SEL-2241 Data Sheet
Schweitzer Engineering Laboratories, Inc.
2
Figure 3
Final Module Alignment
Connections
Communications Ports
NOTE:
Never connect two RTACs via USB to one PC.
All web access, settings changes, and ODBC connec-
tions use either the RTAC Ethernet ports or the front
USB type B port. Until you have configured the Ethernet
interfaces on the RTAC, you will need to use the supplied
USB type B cable to access the RTAC web interface. The
AC
SEL
ERATOR
RTAC installation will place the required
USB driver on your PC so that you can allow Windows
to install the driver automatically when it detects the
USB connection. Plug the USB cable into the RTAC and
into your PC. If you receive a prompt to connect to Win-
dows Update, select
No, not at this time
and press
Next
.
Then use the Windows Device Installation Wizard and
follow the automatic install prompts to install the SEL
USB driver.
After completing this step, you can use IP address
172.29.131.1 to access the RTAC web interface through
the USB cable. See
Section 7: Security and Account
Management
in the
AC
SEL
ERATOR
RTAC SEL-5033
Instruction Manual
for RTAC web password setup.
The SEL-2241 has four nonisolated serial ports. You can
select all RTAC serial ports through software to be either
EIA
-
232 or EIA
-
485/EIA
-
422. You can configure any
serial protocol on the RTAC to use any of these serial
ports. See
for the pinout of the RTAC serial ports.
Table 1
Nonisolated Female DB
-
9 Ports
EIA
-
232
EIA
-
485/EIA
-
422
Pin 1: N/C or +5 Vdc (also
DCD input on COM 1 if
+5 Vdc is disabled)
Pin 1: N/C or +5 Vdc (also
DCD input on COM 1 if
+5 Vdc is disabled)
Pin 2: RXD
Pin 2: -RXD
Pin 3: TXD
Pin 3: -TXD
Pin 4: +IRIG-B (DTR jumper
option for COM 1)
Pin 4: +IRIG-B
Pin 5: GND
Pin 5: GND
Pin 6: -IRIG-B (DSR jumper
option for COM 1)
Pin 6: –IRIG-B
Pin 7: RTS
Pin 7: +TXD
Pin 8: CTS
Pin 8: +RXD
Pin 9: GND
Pin 9: GND
Table 2
Port Characteristics
Port
Port Interface
Cables
USB B
USB Type B to USB
Type A
SEL-C664
ETH 1
and
ETH 2
10/100BASE-T (RJ45
for Copper)
SEL-C627
COM 1—COM 4 (serial)
EIA
-
232 (Nonisolated)
SEL-C234A,
SEL-273A, and
SEL-C387 are
popular selec-
tions
IRIG
-
B
IN
put
Female BNC
SEL-C953
IRIG
-
B
OUT
put
Female BNC
SEL-C953
