Watson-Marlow OEM - Manual (Page 5)

5
6.0 Options
The following connections require additional board mounted components. These may be obtained from Watson-
Marlow and part numbers are given. In addition an RS Component part number is given in some cases as an
alternative source of supply. Where part numbers are not stated but signified with ****** please contact Watson-
Marlow Technical Support for further information
6.1 Direction reverse relay
With the addition to the board of the following components, the motor may be connected with automatic
reverse capability. (Reverse motor connections to terminals 7 & 14).
Switch contact rating - negligible
Note: With the switch open, motor connection pin 11 is +ve.
6.2 “Poweron” LED
With the addition to the board of a resistor (R14), a “power on” LED may be connected.
Note: R14 to be chosen to suit supply voltage and LED type.
Suggested value for type above at 20-25V 1k , ½ W
Watson-Marlow part number RC 0118
RS part number 132-494
Suggested value for type above at 25-30V 1k5, ½ W
Watson-Marlow part number RC 0102
RS part number 132-539
Component Reference Type Watson-Marlow RS part
part number number
Relay RL1 12V DC coil ****** 376-149
Diode D3 IN4005 SD0020 261-182
Resistor R13 100k Ω RC0142 148-972
Transistor Q3 TIPP116 ****** 638-627
Resistor R18 180 Ω 1/2W RC0156 132-315 * 20-25V DC supply
270 Ω 1/2W RC0103 132-359 * 25-30V DC supply
and AC supply (see
6.3 AC supply input)
LED
Watson-Marlow part number SD 0035
RS part number 590-474