Pulsafeeder Pulsar DLC XP RC - Manual (Page 17)

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5.6.1 Analog Input (DLC-RC)
The Analog Input is used for remote control of the PULSAR flow. The input accepts current inputs
anywhere in the range of 0-25mA (e.g., 4-20mA) provided the 'span', (the difference between the
High and Low value), is greater than 2mA. Voltage signals in the 0-5 volt range are accepted but
displayed as current during Analog Input calibration.
Split-ranging, reverse acting, and ratio control are accomplished in the calibration routine. No
hardware adjustments are required. The channel is surge protected and fused for over-current
protection. The device is designed to avoid damage in the event high voltage is inadvertently applied.
Attach the analog signal generated by an external device (e.g., PLC) to the connection points labeled
'1-CURRENT1(+)' and '2-CURRENT1(-)' on the J4 terminal block labeled 'INPUT' (refer to
Figure 6). Attach the Positive lead to position 1 and the Negative lead to position 2. Position
indicators are printed on the circuit board above the terminal. The DLC-RC will provide
approximately 200 ohms of resistance to a current loop. The Analog Input is isolated from all other
inputs, outputs and earth ground. Follow the instructions in the Section 7 – General Operation for
Analog Input software set-up.
5.6.2 Leak Detection Input (DLC-RC)
The Leak Detection Dry Contact Input is designed to operate with the PULSAlarm leak detection
option. It is software configurable to generate an alarm, activate the alarm relay and/or shut down the
PULSAR motor. The input is internally powered -- only a mechanical switch closure is required for
activation. Attach one side of the switching device to the position labeled '3-ALARM(+)' and the
other side to the position labeled '4-ALARM(-)' of connector J4-INPUT (see Figure 6). A resistance
of 15K ohms or less is required across the two connections for proper detection. Follow the
instructions in the section 7-General Operation for Alarm Input (Leak Detection) software set-up.
5.6.3 Drum Level Input (DLC-RC)
The Drum Level Dry Contact Input is designed to monitor a single-point drum level sensor and
generate an alarm, activate the alarm relay and/or shut down the PULSAR motor. The input is
internally powered, only a mechanical switch closure is required for activation. Attach one side of
the switching device to the position labeled '5-LEVEL(+)' and the other side to the position labeled '6-
LEVEL(-) of connector J4-INPUT (see Figure 6). A resistance of 15K ohms or less across the two
terminals is required for proper detection.
This input is also commonly used as a “RUN/STOP” input and can be connected to any appropriate
switching device or PLC output. Follow the instructions in the Section 7-General Operation for
Drum Level Input software set-up.
5.6.4 Second Analog Input (DLC-RC)
The Second Analog Input is reserved for future use. Make no connection here.