Watson-Marlow 120 - Page 22

Watson-Marlow 120U IP31 pumps: operating instructions 8
Pin no 101U 401U 120U
1
Analogue input current
resistor (link to 0V)
Analogue input current
resistor
Analogue voltage/current
signal selection
2 Analogue speed input Analogue speed input (+10V)
Analogue speed input
(voltage/current)
3 Tacho output (0-5VDC) Supply +5V Ground 0V (analogue)
4 Remote direction enable Remote direction (reverse) Remote direction enable
5 Remote direction control Remote direction (forwards)
Remote direction selection
(CW/CCW)
6 Remote auto/man enable Linked for current offset For future use
7 Remote auto/man control Linked for current offset Remote auto/man selection
8 Remote stop Ground 0V Remote stop
9 Tacho output (0-5VDC) Analogue control (+1V) Tacho output (0-5VDC)
10 Ground 0V Supply +18V Ground 0V (analogue)
11 Ground 0V Remote auto/man control Ground 0V (digital)
12 Ground 0V Not connected Ground 0V (digital)
13 Supply +5V Not connected Supply +5V
14 Supply -5V Not connected Alarm output (5V TTL)
15 Supply +12V Ground 0V Supply +12V
Pin allocations, models 101U, 401U and 120U