Watson-Marlow 120U/D1 - Manual (Page 16)

Watson-Marlow 120U IP31 pumps: operating instructions 2
2.1 Pump
specifications
A nameplate is fixed to the rear of the pump. It con-
tains manufacturer and contact details, product ref-
erence number, serial number and model details.
120U
This pump can be controlled from the keypad or
remotely. It features:
Manual control
Speed adjustment; run and stop; direction con-
trol; “max” key for rapid priming; “auto start”
for automatic power recovery; “auto” key for
changing between manual and auto control
Remote digital control
The pump can be digitally controlled with a
contact closure or logic input signal
Analogue control
The pump speed can be controlled through an
analogue signal input of 4-20mA or 0-10V
Outputs
Logic output designated for an alarm only
DC Tacho output
Pump specifications
Control range (turndown ratio)
Manual control:
With 102R: 0.1-32 rpm (320:1)
With 114DV: 0.1-200 rpm (2,000:1)
With 400D1: 0.1-200 rpm (2,000:1)
With 400DM2: 0.1-100 rpm (1,000:1)
With 400DM3: 0.1-100 rpm (1,000:1)
Auto control:
With 102R: 0.01-32 rpm (3,200:1)
With 114DV: 0.01-200 rpm (20,000:1)
With 400D1: 0.01-200 rpm (20,000:1)
With 400DM2: 0.01-100 rpm (10,000:1)
With 400DM3: 0.01-100 rpm (10,000:1)
Power supply DC input 24V @ 1A
Software version Accessible through combination keypress
Enclosure rating
IP31 to BS EN 60529. Equivalent to NEMA 2, suiable for indoor
use. Protected against dripping water and falling dirt. May be
wiped with a damp cloth, but should not be immersed
Pumphead options 114DV, 102R, 400D1, 400DM2 and 400DM3
Operating temperature range 5C to 40C, 41F to 104F
Storage temperature range -25C to 65C, -13F to 149F
Maximum altitude 2,000m, 6,560ft
Humidity (non-condensing) 80% up to 31C, 88F, decreasing linearly to 50% at 40C, 104F
Weight See Section 1, General information
Noise <60dB(A)
Function comparison, models 101U and 120U
Function 101U 120U
Analogue
input 0-30mA and
0-30V
4-20mA and 0-10V
Range and
off-set
trimming
possible
can only set the
maximum speed
Signal
inversion
possible not possible
Tacho
output +5V and –5V at
maximum speed 5V at maximum
allowed speed
Input
impedance
255
Ω
250
Ω
Max speed
options
2 rpm or
32 rpm, model-
dependant single speed range,
pumphead-
dependant
Speed
increments 10% or 1%
increments
0.1 rpm in manual
mode and 0.01 rpm
in analogue mode
Analogue
control 2,000:1
control ratio 20,000:1
control ratio