Their earlier 100-series SEL-2407 clock uses the Trimble 12-channel Larsen iQ GPS receiver (46240-20, Pb part), or the RoHs compliant part (46240-25). These 100-series Clocks will experience WNRO during 2024.

I obtained a Schweitzer Engineering Labs SEL-2407 Clock (100 series, 2005 mfg. date) in early February 2023, from a Rocky Mountain salvage company (paid far less than their asking price). They were unaware of a potential WNRO issue with this clock.
My purchase was a “Leap of Faith”.

Fortunately, SEL has update path for their older (100-series) SEL-2407 clock to address WNRO.

I successfully performed these update steps, earlier this month, to address the WNRO issue.
Schweitzer Engineering provided the support (manual and firmware files) that I needed.
Since SEL serves the electrical power utility industry (post 9/11), their support take security pre-cautions (they are NOT structured for hobbyist support).
I performed my own research to find the correct Euro Terminal Plug (power), which was missing.

The SEL upgrade path requires a firmware upgrade (Trimble iQ to version 1.16) and a micro-code upgrade (internal FPGA to version 1.05) before 2024 (unit’s WNRO date).
IF the SEL-2407 clock is running the original v1.04 Trimble firmware,
THEN an intermediate firmware upgrade to v1.05 is required before upgrading to v1.16.

IF you acquire one of these older SEL-2407 clocks and desire to perform this upgrade,
here are the REQUIRED Documents, Cables, Hardware, and HEX firmware files.

1.) SEL-2407 Satellite-Synchronized Clock Instruction Manual (October 22, 2022 version, PDF, 41 pages). SEL-2407 Manual lists Specific Steps (page 35) to upgrade both GPS receiver and FPGA firmware.

2.) SEL C234A Specific Serial (RS-232) Cable required to connect SEL-2407 (DTE) to Personal Computer (DTE). You will likely have to DIY Build this Null modem cable with proper CTS/RTS wiring. Your personal computer needs a serial terminal program with XMODEM capabilities, to access the SEL-2407 Clock. The PC serial port needs to support 115.2K (FPGA file is Large, 7.6MB).

3.) The SEL-2407 uses a 6-position Euro terminal for Power and Alarm. My unit was missing this Euro plug (Euro Terminal Block Plug, Green, 6-position, Straight, 7.62mm Pitch) as well as adjacent Green Ground Screw (Green, Hex Washer Slot machine screw, 6-32, 3/8” length).

PHOENIX CONTACT (Germany), Part Number: 1875140. Mouser and Digi-Key stock this Euro terminal block plug. ~ $20 each. My hardware drawer had 6-32 Hex Washer Slot Screw, and Testors GREEN Paint.

4.) Acquire Three (3) HEX firmware files (Receiver, FPGA) to perform this upgrade.

5.) Now you can begin the update process.
—
Connect C234A serial cable and GPS Antenna (TNC connector) to the SEL-2407.

Assure SEL-2407 is DISCONNECTED from Power.
SEL-2407 has an internal SMPS and DC-DC converter. Some steps during Upgrade Steps require Opening the Unit (Protection jumper for FPGA programming). DE-Energize SEL-2407 for serring the DIP switches !!

Go to Pages 8-11, Set the DIP Switches (front panel removal) for your Location and DST rules.

Attach SEL-2407 Clock to Power Source and Power ON.

Once the SEL-2407 has a Satellite Lock, use your computer to talk to the SEL-2407.
Commands are found on Pages 12-23 of the manual.

“STA” is the Status command, Page 21-22, displays Firmware and Status of your Clock.

Pages 32-39 cover the Steps for Upgrading the SEL-2407.
Have the HEX files in an accessible directory on your computer.

NOT Recommended for NOVICES or APPLIANCE OPERATORS.
Previous experience with upgrading embedded hardware & router firmware useful.
—
I can provide current SEL-2407 clock manual to an appropriate time-nuts repository.

