8
2.6 Network Communication Interfaces
2.6.1 10Base-T RJ-45 Pinout
The 10BASE-T Ethernet network
(RJ45) system is used in the iServer
for network connectivity. The 10 Mbps
twisted-pair Ethernet system operates
over two pairs of wires. One pair is
used for receiving data signals and
the other pair is used for transmitting
data signals. This means that four
pins of the eight-pin connector are
used.
2.6.2 10Base-T Crossover Wiring
When connecting the iServer directly to the
computer’s network port, the transmit data pins of the
computer should be wired to the receive data pins of
the iServer, and vice versa. The 10Base-T crossover
cable with pin connection assignments are shown
below.
Use straight through cable for connecting the
iServer to an Ethernet hub. The ports on the
hub are already crossed.
2.7 Relay Wiring Connections
To access the Relay Connector you must remove
the cover, refer to Section 2.4.
It is recommended that you ground your unit
by connecting a wire to the Ground/Return
position of the relay connector. Or by
wrapping a wire around the mounting tab
screw (on older units) and tightening a lock
washer so that it embeds itself into the
metal of the mounting tab.
2.8 Running on Battery Power
Battery and S5 jumper installed:
if there is a power
outage the iServer board will be fully functional including the Ethernet and LCD backlight
“ON” for approximately 1 hour.
You need to make sure that the LCD/PWR field on the Configuration page of the iServer
is set to UPS (see Section 4.3.5.A)
Battery installed and S5 jumper in storage position (Factory Default of S5): if there is a
power outage the LCD Backlight and Ethernet will not run, but the unit will be collecting
and storing data for approximately 10 days.
When you first connect the battery, without the AC power adaptor, the unit will be in
“Sleep Mode”, in order to save power, and the LCD will display “Flash Standby”
(provided that S5 jumper is not installed). When battery is installed, plug the AC adaptor
into unit and push the Flash Reset Button (refer to Figure 2.4 or Figure 2.5). Unit is now
ready to be configured for recording the data. Also, if the AC adaptor is unplugged
623451
NO1
NO2
9 Vdc
RTN
COM2
COM1
RELAY 2 RELAY 1
Figure 2.8 Relay Connections
Figure 2.7 10Base-T
Crossover Cable Wiring
Pin Name Description
1 +Tx + Transmit Data
2 -Tx - Transmit Data
3 +RX + Receive Data
4 N/C Not Connected
5 N/C Not Connected
6 -Rx - Receive Data
7 N/C Not Connected
8 N/C Not Connected
Figure 2.6 RJ45 Pinout
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