Battery; Ethernet Communications Ports - CTI 2500P-J Series Installation And Operation Manual

2.3 Battery

A replaceable high-power Lithium Metal Oxide battery provides an auxiliary power source to provide an orderly
system shutdown when DC power from the backplane is lost while the controller is in RUN state. The battery is
accessible through the front panel battery cover and can be replaced while the application is running.
The battery circuit is automatically enabled when the backplane power is removed. After a successful shutdown,
the battery circuit is disabled to preserve battery life. See
regarding battery installation and care.

2.4 Ethernet Communications Ports

The RJ-45 Ethernet ports, labeled P
Each port is capable of operating at 1000Mb (1Gb) full duplex. If connected to a device that does not support 1Gb
data rates, a port will auto-negotiate a slower speed (10Mb or 100Mb) with the device. All ports can be used for
multiple purposes, such as programming and monitoring, data communications with SCADA workstations and
other devices, and Ethernet I/O. Duplicate IP Address detection, broadcast/multicast storm protection and traffic
rate limiting are enabled for each port.
By default, Ethernet frames arriving at a port are forwarded only to the controller microprocessor. Ethernet frames
are not forwarded between the ports, preventing the accidental creation of loops. If ports are connected to
different networks, this behavior prevents traffic on a network from entering the other networks. To allow for
special situations, forwarding between ports can be enabled in the web server C
page. See Section 4.2.3 Internal Ethernet Switch
Each Ethernet port connector contains two embedded LEDs. The L
port is successfully connected to another Ethernet device, such as a network switch. The A
provides visual indication that Ethernet packets are being received or transmitted via the port. See the following
table below for details.
LED
Link
Act
(Activity)
14
A, P B, P
ORT ORT
State Indication
Off Ethernet link is not available.
On Ethernet link is available.
Off No Ethernet frames are being transmitted on the network to
which the port is connected.
On Ethernet frames are being transmitted on the network to
(Blinking) which the port is connected
Section 3.2.4: Inserting the Battery
C, P D, are identical in their operation and usage.
ORT AND ORT
Configuration.
LED (top) indicates whether the Ethernet
INK
CTI Janus Programmable Automation Controller IOG
for instructions
/N S
ONFIGURATION ETWORK
LED (bottom)
CTIVITY
ETTINGS