6 System integration
Operating manual mzr-2521 and mzr-2921
42
Technical data subject to change without prior notice!
Last update: June 2019
6.8
Operation with the S-BL control unit (optional)
The micro annular gear pumps mzr-2521 and mzr-2921 with brushless DC motor
as drive be delivered with the S-BL control unit. This programmable control unit
enables to adjust speed for constant flow rates or the position of the motor for
the dosage of constant amounts of liquid. On the delivered diskettes or CDs you
will find a PC-program operating under Windows that enables to program such
parameters as speed, acceleration and current consumption. The delivery package
comprises also a null-modem cable for connection to a serial interface of a PC.
S-BL control unit
Type of control unit
4-Q servo amplifier
Nominal voltage
U
24
V
Power supply
U
B
12 - 30
V
Residual ripple
≤
2 %
Max. continuous output current
I
continuous
410*)
mA
Max. peak output current
I
max
700*)
mA
Speed range
10...6000*)
rpm
Input No. 1
input resistance
5
k
Ω
Nominal analog speed
voltage range
±
10
V
Nominal digital speed
PWM signal
low 0...0.5 / high 4...30
V
frequency range
100...2000
Hz
Input No. 2
open collector
max. U
B
/ 30 mA
no error
switched to GND
programmed as input
low 0...0.5 / high 3,5... U
B
V
Input No. 3
TTL - logic level
low 0...0.5 / high 3,5...30
V
PLC - logic level
low 0...7 / high 12,5...30
V
Program memory
6,6
kBytes
*) Values limited in the control unit with corresponding software
table 24
Technical data of the S-ND control unit
The control unit permits an easy startup of the pump with:
−
the possibility to connect the voltage supply to the delivered DIN socket
−
the possibility to connect the voltage supply with screw clamps
−
a 8-pole screw clamps connector assembly for the motor cable
−
speed set with potentiometer
−
analog voltage signal 0-10 V for speed control at the screw clamps
−
9-pole connection plug for the RS-232 interface
−
error output with status LED, programmable also as trigger input with screw
connections
−
tumbler switch S1 for the connection of digital input No. 3 of the motor
control unit