MRA005 · 5 PUMP ALTERNATION CONTROL (PLUG-IN TERMINALS)

MRA005 alternating relay for groups of 5 pumps: 5 optocoupled inputs and automatic rotation of the starting order. 100–240 VAC.

Product type:	Pump alternating relay
Installation:	DIN rail, plug-in terminal blocks
Function:	Alternation of groups of 5 pumps
Control:	5 control inputs

Features

✓Automatic rotation of the starting order: all five pumps share the running hours
✓5 optocoupled control inputs, 3.5 kV isolation
✓5 outputs with volt-free contacts
✓5 s between pump starts
✓Memory of the last output activated
✓Supply from 100 to 240 VAC 50/60 Hz
✓Plug-in terminal blocks: wired in the workshop and replaced on site

Supply

100 – 240 VAC

Outputs

5 x SPST-NO 5A

Pumps

Mounting

DIN rail

1The control inputs (I1 to I5) receive the demand from a pressure switch, a level relay or a float switch.
2Each time the contact of input 1 (I1) opens, an alternation takes place: next time the following pump starts.
3Depending on the active inputs, more pumps are started, with 5 s between starts.
4This way the five pumps work in turns and none wears more than the others.

When does the starting order change?

Each time the contact of input 1 (I1) opens, an alternation takes place.

Which outputs does it have?

5 x SPST-NO 5A 250 VAC, with volt-free contacts.

What is the supply voltage?

From 100 to 240 VAC, 50/60 Hz.

Reference	MRA005 (100 – 240 VAC)
Series	M · modular DIN rail
Product type	Pump alternating relay with external signal
Pumps	5

Inputs	5 control inputs
Type	15 VAC optocoupled · 3.5 kV isolation

Alternation	Automatic rotation of the starting order
Time between starts	5 s
Memory	Last output activated

Operating temperature	−10 to +55 °C
Storage temperature	−25 to +85 °C

Compliance

CE · 2014/35/EU · 2014/30/EU