5
Chapter 3
Status Indicators and Back Panel Connections
3.1 Back Panel DC Power Connector
3.2 Front Panel Status Indicators
3.3 Remote Management DB25 Pin-Out for OPR300-24S
Pin Numbers
Description
I/O Direction
Logic High = 1
Logic Low = 0
Pin # 3
Power Supply Alarm
+RS485Output Alarm
NO-Alarm
Pin # 16
Power Supply Alarm
–RS485 Output
NO-Alarm
Alarm
Pin # 1
Frame Ground
Output
NA
NA
Pin # 7
Signal Ground
1
Output
NA
NA
3.4 Remote Management DB25 Pin-Out for OPR300-24R
Pin Numbers
Description
I/O Direction
Logic High = 1
Logic Low = 0
Pin # 3
Power Supply 1Alarm
+RS485 Output
Alarm
NO-Alarm
Pin # 16
Power Supply 1Alarm
–RS485 Output
NO-Alarm
Alarm
Pin # 9
Power Supply 2Alarm
–RS485 Output
NO-Alarm
Alarm
Pin # 17
Power Supply 2Alarm
+RS485 Output
Alarm
NO-Alarm
Pin # 1
Frame Ground
Output
NA
NA
Pin # 7
Signal Ground
1
Output
NA
NA
LED
Description (When Lit)
Labeled Indicators
Solid Green
Power Supply 1 Activated
Power 1
Solid Red
Power Supply Failure
PS 1 Alarm
Solid Green
Power Supply 2 Activated
Power 2
Solid Red
Power Supply Failure
PS 2 Alarm
+ Indicates 24V DC
– Indicates Ground Lin
e
WARNING: Observe
polarity when making
connection to the rear of
Model OPR300-24S /
Model OPR300-24R
Note 1: For proper remote management interface functionality. It is important to connect the signal ground properly
and securely.
