Pulsafeeder PULSAtron Series MP EN - Manual (Page 22)

22
OUTPUT RELAY
Each pump has the option of being provided with one of two separate normally open output relay options as described
below. Relays close according to the option selected, and remain closed during the condition specified for the selected
option except for the Repeat Strokes option.
The Signal Level output relay option is via the output signal terminals on the pump control panel. It is designed to provide
direct or inverted voltage output signals as shown in figure P. The voltage input must have a high-impedance
characteristic and must not exceed 24 VDC. The pump circuit can source or sink a maximum current of 10 mA. The
signal cord is provided with the pump and has the following polarity when connected to the pump terminals.
White = Positive (+)
Black = Common
The Power Level option is via the power relay cord which exits the pump below the control panel. The power level relay is
a zero-crossing triac-type solid-state switch as seen in figure Q which is designed to switch AC current only and has the
following ratings:
Voltage
Current Power
Minimum = 12 VAC, 50/60 HZ minimum = 10 mAmps minimum = .12 watts (at 12 VAC)
Maximum = 250 VAC, 50/60 HZ maximum = .5 Amps maximum = 120 watts (at 240 VAC)
* Load can be any device which meets the above
voltage and current limits (i.e., lamp, alarm, siren, relay,
etc.)
: Do not apply power directly to the relay cord without a sufficient load to limit current as indicated
above. Do not exceed the specified voltage rating. Excess current or voltage will damage the
pump and cause fire and electrical shock hazards. Do not install any type of standard power plug
to the relay cord.