Sel SEL-2241 User manual

Schweitzer Engineering Laboratories, Inc. SEL-2241 Data Sheet
Each SEL Axion®system requires an RTAC module to serve as the system CPU. The SEL-2241 RTAC has all of the
communications and custom logic capabilities of the standalone RTAC modules, but is mounted in and receives power
from the Axion backplane.
Front-Panel
The following figure shows the RTAC status LEDs that
aid system troubleshooting and the connectors for com-
munications and wiring.
Figure 1 SEL-2241 RTAC Front Panel, Copper Ethernet
Mechanical Installation
Each SEL-2242 chassis/backplane has ten slots, labeled
Athrough J. Only Slot Asupports the SEL-2241 RTAC
module.
To install the RTAC, tip the top of the module away from
the chassis, align the notch on the bottom of the module
with Slot Aof the chassis, and place the module on the
bottom lip of the chassis as Figure 2 illustrates. The
module is aligned properly when it rests entirely on the
lip of the chassis.
Figure 2 Proper Module Placement
Next, carefully rotate the module into the chassis, mak-
ing sure that the alignment pin fits into the corresponding
slot at the top of the chassis (refer to Figure 3). Finally,
press the module firmly into the chassis and tighten the
chassis retaining screw.
SEL-2241 Real-Time Automation
Controller (RTAC)

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
ACSELERATOR 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 ACSELERATOR 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 Table 1 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-BINput Female BNC SEL-C953
IRIG-BOUTput Female BNC SEL-C953

Schweitzer Engineering Laboratories, Inc. SEL-2241 Data Sheet
3
Outputs
Refer to Specifications on page 5 for output contact rat-
ings and Figure 2 for terminal assignments. Configure
the contact output under SystemTags (Contact Outputs
Tab) in ACSELERATOR RTAC. You can change the name
of the point, create an alias tag name, and initialize status
values. The RTAC will use the initialized value until run
time, when it uses the actual value.
Figure 4 shows that a trip coil has a resistive and induc-
tive component. After a trip output has been closed for a
long time, the current settles to a steady-state value.
When the trip output opens, it tries to interrupt the induc-
tive current that wants to continue to flow (V = L di/dt).
This attempted interruption of current causes a large
voltage spike that can turn into an arc. When the contacts
bounce during the arc, they often weld closed. SEL has
designed, tested, and specified the outputs for this appli-
cation to prevent any such welding. See the Breaking
Capacity on page 6.
Figure 4 Inductive Interrupt of a Trip Output
LED Indicators
In addition to LEDs representing module status and com-
munications activity, the SEL-2241 has three user-pro-
grammable bi-color LEDs. Configure these LEDs under
SystemTags (LEDs Tab) in ACSELERATOR RTAC.
Field Serviceability
You can upgrade RTAC firmware and custom program-
ming in the field or remotely over Ethernet. Self-tests
provide status indication of errant conditions that can
occur in the RTAC. You can map one or a combination of
these or other status indications to the alarm contact to
create a diagnostic alarm.
Module Replacement
To replace the SEL-2241 RTAC, perform the following
steps.
Step 1. Back up all RTAC settings. See Section 1:
Getting Started in the SEL-5033 Instruction
Manual for instructions on how to back up and
restore RTAC projects.
Step 2. De-energize any power source connected to the
power coupler(s) in the Axion node.
Step 3. Loosen retaining screws and remove the
terminal strip for the alarm contact. Disconnect
all communications cables.
Step 4. Loosen the chassis retaining screw at the top of
the module.
Step 5. Tip the top of the module away from the chassis
and lift it from the bottom lip.
Step 6. Install the new module according to the
applicable mechanical installation instructions
in this section.
Step 7. Make all necessary connections to the module
according to the applicable connection
instructions in this section.
Step 8. Apply power to the Axion node.
Step 9. Use IP address 172.29.131.1 to access the RTAC
web interface through the supplied USB cable.
See Section 7: Security and Account
Management in the SEL-5033 Instruction
Manual for RTAC web password setup. Also
enable all necessary communications ports.
Step 10. Download the settings project from
ACSELERATOR RTAC.
Real-Time Clock Battery Replacement
The only field-replaceable component is the real-time
clock battery, which cannot be recharged. A lithium bat-
tery powers the clock (date and time) during loss or
removal of the external power source. The battery is a
3 V lithium coin cell, Rayovac no. BR1632 or equiva-
lent. At room temperature (25°C), the battery will oper-
ate nominally for ten years. When the device receives
power from an external source, the battery experiences a
low self-discharge rate. Thus, battery life can extend well
beyond ten years.
To replace the real-time clock battery, perform the fol-
lowing steps.
Step 1. Follow the SEL-2241 Disassembly instructions
to expose the circuit board.
Step 2. Locate the battery clip (holder) on the board.
Step 3. Carefully remove the battery from beneath the
clip. Properly dispose of the old battery.
125 Vdc

