Precision Digital PD6820 - Manual (Page 13)

PD6820 Loop-Powered Process Meter Instruction Manual
13
Connections (continued)
SIGNAL +
4-20 mA signal input positive terminal connection
SIGNAL -
4-20 mA signal return/negative terminal connection when not
using loop powered backlight.
BACKLIGHT +
+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.
OUTPUT+
NPN open collector output positive.
OUTPUT-
NPN open collector output negative.
RESET +
Contact closure reset pullup to 3 VDC
RESET-
Contact closure reset ground/negative.
Refer to Figure 1 for terminal positions.
WARNING
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.
SAFE-TOUCH
BUTTONS
BACKLIGHT
POWER
UNLOCK LOCK LOOP 9-36 VDC
+ - + -
SIGNAL BACKLIGHT
+ - + -
OUTPUT RESET
Figure 1. Connector Board