Page 25
TO GET ASSISTANCE, CALL: 919-774-7667
ZENITH PUMPS
Use 4-20 (mA) as Setpoint
1. Preliminary Action:
•
External device which supplies 4-20 (mA) speed set-
point signal to ZeDrive
•
Locate Analog Select Jumpers on “Control Board”:
1. Loosen up 6 screws on the back panel, and 2
screws located on the heat sink of ZeDrive
2. Remove the back panel, place ZeDrive as shown
at left. The top board is the “Control Board”, and
the bottom one is “Drive Board”
3. Locate Analog Select Jumper as shown at left
4. Depend on the signal, change the jumper set-
ting as shown at the left
•
Pump Capacity — C
P
(cc/rev)
•
Reducer Gear Ratio — R. If the pump is directly coupled with the motor, the gear ratio R=1
•
Motor maximum speed — V
M
(RPM), 1800 (RPM) for most of systems supplied by Zenith
•
No. of Teeth of Feedback Gear — N, 120 for most of systems supplied by Zenith
2. Calculation:
•
To set the motor speed to be V (RPM) ( 0
≤
V
≤
V
M
), the pump to be V (RPM) ( 0/R
≤
V
≤
V
M
/R
), or the output to be V (cc/min) ( 0/R×C
P
≤
V
≤
V
M
/R×C
P
), the corresponding for-
mula for the mA current value C
mA
is:
C
mA
= (20 - 4) / (V
M
- 0) × V + 4 (mA)
C
mA
= (20 - 4) / (V
M
/R - 0/R ) × V + 4 (mA)
C
mA
= (20 - 4) / (V
M
/R×C
P
- 0/R×C
P
) × V + 4 (mA)
3. Coding:
Check and change the following codes
Code 20 = Max. Setpoint in Engineering Unit (refer to sections “Set and Display as …”)
Code 22 = Max. Display in Engineering Unit (refer to sections “Set and Display as …”)
Code 31 = N
Code 34 = V
M
Code 61 = 1
Code 63 = 1
Code 84 = 4
4. Wiring:
•
Connect the wires of the 4-20 (mA) speed control signal
with the ZeDrive as shown at the left
5. Result:
•
4-20 (mA) signal can be used to control the speed of ZeDrive
Analog Select Jumper
Analog Select Jumper Location
Heat Sink
Transformer
Feedback
(Not this jumper)
4-20 mA:
Left
0-10 VDC:
(Default)
disregard
16
17
J4
10
J3
Shield
Signal
Common
From Device
Summary of Contents for ZeDrive
Page 10: ...Page 9 TO GET ASSISTANCE CALL 919 774 7667 ZENITH PUMPS Control Cabinet Wiring...
Page 18: ...Page 17 TO GET ASSISTANCE CALL 919 774 7667 ZENITH PUMPS Typical Applications Solutions...
Page 38: ...Page 37 TO GET ASSISTANCE CALL 919 774 7667 ZENITH PUMPS Trouble shooting Fault Information...
Page 45: ...Page 44 TO GET ASSISTANCE CALL 919 774 7667 ZENITH PUMPS Complete Code List...
Page 59: ...Page 58 TO GET ASSISTANCE CALL 919 774 7667 ZENITH PUMPS System Drawings...