SEL-2241 Data Sheet Schweitzer Engineering Laboratories, Inc.
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Step 4. Install the new battery with the positive (+) side
facing up.
Step 5. Follow the SEL-2241 Reassembly instructions.
Step 6. Set the device date and time.
DANGER
Disconnect or de-energize all external connections before opening this
device. Contact with hazardous voltages and currents inside this device
can cause electrical shock resulting in injury or death.
CAUTION
The device contains devices sensitive to Electrostatic Discharge (ESD).
When working on the device with the front panel removed, work surfaces
and personnel must be properly grounded or equipment damage may result.
Jumpers
The SEL-2241 RTAC jumpers come preset and should
not be moved except as Section 3: Factory Reset in the
SEL-2240 Instruction Manual describes. Table 3 shows
the configurable jumper positions.
SEL-2241 Disassembly
To disassemble the SEL-2241 RTAC, perform the fol-
lowing steps.
Step 1. Follow the Module Replacement instructions.
Step 2. Remove the six retaining screws (two top, two
rear, two bottom).
Step 3. Place the module on its side and lift the cover to
expose the circuit board.
SEL-2241 Reassembly
To reassemble the SEL-2241 RTAC, perform the follow-
ing steps.
Step 1. Gently close the cover until the retaining screw
holes are aligned.
Step 2. Replace the six retaining screws.
Step 3. Follow the Mechanical Installation instructions.
Table 3 Configurable Jumper Positions
Jumper Position
JMP1 OPENa
aFactory-default position.
JMP2 OPENa
JMP3 OPENa
JMP4 1–2aRoutes IRIG-B+ to COM 1 Pin 4
3–4 Routes DTR signal to COM 1 Pin 4
5–6aRoutes IRIG-B ground to COM 1 Pin 6
7–8 Routes DSR signal to COM 1 Pin 6

Schweitzer Engineering Laboratories, Inc. SEL-2241 Data Sheet
5
Specifications
Compliance
Designed and manufactured under an ISO 9001 certified quality
management system
UL Listed to U.S. and Canadian safety standards (File E220228;
NRAQ, NRAQ7)
CE Mark
General
Operating Temperature Range
–40° to +85°C (–40° to +185°F)
Note: Not applicable to UL applications.
Operating Environment
Pollution Degree: 2
Overvoltage Category: II
Insulation Class: 1
Relative Humidity: 5%–95%, noncondensing
Maximum Altitude: 2000 m
Dimensions
Refer to Section 2: Installation in the SEL-2240 Instruction Manual for
relay dimensions.
Weight (Fully Populated Node)
7.26 kg (16 lb
CPU
Processing and Memory
Processor Speed: 533 MHz
Memory: 1024 MB DDR2 ECC RAM
Storage: 4 GB (2 GB reserved)
Security Features
Account Management: User Accounts
User Roles
LDAP Central Authentication
RADIUS Central Authentication
Strong Passwords
Inactive Account Logouts
Intrusion Detection: Access/Audit Logs
Alarm LED
Alarm Contact
Encrypted
Communication: SSL/TLS, SSH, HTTPS
Automation Features
Protocols
Client: DNP3 Serial, DNP3 LAN/WAN, Modbus
RTU, Modbus TCP, SEL ASCII, SEL
Fast Messaging, LG 8979, IEEE C37.118,
IEC 61850 MMS, CP2179, IEC 60870-5-
101/104, SNMP, CDC Type II, Courier,
IEC 60870-5-103, EtherNet/IP Explicit
Message Client
Server: DNP3 Serial, DNP3 LAN/WAN, Modbus
RTU, Modbus TCP, SEL Fast Messaging,
LG 8979, SES-92, IEEE C37.118,
IEC 61850 MMS, IEC 60870-5-101/104,
FTP, SFTP, CDC Type II, EtherNet/IP
Implicit Message Adapter
Peer-to-Peer: SEL MIRRORED BITS Communications,
IEC 61850 GOOSE, Network Global
Variables (NGVL)
Fieldbus: EtherCAT Client (in RTAC), EtherCAT
Server (I/O modules)
Engineering Access
Modes: SEL Interleaved, Direct
Port Server: Map Serial Ports to IP Ports
Secure Web Server: Diagnostic and Communications Data
Time-Code Input (Modulated IRIG-B)
Input Impedance: 2 k
Accuracy: 500 µs
Time-Code Input (Demodulated IRIG-B)
On (1) State: Vih > 2.2 V
Off (0) State: Vil < 0.8 V
Input Impedance: 2 k
Accuracy: 500 ns
Time-Code Output (IRIG-B)
On (1) State: Voh > 2.4 V
Off (0) State: Vol < 0.8 V
Load: 50 
Network Time Protocol (NTP) Modes
NTP Client: As many as three configurable servers
NTP Server
Precise Time Protocol (PTP)
PTP Client: Peer delay request and end-to-end path
delay supported
Communications Ports
Ethernet Ports (To Backplane)
Ports: 1
Data Rate: Automatic
Protocols: Dedicated EtherCAT port
Ethernet Ports (Terminal Side)
Ports: 2
Data Rate: 10 or 100 Mbps
Connector: RJ45 Female or LC Fiber Single-Mode or
Multimode (100 Mbps only)
Fiber-Optic Ports (Class 1 LASER/LED)
Wavelength: 1300 nm
Optical Connector Type: LC
Multimode Option
Link Budget: 11 dB
Min. TX Power: –20 dBm
Min. RX Sensitivity: –31 dBm
Fiber Size: 50–200 µm
Approximate Range: 2 km

