3-22 MASTERFLEX
®
Digital Pump Drive Operating Manual Masterflex
Section 3
Operation
INPUTS
Remote CW/CCW, Remote Start/Stop, Remote Prime, Remote Current
or Voltage Enable:
The remote control inputs work with current sinking outputs (open-
collector NPN transistor outputs without passive pull-up resistors) or
contact closures to DC common (earth ground). A continuous active low
to the Remote Start/Stop input causes the drive to run, while a continuous
active low to the Remote CW/CCW input causes the drive to run CCW.
The motor is brought to a controlled stop before reversing direction. A
continuous active low to the Remote Prime input causes the drive to run
at full rated speed.
CURRENT CLOSED INPUT 1 mA TYP
VOLTAGE OPEN INPUT 3.2V TYP
THRESHOLD CURRENT TO ACTIVATE 0.5 mA TYP
Remote Analog Input:
4-20 mA Input: 250 ohms typical input impedance ref. to signal
ground. 4 mA, Stop; 20 mA, Full Speed (Default
Settings) 12 Bit Resolution
Overload Capability: 10V or 40 mA max.
0-10V Input: 10 K ohms typical input impedance ref. to signal
ground. 0V, Stop; 10V, Full Speed (Default
Settings) 12 Bit Resolution
OUTPUTS
4-20 mA Output: 0 to 600 ohms max. load referenced to earth ground.
4 mA, Stop; 20 mA, Full Speed (Default
Settings) 12 Bit Resolution
0-10V Output: 1.0 K ohms min. load referenced to earth
ground. 0V, Stop; 10V, Full Speed (Default
Settings) 12 Bit Resolution
Tach Output: Open Collector, 1.0A @ 28V DC
Frequency range: 1 to 3000, 50% Duty Cycle. (10 Hz = 1 pump
rpm). See Open Collector Output.
Motor Running Normally Open and Normally Closed when drive is
Output Relay: running.
General Alarm Normally Open, closed when an alarm is displayed.
Output Relay:
Local/Remote Indicator
Normally Open, closed when in remote control
Relay: mode (Voltage Input or Current Input).
24V DC Aux. Output: 24V DC @ 0.200A
Table 3-1. Remote Control Inputs and Outputs.
Remote Control Inputs
and Outputs
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