WATSON MARLOW
NEMA 4X protection
All pumps meet the criteria for IP66
and NEMA 4X classification: they are secure against
high-pressure washdown. NEMA 2 wipe-down models
are also available in the 520 and 620 series.
Status outputs
Four configurable relay outputs. Monitor Run/Stop;
Rotation direction; Auto/Manual operation; general fault
alarm; automatic shut-down if the guard is opened;
leak-detected shutdown.
RS485
Full industrial-standard connectivity with RS485 and
easy-wire relays for permanent connection to control
systems including PC, PLC and SCADA.
Control range
520N: 0.1-220 rpm; 620N: 0.1-265 rpm; 720N:
0.1-360rpm
Voltage/frequency
Filtered 100-120V/200-240V 50/60Hz 1ph
Maximum voltage
fluctuation
±10% of nominal voltage. A well regulated
electrical mains supply is required along with
cable connections conforming to the best
practice of noise immunity
Installation category
(overvoltage)
II
Power consumption
520N: 135VA; 620N: 250VA; 720N: 350VA
Full load current
520N: <0.6A at 230V; <1.25A at 115V;
620N: <1.1A at 230V; <2.2A at 115V;
720N: <1.5A at 230V; <3.0A at 115V
Eprom version
Accessible through pump software
Enclosure rating
IP66 to BS EN 60529; Equivalent to NEMA 4X
to NEMA 250* (indoor use). Suitable for heavy
industrial, process and harsh environments.
The drive uses a Gore membrane vent to equalize
the pressure inside the enclosure and to prevent
ingress of water and corrosive vapors.
Operating temperature
5C to 40C, 41F to 104F
Storage temperature
520N: -40C to 70C, -40F to 158F;
620N, 720N: -25C to 65C, -13F to 149F
Maximum altitude
2,000m, 6,560ft
Humidity (condensing)
10% - 100% RH
Noise
520, 620 <70dB(A) at 1m, 720 <85bB(A) at 1m
Advanced technology and design underlie Watson-Marlow
Bredel industrial pumps’ long life of quality service.
Our reliability record is maintained by features such as
brushless DC drive, a toughened LCD screen and a rugged
membrane keypad. The chemical resistance of the whole
range outlasts our competition; using a powder-coated NEMA
4X casing that outperforms stainless steel when exposed to
aggressive fluids such as ferric chloride or sodium
hypochlorite.
Rugged and reliable
Speed scaling
Programmable twin analog inputs allow flow
pacing to be coupled with downstream quality
feedback. The second input over-rides the main
speed control, making stroke adjustment on a
diaphragm pump redundant. Drop-in diaphragm
pump replacement could not be simpler.
Accuracy
Class-leading flow control up to 3,600:1 and
simple, accurate configuration mean that your flow
will match your needs precisely. Couple that with
tube bores from 0.5mm to 25.4mm and you have
a range of unbeaten versatility.
PIN-secure process
protection
Customize your pump setup to your precise
validated process needs and lock it. With twin
Pin-secure Process Protection, top-level PIN-code
holders retain full control. Calibration can also be
released to production staff with second-level PIN
access.
Operator safety
Operator safety comes first, with sturdy metal
or impact-resistant guards and drain ports for
safe disposal of spillages. Tool lockable or
electronic guard switches are standard on all
pumps. Optional leak detection is available for all
models.
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We have the technology
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