Watson-Marlow 101F - Manual (Page 4)

4
101U/R Automatic operation
•
Set the Auto/Manual switch to Auto.
For all auto and remote control operations, the drive is supplied with a 15 pin D connector.
Never apply mains voltage across any pins on the 15D so cket. Up to 30V may be applied across
pins 2 and 10, but no voltage should be applied across other pins except where specified.
Permanent damage not covered by warranty may result in both instances.
The pump is controllable by an analogue pr ocess signal of up to 30V or 32mA. The pump will provide an increasing
flow rate for rising control signal ( non - inverted response ) or an inc reasing flow rate for falling control signal ( inverted
response ).
•
Signal offset is the process signal level which has to be reached in order for the pump rotor to start rotating.
•
Signal range is the change in process signal level necessary to produce the required change in pump rotor speed.
For example, when using a 4mA to 20mA process signal:
Pump response Signal offset Signal range
Non-Inverted 4mA 16mA
Inverted 20mA 16mA
For voltage m odes, a s table variable DC voltage s ource c an be us ed in c onjunction with a DC voltmeter, (maximum
30V DC). Polarity set for a non-inverted response. Reverse polarity for an inverted response.
Voltage signal
Input impedance 220 kohms
Response Range V Offset V Pin 10 Pin 2
Non-inverted 5 to 30 0 to 30
- +
Inverted 5 to 30 0 to 30
+ -
For current modes, the s ame DC s ource can be us ed in c onjunction with a DC m illiampere meter, (maximum 32mA).
Polarity set for a non-inverted response. Reverse polarity for an inverted response.
Current signal
Input impedance 250 ohms
Response Range mA Offset mA Pin 10 Pin 2 Link
Non-inverted 12 to 30 0 to 30
- +
1&10
Inverted 12 to 30 0 to 30
+ -
1&10