Watson-Marlow OEM - Manual (Page 3)

3
1.0 Description
This speed control board has been specifically designed for OEM use, providing a speed control ratio better
than 10:1.
It is capable of speed control, remote stop, a choice of drive direction, and
accepting remote speed control signal input. With the addition of extra components to the standard board,
options of instant direction reverse, power on LED, AC power supply input, board mounted speed control
potentiometer and maximum speed (prime) switch are available.
2.0 Specification
• Suitable for use with Watson-Marlow 102FD/R 12V DC motor and 313FD/D 12V DC motor
• Eurocard format
• 32 way edge connector (mating connector supplied)
• Suitable for pillar mounting
• Suitable for use with 20V to 30V DC power supply or AC mains with an appropriate transformer. Refer to
section 6.3 (for 102FD/R and 313FD/D motors).
3.0 Identification
The board is available in two basic versions; part number 019.2021.000 for the 102FD/R motor as a self
contained unit, and part number 039.2021.000 for the 313FD/D motor with an external heatsink-mounted
transistor. For the 313FD/D version, the additional connections required for the external transistor are covered
in the “313FD/D 12V DC motor - Externally mounted transistor” section.
This board should be protected by suitable fusing.
4.0 313FD/D 12V DC motor - Externally mounted transistor
The following external connection has to be made to allow the speed control PCB to be compatible with the
313FD/D drive.
5.0 External component connections
The connections described in sections 5.1, 5.2 and 5.3 are required for all applications. Those described in 5.4
are optional. None of these require any additional board mounted components and all are common for the
102FD/R and 313FD/D versions.
Transistor Q2 is an externally
mounted TIP 141. An adequate
heatsink must be provided.
Suggested area 1000cm
2 (130 sq in)
in free air.
Transistor detail:
Watson-Marlow part number ST0019
RS part number 294-839
Heatsink O.65°C/W
RS part number 403-099
5.1 Power supply
Terminals 17(+ve) and 32(-ve), 20V to 30V DC from
either battery or a stabilised DC power supply.
For reverse polarity protection add D5 and use terminals
16(+ve) and 32(-ve).
Rating: 102FD/R = 0.5A, 313FD/D = 2.0A