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EXPLANATION OF SYMBOLS
This CAUTION symbol may be present on the Product Instrumentation and
literature. If present on the product, the user must consult the appropriate part of
the accompanying product literature for more information.
This CAUTION symbol indicates that the surface may be hot.
Protective Earth (PE) terminal. Provided for connection of the Protective Earth
(green or green/yellow) supply system conductor.
Earth Ground. Functional earth connection. This connection shall be bonded to
Protective earth at the source of supply in accordance with national and local
electrical code requirements.
SAFETY INFORMATION
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of
correct voltage and current handling capabil-
ity.
2. Ensure that the equipment is connected to
electrical service according to local national
electrical codes. Failure to properly connect
may create a fire or shock hazard.
3. For continued protection against possible
hazard, replace fuses with same type and
rating of fuse.
4. Disconnect from the power supply before
maintenance or servicing.
To avoid personal injury:
1. Do not use in the presence of flammable
or combustible materials; fire or explosion
may result. This device contains components
which may ignite such material.
2. Refer servicing to qualified personnel.
4871 Process Controller Supplemental Instructions
GENERAL SPECIFICATIONS
Electrical Ratings
115VAC, 5.0 Amps, 50/60 Hz
230VAC, 5.0 Amps, 50/60 Hz
Before connecting the components of the 4871
Process Controller, the user must be sure that
the line, load, and other characteristics of the
installation do not exceed the following limits:
Voltage. The line voltage should not differ from
the rated voltage shown on the nameplate of
the 4871 by more than 10 percent.
Frequency. This system can be operated from
either a 50 or 60 Hertz power supply without
affecting their operation or calibration.
Current. Loads drawn from the back of the 4871
must not exceed 5 amperes.
Thermocouple. Unless otherwise specified,
all 4871 Process Controllers operate with a
Type-J (Iron-Constantan) thermocouple. The
total resistance of the thermocouple and the
lead wires should not exceed 100 ohms. If the
resistance of the thermocouple circuit is higher,
it will not function properly.
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