SEL-2241 Data Sheet Schweitzer Engineering Laboratories, Inc.
6
Data Rate: 100 Mbps
Typical Fiber
Attenuation: –2 dB/km
Single-Mode Option
Link Budget: 10 dB
Min. TX Power: –15 dBm
Min. RX Sensitivity: –25 dBm
Fiber Size: 9 µm
Approximate Range: 15 km
Data Rate: 100 Mbps
Typical Fiber
Attenuation: –0.4 dB/km
Serial Ports
Ports: 4
Types: EIA-232/EIA-485 (software selectable)
Data Rate: 300 to 115200 bps
Connector: DB-9 Female
Time Synchronization: IRIG-B
Power: +5 Vdc power on Pin 1
(500 mA maximum)
USB Ports
Device Ports: 1 Type B
Output Contact
Mechanical Durability: 10 M no-load operations
DC Output Ratings
Rated Operational
Voltage: 250 Vdc
Rated Voltage Range: 19.2–275 Vdc
Rated Insulation Voltage: 300 Vdc
Make: 30 A @ 250 Vdc per IEEE C37.90
Continuous Carry: 6 A @ 70°C; 4 A @ 85°C
Thermal: 50 A for 1 s
Contact Protection: 360 Vdc, 40 J MOV
Operating Time (coil
energization to contact
closure, resistive load): Pickup/Dropout time 8 ms typical
Breaking Capacity
(10,000 operations) per
IEC 60255-0-20:1974:
24 Vdc 0.75 A L/R = 40 ms
48 Vdc 0.50 A L/R = 40 ms
125 Vdc 0.30 A L/R = 40 ms
250 Vdc 0.20 A L/R = 40 ms
Cyclic Capacity
(2.5 cycles/second) per
IEC 60255-0-20:1974:
24 Vdc 0.75 A L/R = 40 ms
48 Vdc 0.50 A L/R = 40 ms
125 Vdc 0.30 A L/R = 40 ms
250 Vdc 0.20 A L/R = 40 ms
AC Output Ratings
Rated Operational
Voltage: 240 Vac
Rated Insulation Voltage: 300 Vac
Utilization Category: AC-15 (control of electromagnetic
loads > 72 VA)
Contact Rating
Designation:
B300 (B = 5 A, 300 = rated insulation
voltage)
Contact Protection: 270 Vac, 40 J
Continuous Carry: 3 A @ 120 Vac
1.5 A @ 240 Vac
Conventional Enclosed
Thermal Current (Ithe)
Rating: 5 A
Rated Frequency: 50/60 ± 5 Hz
Operating Time (coil
energization to contact
closure, resistive load): Pickup/Dropout time < 8 ms typical
Electrical Durability
Make VA Rating: 3600 VA, cosø = 0.3
Electrical Durability
Break VA Rating: 360 VA, cosø = 0.3
Type Tests
Environmental Tests
Enclosure Protection: IEC 60529:2001 + CRGD:2003
IP3X excluding the terminal blocks
Vibration Resistance: IEC 60255-21-1:1988
Vibration Endurance, Severity: Class 2
Vibration Response, Severity: Class 1
Shock Resistance: IEC 60255-21-2:1988
Bump Test, Severity: Class 1
Shock Withstand, Severity: Class 1
Shock Response, Severity: Class 1
Seismic: IEC 60255-21-3:1993
Quake Response, Severity: Class 1
Cold: IEC 60068-2-1:2007
–40°C, 16 hours
Dry Heat: IEC 60068-2-2:2007
+85°C, 16 hours
Damp Heat, Cyclic: IEC 60068-2-30:2005
25°C to 55°C, 6 cycles,
95% relative humidity
Dielectric Strength and Impulse Tests
Impulse: IEC 60255-5:2000
Severity Level: 0.5 J, 5 kV contact
outputs; 0.5 J, 2 kV IRIG-B IN; 0.5 J,
1.5 kV Ethernet ports
IEEE C37.90:2005
Severity Level: 0.5 J, 5 kV contact
outputs; 0.5 J, 2 kV IRIG-B IN; 0.5 J,
1.5 kV Ethernet ports
Dielectric (HiPot): IEC 60255-5:2000
Severity Level: 2 kVac on contact output
for 1 minute; 2 kVdc on IRIG-B IN and
Ethernet ports for 1 minute
IEEE C37.90:2005
Severity Level: 2 kVac on contact output
for 1 minute; 2 kVdc on IRIG-B IN and
Ethernet ports for 1 minute
Insulation: IEC 60255-5:2000
Severity Level: 500 V for greater than
1 minute
RFI and Interference Tests
EMC Immunity
Electrostatic Discharge
Immunity:
IEEE C37.90.3:2001
IEC 60255-22-2:2008
IEC 61000-4-2:2008
Severity Level 4
8 kV contact discharge
15 kV air discharge
Radiated RF Immunity: IEEE C37.90.2:2004
Severity Level: 35 V/m
IEC 61000-4-3:2008
Severity Level: 10 V/m
IEC 60255-22-3:2007
Severity Level: 10 V/m

