Model PD655 Large Display Process Meter
Instruction Manual
26
Enter, Acknowledgement, and Reset Total Connections
Enter, acknowledgement, and reset total terminals provide a convenient method
to remotely access the following functions:
Terminal Function
EN
Programs meter via the front panel menu
AK
Acknowledges or resets relays, exit menu
scroll
R
Resets total to zero
Hold reading switch
ACK switch
ENTER switch
Figure 11.
External Control Connections
Optional Relays & 4-20 mA Output Terminals
Depending on the model number, the Options Board may contain 2 or 4 relays
and an isolated 4-20 mA output transmitter. Relay connections are made to
removable screw terminal connectors located at J3 and J4 on the Option Board.
Connections for the isolated 4-20 mA output option are made to J1 on the
Options Board. Refer to Figure 4, page 22 for connectors’ location.
J1
J3
J4
PD475
PD476
PD474
PD477
PD478
Figure 12.
Relay and 4-20 mA Output Terminals
