Pulsafeeder Pulsar DLCM - Manual (Page 7)

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1. Introduction
The DLCM is an advanced microprocessor based controller designed for use with the PULSAR diaphragm
metering pump. It controls the output of the pump by varying its stroke rate and the amount of fluid
discharged with each stroke. It has many advanced features that allow it to operate in a wide variety of
industrial environments.
This instruction manual covers all standard features of the DLCM and where applicable, specific options.
1.1 Description
The DLCM integrates a motor speed controller and a stroke length controller into a single pump mounted
package. Its purpose is to precisely adjust the flow of a process media by adjusting the pump motor speed
and stroke length.
The DLCM is designed for the international industrial market. The device is factory configured and
calibrated for the attached pump. The man/machine interface is user friendly. Local setup and control is
achieved through the nine button keypad and a back-lit two-line liquid crystal display. Pump output is
displayed as a percentage of stroke length position and motor speed, or in units of calibrated flow: CMH,
GPH, LPH, CCH, CMM, GPM, LPM, or CCM. In addition, the DLCM display supports any one of four
languages: English, French, German or Spanish.
The DLCM supports a variety of remote control options. These inputs and outputs are fully isolated for
improved protection and reliability. A Batch feature, with up to three independent programs, supplements
the control features and allows for greater flow turn down.
The DLCM includes the PULSAnet Serial Communications system. This allows the DLCM to interface
digitally to other DLC’s, DLCM’s, PLC’s, or PC’s using the MODBUS™ communications protocol over
a 4 wire RS-485 network.
The DLCM is designed to simplify and automate the calibration of pump flow and analog signals. Flow
calibration uses on-screen prompting, automated pump operation, and automatic curve fitting to eliminate
the need for stop-watches, calculators and reduces the possibility of human error. Analog signal
calibration is also accomplished by simple key-pad entry. It includes real-time display of signal levels.
This eliminates the need for external meters.
The DLCM readily accepts PULSAlarm leak detection, Level Input detection or Remote Start/Stop
station inputs that can be configured to stop the pump and/or activate an alarm relay.
The Remote Start/Stop cannot be configured to activate the alarm relay.
Failures are time and date stamped into memory for later retrieval. Other diagnostics include analog
signal failure and line power failure monitoring. These are also time and date stamped and may be preset
to control stroke position or motor status upon detection of a failure.
Security password protection may be activated to prevent tampering. All settings and diagnostics have a
battery back-up for up to 10 years in the absence of power.
The DLCM is available in any combination of 120/240 VAC, 50/60Hz. Protection exists to prevent
damage against over or under voltage conditions in the event the wrong power line source is used.