RFL Electronics IMUX 2000 - Figure 2-20. SAG Module Used in M-DACS

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
2.3.5 SAG MODULE
The SAG (SNMP Access Gateway) module allows a user to connect an M-DACS to a PC over an
ethernet network to program the M-DACS or to poll for status information using NMS. An overview
of SAG connections can be seen in Figure 2-20. The SAG has two serial ports, and one ethernet
10BaseT network port. Front panel LEDs provide status information about the ethernet connection,
serial port activity, and power status as shown in Figure 2-19 and Table 2-11.
The serial ports can operate from 300 to 19,200 baud, and are used to monitor serial data streams
and/or provide remote pass-through access to connected equipment. These serial ports are labeled
IMUX (I/O 1) and REMOTE (I/O 2). An alarm configuration file can be loaded into the SAG memory,
and the SAG can then monitor the data received on the serial ports for alarm conditions.
The serial ports may be used for pass-through access to connected serial devices, similar to a terminal
server. A TCP/IP connection is made to the SAG, and then characters received from the network
connection are passed to the serial port, and characters received on the serial port are passed to the
network connection. This pass-through mode may be used to remotely access the maintenance ports of
equipment.
When more than one connection is made to the SAG for access to the same pass-through port, then
users may be allowed to “join” connections. This feature can be useful in providing technical support in
the use of the connected equipment. Two remote users, at different locations, can both have access to
the same pass-through port. This allows a person providing technical support, to see what commands or
data is actually being sent and received, which can be quite useful when providing technical support.
Reset Button
Program Button
Network LED
Link Led
Network TX LED
Port 1 RX LED
Port 1 TX LED
Port 2 RX LED
Port 2 TX LED
Power LED
Figure 2-20. SAG module used in M-DACS
M-DACS-T1 RFL Electronics Inc.
October 16, 2012 2-39 (973) 334-3100