and
1,6A
Technical data
Power supply [VDC] 10…30 (incl. ripple)
Current consumption [mA] <60 + solenoid current
External fuse [A] 3 (fast)
Analoque inputs [V] +/- 10
[V] +/- 8
[V] 0…5…10
[V] 0…4…8
[mA] 4…12.20
[V] +/- 5
[V] +/- 4
[mA] 4…20
Reference voltages [V] 8; 10 mA max.
PWM outputs
max. load [A] 0,8 or 1,6 (per DIL switchable)
Frequency [Hz] 70…125
Sample time
(signal conditioning) Depending of the PWM frequency
Adjustments
Imin [%] 0…60 (0=preadjusted)
Imax [A] 0,7…1,6
[A] 0,4…0,8
RAMP [s] 0,05…15 (0,05=preadjusted)
PWM Frequency [Hz] 70…125 (125=preadjusted)
Housing Snap-On Module EN 50022
Polyamide PA6.6
Combustibility class V0…V2 (UL94)
Protection class [IP] 20
Temperature range [°C] -20…55
Humidity [%] <90 (not condensing)
Dimensions [mm] 120(d) x 100(h) x 23(w)
Connections RS232: 3,5mm JISC-6560
4x4pol. Screw terminals
PE: direct via DIN rail
EMC EN 50081-1
EN 50082-2
Block diagram
AMCA HYDRAULIC FLUID POWER B.V. Tel. +31 (0)50 3023577
P.O.BOX 18 9790 AA Ten Boer NL Fax. +31 (0)50 302 1226
B.Kuiperweg 33 9792 PJ Ten Post NL e-mail: sales@amca-nl.com
The Netherlands homepage: http://www.amca-nl.com
Digital Valve Amplifier Series PROam 20
Publ. L-EA-20-E-05/07
Power supply
7
8
1
2
12..30V
0V
PROam20
Power stage
MIN A
MAX A
10
9
Input
+/- 10 V,
+/- 8 V,
0...10 V
0... 8 V
12 8 V reference voltages
DITHER
RAMP
5 V
8 V
Enable 15
MCU
3
4
MAX B MIN B
11
S1.1
S2.1 S2.2
Solenoid current range
P1
P2
P5
P6
P3 P4
Solenoid A
Solenoid B
S1.2 S1.3
4... 20 mA 13