99
P a r r I n s t r u m e n t C o m p a n y
1 - 8 0 0 - 8 7 2 - 7 7 2 0
4
R e a c t o r C o n t r o l l e r s
Rear view of the 4871 Process Controller. This 4871 has
been set up to run six vessels simultaneously in an
MRS 5000 apparatus.
The power controller or controllers will be
designed for each individual system, but as an
example, a 4875 Power Controller includes:
1. A solid-state relay sized to handle the
current drawn by the vessel heater. This is com-
monly a 25-amp relay with its protective fuses.
2. A solid-state relay sized to drive a solenoid
valve to control the flow of cooling water to the
vessel.
3. A motor speed controller that converts the
analog output signal from the controller to the
electrical signal required to drive the specific
stirrer motor. A circuit breaker for the motor is
also provided.
4. A lockout relay to shut down the heater
circuit should an alarm condition be detected.
5. Status lights for the principal functions.
6. Connections of appropriate style for the
power input and device outputs.
This custom order is set up to run sixteen reactors, two 4871 Process Controllers,
with sixteen 4875 Power Controllers all through one PC.
The 4875 Power Controller module is flexible and can be
used in remote locations from the system being controlled.
4875 Power Controller back panel for 230V model.
