Precision Digital PD6800 - Manual (Page 14)

PD6800-0L1 Loop-Powered Process Meter Instruction Manual
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Figure 4. Connections with Externally-Powered Backlight
It is possible to use the same transmitter (signal loop) power supply for the externally
powered backlight. The backlight circuit will draw 25 mA in addition to the loop circuit.
External Acknowledge Connection
External acknowledge connections are made to two terminals labeled RESET. Connect
to a contact closure source such as a relay or a pushbutton as shown in
Figure 5.
Figure 5. External Alarm Reset/Acknowledge Connections
SAFE-TOUCH
BUTTONS
BACKLIGHT
POWER
UNLOCK LOCK LOOP 9-36 VDC
+ - + -
SIGNAL BACKLIGHT
+ - + -
OUTPUT RESET