Precision Digital PD6820 - Manual (Page 16)

PD6820 Loop-Powered Process Meter Instruction Manual
16
Open Collector Output Connections
Output connections are made to two terminals labeled OUTPUT. Connect to an input
device such as alarm indicator or pulse counter as shown in Figure 6, or drive a relay
as shown in Figure 7.
To avoid damaging the PD6820’s amplifying components, use care not
to wire incorrectly or exceed output ratings. A diode, such as 1N4000
series, will provide protection from relay transients.
SAFE-TOUCH
BUTTONS
BACKLIGHT
POWER
UNLOCK LOCK LOOP 9-36 VDC
+ - + -
SIGNAL BACKLIGHT
+ - + -
OUTPUT RESET
+
Alarm Indicator/
Pulse Counter
(e.g. PD6300)
-
Figure 6. Connection to Device with Internal Pull-Up
SAFE-TOUCH
BUTTONS
BACKLIGHT
POWER
UNLOCK LOCK LOOP 9-36 VDC
+ - + -
SIGNAL BACKLIGHT
+ - + -
OUTPUT RESET
5-30 VDC
150 mA MAX
Figure 7. Output Connections