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→ Introduction
LMI's PD7 can be externally controlled via pulse input, remote start stop, and tank level alarms. This article will provide instructions on how to use the external pulse control function.
📺 Video: PD Series Metering Pump Inputs
Follow the video tutorial or click the timestamp next to any step to jump to that point in the video.
Tip: Tap the ▶ # to expand or collapse more detailed instructions
📋 External Pulse Control
Control the speed of the pump via an incoming pulse signal from an external pacing device such as a flow meter. The pump adjusts its stroke rate (speed) proportionally to the frequency of incoming pulses, enabling precise dosing.
Step 1: Connect Pacing Device
Step 1: Connect Pacing Device
With the included 5-pin cable, connect the external pacing device (such as a flow meter) using the wires shown in the video
Step 2: Configure External Pulse Control Settings
Step 2: Configure External Pulse Control Settings
With the pump stopped, press the Menu button to enter the menu. Enter the external pulse control settings to configure the parameters. Determine the ratio of incoming pulses to desired flow rate.
Step 3: Adjust Parameters
Step 3: Adjust Parameters
Highlight the parameter you wish to change, press Enter to edit, use the arrows to select the desired value, and press Enter to save. If desired, set a limit for the maximum flow rate as a percent of the pump's capacity. Adjust the minimum pulse width as needed.
Step 4: Enable External Pulse Mode
Step 4: Enable External Pulse Mode
Highlight the checkmark and press Enter to enable external pulse mode. Confirm that external pulse mode is active by the icon on the notification bar.
Step 5: Start the Pump
Step 5: Start the Pump
Press Start/Stop to start the pump. As incoming pulses are received, the pump will adjust its stroke rate to dose as configured.
📋 Remote Start/Stop
Remote start/stop functionality enables external activation and control of the pump. With the correct wiring connections, the pump will start when the remote switch is closed and stop when the switch is opened. This feature can be disabled by manually pressing the start/stop button on the pump
Step 1: Connect Remote Switch
Step 1: Connect Remote Switch
With the included 5-pin cable, connect to the remote switch using the wires shown in the video.
Step 2: Start and Stop the Pump Remotely
Step 2: Start and Stop the Pump Remotely
Once the remote switch is closed, remote start/stop mode is enabled, and the pump will start. Opening the switch will stop the pump. The mode can be disabled by manually pressing the Start/Stop button on the front of the pump.
Info: White = Common; Brown = Input
📋 Tank Level Input
The tank level input feature enables low and empty tank indication by connecting a single or dual level switch. When the low tank switch is triggered, a low-level icon appears on the pump's display, and when the empty tank switch is triggered, the pump stops and displays an empty level icon. The pump will automatically restart once the tank is refilled.
Step 2: Monitor Tank Level Indication
Step 2: Monitor Tank Level Indication
When the low tank switch is triggered, the pump indication ring will turn yellow, and the low-level icon will appear in the notification bar. When the empty tank switch is triggered, the pump will stop, the indication ring will turn red, and the empty level icon will appear in the notification bar.
✅ You are now ready to use your LMI PD7 Pump to remotely control pump speed, stop/start, or level warnings and alarms.
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