7705 SAR-M Connectors and LEDs (Variants with Module Slot, Actively Cooled)
150 7705 SAR-M Chassis Installation Guide
11 Mgmt Port Connector The Ethernet Management port has an RJ-45 connector and is used for 
the initial system startup as well as system configuration and monitoring. 
It supports both half-duplex and full-duplex modes and 10M/100M or 
autonegotiated communication.
Refer to Management Port for pinout assignments.
LEDs The Link LED is located in the top left corner of the port and the 
Act(ivity) LED is located in the top right corner.
Link Amber (blinking): Indicates that the Ethernet link has Rx/Tx activity
Unlit: Indicates that the Ethernet link has no activity, or is down or 
disabled
Act Green: Indicates that there is a valid communications link
Unlit: Indicates that there is no communications link, or that the link is 
operationally down, disabled, or shut down
Note: The Activity LED is not affected by a Lamp Test.
12 ToD Port Connector The ToD port has an RJ-45 connector and provides a mechanism to send 
out Time of Day/phase sync from the 7705 SAR-M, over IEEE 1588v2 
messaging. The ToD port includes a 1 pulse per second signal and an 
RS-422 serial link. This port is output only.
Refer to ToD Port for pinout assignments.
13 External 
Alarms
Connector The External Alarms port is a serial port that uses an HD-15 female 
connector. It can receive input signals from four external alarm devices 
and provide output signals through three sets of contacts. Refer to 
External Alarms Port for pinout assignments.
14 +BattA/
–BattA
+BattB/–BattB
Connector The power connector is a standard terminal block with dual power feeds 
for redundant DC supplies. For redundant AC power configurations, two 
AC power converters must be connected to the DC power feeds.
15 Batt A
Batt B
LEDs Green: Indicates that DC input power is present and operational
Unlit: Indicates that the DC power supply is not installed or the DC 
power feed is not connected
Note: The Batt A and Batt B LEDs are not affected by a Lamp Test.
16 Chassis 
Ground Stud
Threaded 
stud
The chassis ground stud allows a direct connection to the building ground 
for the chassis ground point.
Table 30: 7705 SAR-M Connector and LED Descriptions  (Continued)
Key Label/Part Sub-
category
Description