KSB EA-C, Installation & Operating Manual, Page: 10 / 44

4 Description
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EA-C
4 Description
4.1 General description
▪ Actuator for the automation of a control valve
Actuator with continuous-action or 3-point actuation in 24 V AC/DC, 230 V AC and
400 V AC 3~. Actuator for valve type series BOA-CVE H and BOA-H Mat E.
Versions
Continuous-action actuators in 24 V AC/DC, 230 V AC and 400 V AC 3~ versions and a
24 V AC 3-point version
Variable speed actuator
control
▪ 24 V DC motor, controlled by pulse-width modulation (PWM)
▪ Absolute-coded feedback via precision potentiometer
▪ Positioning function
▪
Active feedback function
▪ Automatic commissioning
▪ Comprehensive diagnosis options
Parameterisation by
software
▪
Actuator functions can be adapted to a wide variety of process conditions by
means of current and voltage monitoring.
▪ Setting of valve-specific details
▪ Setting of actuating force and actuating moment
▪ Setting of stroke and actuating speed
▪
Configuration of messages
▪ Freely programmable characteristic curve corrections
3-point actuators in 230 V AC and 400 V AC 3~ versions
▪ The actuator can be set by limit switches in both opening and closing direction
▪
Torque transmission by disc spring stack in closing direction.
▪ 2 limit switches for visualising the limit positions included as standard
4.2 Designation
Example: EA-C 250
Table 4: Designation key
Code Description
EA-C Product name
250 Actuator size and maximum actuating force of 25 kN
4.3 Name plate
EA-C Antrieb
Auftrag / Pos.:
order No. / pos.:
2120000000 / 0000
Stellkraft:
act. force:
....... N
Istwert:
feedback:
.......
Sollwert:
set value:
.......
Antrieb:
actuator:
EA- C ....
IP..
Betriebsspannung:
power supply:
....... V
Antriebsnummer:
actuator no.:
............
1 2 3
4 5 6 7 8 9 10
Fig. 1: Actuator name plate (example)
1 Order number 2 Order item number
3 Product name 4 Supply voltage