Baker Hughes Masoneilan 4700P, Instruction Manual

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Electrical Installation of 4700E/4800E
Electrical connections should be made as shown in Figure 11 . The terminals will accept wire
sizes up to AWG 14.
The loop controller driving the positioner must be capable of supplying 4-20 mA with an output
voltage compliance of at least 5 VDC.
The available output voltage of a current source is reduced by loop wiring resistance. This can
be checked by connecting a resistor of value (250 Ohms + Loop Resistance) across the output
of the controller and verifying that at 100% controller output 20 mA is obtainable.
CAUTION
Do not use a voltage source to drive the positioner as it
may cause permanent damage.
CAUTION
The positioner must be installed in accordance with
local and national codes of practice in both general
purpose and hazardous area locations. The electrical
components are fully isolated from ground and
therefore grounding is unnecessary for functional
purposes. Grounding may be necessary to conform to
installation codes.
The positioner is normally supplied with a 1/2” NPT
conduit entry. (M20 is optional) Internal and external
ground terminals are provided for use if grounding is
required.
Figure 11 - Electrical
Connections