PD6801 Explosion-Proof Loop-Powered Feet & Inches Level Meter
Instruction Manual
10
Cover Jam Screw
The cover jam screw should be properly installed
once the meter has been wired and tested in a safe
environment. The cover jam screw is intended to
prevent the removal of the meter cover in a
flameproof environment without the use of tools.
Using a M2 hex wrench, turn the screw clockwise until
the screw contacts the meter. Turn the screw an
additional 1/4 to 1/2 turn to secure the cover.
Caution: Excess torque may damage the threads
and/or wrench.
Connections
To access the connectors, remove the enclosure
cover and unscrew the two captive screws that fasten
the display module. Disconnect the ribbon cable and
remove the display module. Signal connections are
made to a four-terminal connector in the base of the
enclosure. Grounding connections are made to the
two ground screws provided on the base
– one
internal and one external.
4-20 mA signal input positive
terminal connection
SIGNAL -
4-20 mA signal return/negative
terminal connection when not
using loop powered backlight.
BAC
+9-30 VDC when powering
backlight from external supply.
BACKLIGHT -
4-20 mA signal return/negative
terminal when using the
installed loop powered backlight
or ground/negative when
powering backlight from external
supply.
NPN open collector output
positive.
OUTPUT-
NPN open collector output
negative.
RESET +
Contact closure alarm
acknowledge pull up to 3 VDC.
RESET-
Contact closure alarm
acknowledge ground/negative.
for terminal positions.
•
Observe all safety regulations. Electrical wiring
should be performed in accordance with all
agency requirements and applicable national,
state, and local codes to prevent damage to the
meter and ensure personnel safety.
•
Static electricity can damage sensitive
components.
•
Observe safe handling precautions for
static-sensitive components.
•
Use proper grounding procedures/codes.
•
If the meter is installed in a high voltage
environment and a fault or installation error
occurs, high voltage may be present on any lead
or terminal.
Figure 3. Connector Board
SAFE-TOUCH
BUTTONS
BACKLIGHT
POWER
UNLOCK
LOCK
LOOP
9-36 VDC
+ - + -
SIGNAL
BACKLIGHT
+ - + -
OUTPUT
RESET
