ACX500 Alarm and Management Cable Specifications and Pinouts

Alarm Contact Port Pinouts for ACX500 Routers

You can independently configure alarm input ports (0 through 3) to operate in Normally Open or Normally Closed mode, and to trigger a red alarm condition or a yellow alarm condition, or to ignore alarm conditions.

You can independently configure alarm output ports (0 and 1) to relay alarm information when the system condition goes to a red or yellow alarm condition and when the alarm output port is configured to trigger based on alarm input condition. Alarm output ports (2 and 3) are used to indicate major and minor system alarms and are normally in open mode.

Table 1 shows the alarm contact connector pinouts.

Table 1: Alarm Contact Connector Pinouts

Pin Number	Signal Definition	Direction	CLI Port Mapping	Function
1	ALARM_IN0_NO/NC	Input	Input Alarm Port 0	External alarm input 0 (if voltage on this pin is between 24 V to 72 V with reference to Pin 6, alarm input 0 is in closed condition)
2	ALARM_IN1_REF	Input	Input Alarm Port 1	External alarm input 1 (Reference for Pin 7)
3	ALARM_IN2_NO/NC	Input	Input Alarm Port 2	External alarm input 2 (if voltage on this pin is between 24 V to 72 V with reference to Pin 8, alarm input 2 is in closed condition)
4	ALARM_IN3_NO/NC	Input	Input Alarm Port 3	External alarm input 3 (if voltage on this pin is between 24 V to 72 V with reference to Pin 8, alarm input 3 is in closed condition)
5	ALARM_OUT3_REF	Output	Reserved for Minor alarm	External alarm output 3 (this pin is connected to Pin 10 in closed condition)
6	ALARM_IN0_REF	Input	Input Alarm Port 0	External alarm input 0 (Reference for Pin 1)
7	ALARM_IN1_NO/NC	Input	Input Alarm Port 1	External alarm input 1 (if voltage on this pin is between 24 V to 72 V with reference to Pin 2, alarm input 1 is closed)
8	ALARM_IN2_IN3_REF	Input	Input Alarm Port 2 and Input Alarm Port 3	Common contact for external alarm input 3 and 4 (Reference for Pin 3 and Pin 4)
9	ALARM_OUT2_REF	Output	Reserved for Major alarm	External alarm output 2 (this pin is connected to Pin 15 in closed condition)
10	ALARM_OUT3_NO/NC	Output	Reserved for Minor alarm	External alarm output 3 (this pin is connected to Pin 5 in closed condition)
11	ALARM_OUT0_NO/NC	Output	Output Alarm Port 0	External alarm output 0 (this pin is connected to Pin 12 in closed condition)
12	ALARM_OUT0_REF	Output	Output Alarm Port 0	External alarm output 0 (this pin is connected to Pin 11 in closed condition)
13	ALARM_OUT1_NO/NC	Output	Output Alarm Port 1	External alarm output 1 (this pin is connected to Pin 14 in closed condition)
14	ALARM_OUT1_REF	Output	Output Alarm Port 1	External alarm output 1 (this pin is connected to Pin 13 in closed condition)
15	ALARM_OUT2_NO/NC	Output	Reserved for Major alarm	External alarm output 2 (this pin is connected to Pin 9 in closed condition)

Console Port Connector Pinout on ACX500 Routers

The port labeled CONSOLE on the front panel is an asynchronous serial interface that accepts an RJ-45 connector. Use a cable with the pinouts described in Table 2 to connect the Routing Engine to a console management device.

Note

You must use a shielded twisted pair (STP) cable for both outdoor and indoor router deployments.

Table 2: Connector Pinout for the Console Port

Pin	Signal	Description	CPU	Direction
1	RTS	Request to Send	Routing Engine	Out
2	NC	No Connect	–	–
3	TXD	Transmit Data	Routing Engine	Out
4	Ground	Signal Ground	–	–
5	Ground	Signal Ground	–	–
6	RXD	Receive Data	Routing Engine	In
7	NC	No Connect	–	–
8	CTS	Clear to Send	Routing Engine	In

Management Port Connector Pinout Information for ACX500 Routers

The management port—labeled MGMT—on an ACX Series router uses an RJ-45 connector to connect to a management device for out-of-band management.

The port uses an autosensing RJ-45 connector to support a 10/100/1000BASE-T connection. Two LEDs indicate link and /activity on the port and the administrative status of the port.

Table 3 provides the pinout information for the RJ-45 connector for the management port.

Table 3: Management Port Connector Pinout Information

Pin	Description	Direction
1	TRD[0]+	In/Out
2	TRD[0]-	In/Out
3	TRD[1]+	In/Out
4	TRD[2]+	In/Out
5	TRD[2]-	In/Out
6	Pin6 TRD[1]-	In/Out
7	TRD[3]+	In/Out
8	TRD[3]-	In/Out

USB Port Specifications for ACX500 Routers

The following Juniper Networks USB flash drives have been tested and are officially supported for the USB port on all ACX Series routers:

RE-USB-1G-S
RE-USB-2G-S
RE-USB-4G-S

Caution

Any USB memory product not listed as supported for ACX Series routers has not been tested by Juniper Networks. The use of any unsupported USB memory product could expose your ACX Series router to unpredictable behavior. Juniper Networks Technical Assistance Center (JTAC) can provide only limited support for issues related to unsupported hardware. We strongly recommend that you use only supported USB flash drives.

All USB flash drives used on ACX Series routers must have the following features:

USB 2.0 or later.
Formatted with a FAT or MS-DOS file system.

External Clocking Ports Specifications on ACX500 Routers

The external clocking port on the ACX500 router contains four SMB connectors that support 1 pulse-per-second (PPS) signal. These signals are internally isolated and have surge protection. Use a Molex 50-ohm SMB connector or equivalent (not provided) to connect to the external clocking ports.

ToD RS-422 and 1 PPS RS-422 Port Connector Pinout on ACX500 Routers

The port labeled TOD on the front panel is an asynchronous serial interface that accepts an RJ-45 connector (supports RS-422). Use a cable with the pinouts described in Table 4 to connect the Routing Engine to a console management device.

Table 4: Connector Pinout for the TOD RS-422 and 1 PPS RS-422 Ports

RJ-45 Pin	Signals	Description	Direction
1	Reserve	No Connect	–
2	Reserve	No Connect	–
3	1PPS_OUT-	Tx 1PPS negative	Out
4	GND	RS-422 level GND	–
5	GND	RS-422 level GND	–
6	1PPS_OUT+	Tx 1PPS positive	Out
7	TX-	Tx TOD Time message negative	Out
8	TX+	Tx TOD time message positive	OUT

ON THIS PAGE