Schweitzer Engineering Laboratories, Inc. SEL-2241 Data Sheet
7
Digital Radio Telephone
RF Immunity:
ENV 50204:1995 Severity Level: 10 V/m
at 900 MHz and 1.89 GHz
Conducted RF Immunity: IEC 60255-22-6:2001
Severity Level: 10 Vrms
IEC 61000-4-6:2008
Severity Level: 10 Vrms
Surge Immunity: IEC 60255-22-5:2008
Severity Level: 1 kV Line to Line,
2 kV Line to Earth
IEC 61000-4-5:2005
Severity Level: 1 kV Line to Line,
2 kV Line to Earth
Fast Transient, Burst
Immunity:
IEC 60255-22-4:2008
Severity Level: Class A: 4 kV, 5 kHz;
2 kV, 5 kHz on communications ports
IEC 61000-4-4:2004 + CRGD:2006
Severity Level: 4 kV, 5 kHz
Power Supply Immunity: IEC 61000-4-11:2004
IEC 61000-4-29:2000
IEC 60255-11:2008
Magnetic Field
Immunity:
IEC 61000-4-8:2009
Severity Level: 1000 A/m for 3 seconds,
100 A/m for 1 minute
IEC 61000-4-10:2001
Severity Level: 100 A/m
Surge Withstand
Capability Immunity:
IEEE C37.90.1:2002,
2.5 kV oscillatory, 4 kV fast transient
IEC 60255-22-1:2007
2.5 kV common-mode
1.0 kV differential-mode
Oscillatory Waves
Immunity:
IEC 61000-4-12:2006
Ring Wave: 2 kV common,
1.0 kV differential
Oscillatory: 2.5 kV common,
1.0 kV differential
Common Mode
Disturbance Immunity:
IEC 61000-4-16:2002
Frequency: 0 Hz to 150 Hz
Severity: Level 4, segment 4: 30 Vrms
open-circuit, 15–150 kHz
Emissions
Radiated and Conducted
Emissions:
IEC 60255-25:2000
FCC 15-107:2014
FCC 15-109:2014
Severity Level: Class A
Canada ICES-001 (A) / NMB-001 (A)

8
© 2011—2021 by Schweitzer Engineering Laboratories, Inc. All rights reserved.
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trademark of their respective holders. No SEL trademarks may be used without written
permission. SEL products appearing in this document may be covered by U.S. and Foreign
patents.
Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under
federal and international copyright and patent laws in its products, including without lim-
itation software, firmware, and documentation.
The information in this document is provided for informational use only and is subject to
change without notice. Schweitzer Engineering Laboratories, Inc. has approved only the
English language document.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit
selinc.com or contact your customer service representative.
EtherCAT®is registered trademark and patented technology, licensed by Beckhoff
Automation GmbH, Germany.
*PDS2241-01*
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SEL-2241 Data Sheet Date Code 20211105