Large Display Temperature Meters
Instruction Manual
23
Power Connections
!
When servicing the PD756 in a hazardous area, all appropriate
hazardous area procedures must be followed.
!
Refer to
Changing from 115 to 230 VAC Power
,
page 20 to make sure meter is
set up to accept proper voltage before applying power.
!
Disconnect power to the meter before making any connections.
!
Do not connect Power or Earth Ground to any unused or CM terminals.
Connecting 230 VAC with 115 VAC selected will result in damage to the
instrument as well as endanger personnel. Connecting AC power when meter is
set up for DC power will result in damage to the instrument as well as endanger
personnel.
Connect power to terminals L2(V-) and L1(V+) on screw terminal connector J2,
located near the transformer on the Main PCB. Connect Earth Ground to screw
terminal marked with Ground symbol located on enclosure’s base for PD756 and
757. Ground terminal for PD755 is located on J2 connector.
Figure 31 on page 61 for PD755
Figure 32 on page 62 for PD756
Figure 33 on page 62 for PD757
Figure 2.
Input Power Connections for 756 and 757
Notice:
•
Primary voltages must not be accessible to the user.
•
Primary wires must be installed in accordance to the applicable standards.
•
Keep the primary wires separated from signal cables.