Greg, w9gb
chicago

Schweitzer Engineering Labs SEL-2407 Satellite Synchronized Clock https://selinc.com/api/download/2909/?lang=en There is NO GPS Disciplined Oscillator (GPSDO) with this Clock. It distributes IRIG-B time codes. 1 PPS is an optional output from the clock. Newest version (300-series) costs $1,600 USD. Their earlier 100-series SEL-2407 clock uses the Trimble 12-channel Larsen iQ GPS receiver (46240-20, Pb part), or the RoHs compliant part (46240-25). These 100-series Clocks will experience WNRO during 2024. == I obtained a Schweitzer Engineering Labs SEL-2407 Clock (100 series, 2005 mfg. date) in early February 2023, from a Rocky Mountain salvage company (paid far less than their asking price). They were unaware of a potential WNRO issue with this clock. My purchase was a “Leap of Faith”. Fortunately, SEL has update path for their older (100-series) SEL-2407 clock to address WNRO. I successfully performed these update steps, earlier this month, to address the WNRO issue. Schweitzer Engineering provided the support (manual and firmware files) that I needed. Since SEL serves the electrical power utility industry (post 9/11), their support take security pre-cautions (they are NOT structured for hobbyist support). I performed my own research to find the correct Euro Terminal Plug (power), which was missing. The SEL upgrade path requires a firmware upgrade (Trimble iQ to version 1.16) and a micro-code upgrade (internal FPGA to version 1.05) before 2024 (unit’s WNRO date). IF the SEL-2407 clock is running the original v1.04 Trimble firmware, THEN an intermediate firmware upgrade to v1.05 is required before upgrading to v1.16. == IF you acquire one of these older SEL-2407 clocks and desire to perform this upgrade, here are the REQUIRED Documents, Cables, Hardware, and HEX firmware files. 1.) SEL-2407 Satellite-Synchronized Clock Instruction Manual (October 22, 2022 version, PDF, 41 pages). SEL-2407 Manual lists Specific Steps (page 35) to upgrade both GPS receiver and FPGA firmware. 2.) SEL C234A Specific Serial (RS-232) Cable required to connect SEL-2407 (DTE) to Personal Computer (DTE). You will likely have to DIY Build this Null modem cable with proper CTS/RTS wiring. Your personal computer needs a serial terminal program with XMODEM capabilities, to access the SEL-2407 Clock. The PC serial port needs to support 115.2K (FPGA file is Large, 7.6MB). 3.) The SEL-2407 uses a 6-position Euro terminal for Power and Alarm. My unit was missing this Euro plug (Euro Terminal Block Plug, Green, 6-position, Straight, 7.62mm Pitch) as well as adjacent Green Ground Screw (Green, Hex Washer Slot machine screw, 6-32, 3/8” length). PHOENIX CONTACT (Germany), Part Number: 1875140. Mouser and Digi-Key stock this Euro terminal block plug. ~ $20 each. My hardware drawer had 6-32 Hex Washer Slot Screw, and Testors GREEN Paint. 4.) Acquire Three (3) HEX firmware files (Receiver, FPGA) to perform this upgrade. 5.) Now you can begin the update process. — Connect C234A serial cable and GPS Antenna (TNC connector) to the SEL-2407. Assure SEL-2407 is DISCONNECTED from Power. SEL-2407 has an internal SMPS and DC-DC converter. Some steps during Upgrade Steps require Opening the Unit (Protection jumper for FPGA programming). DE-Energize SEL-2407 for serring the DIP switches !! Go to Pages 8-11, Set the DIP Switches (front panel removal) for your Location and DST rules. Attach SEL-2407 Clock to Power Source and Power ON. Once the SEL-2407 has a Satellite Lock, use your computer to talk to the SEL-2407. Commands are found on Pages 12-23 of the manual. “STA” is the Status command, Page 21-22, displays Firmware and Status of your Clock. Pages 32-39 cover the Steps for Upgrading the SEL-2407. Have the HEX files in an accessible directory on your computer. NOT Recommended for NOVICES or APPLIANCE OPERATORS. Previous experience with upgrading embedded hardware & router firmware useful. — I can provide current SEL-2407 clock manual to an appropriate time-nuts repository. == Greg, w9gb chicago

Lynn Grant

Wed, Mar 15, 2023 10:46 PM

Lynn, N8AF/V31LK

On Wed, Mar 15, 2023 at 4:22 PM Gregory Beat via time-nuts <
time-nuts@lists.febo.com> wrote:

Their earlier 100-series SEL-2407 clock uses the Trimble 12-channel Larsen
iQ GPS receiver (46240-20, Pb part), or the RoHs compliant part (46240-25).
These 100-series Clocks will experience WNRO during 2024.

I obtained a Schweitzer Engineering Labs SEL-2407 Clock (100 series, 2005
mfg. date) in early February 2023, from a Rocky Mountain salvage company
(paid far less than their asking price). They were unaware of a potential
WNRO issue with this clock.
My purchase was a “Leap of Faith”.

Fortunately, SEL has update path for their older (100-series) SEL-2407
clock to address WNRO.

I successfully performed these update steps, earlier this month, to
address the WNRO issue.
Schweitzer Engineering provided the support (manual and firmware files)
that I needed.
Since SEL serves the electrical power utility industry (post 9/11), their
support take security pre-cautions (they are NOT structured for hobbyist
support).
I performed my own research to find the correct Euro Terminal Plug
(power), which was missing.

The SEL upgrade path requires a firmware upgrade (Trimble iQ to version
1.16) and a micro-code upgrade (internal FPGA to version 1.05) before 2024
(unit’s WNRO date).
IF the SEL-2407 clock is running the original v1.04 Trimble firmware,
THEN an intermediate firmware upgrade to v1.05 is required before
upgrading to v1.16.

IF you acquire one of these older SEL-2407 clocks and desire to perform
this upgrade,
here are the REQUIRED Documents, Cables, Hardware, and HEX firmware files.

1.) SEL-2407 Satellite-Synchronized Clock Instruction Manual (October
22, 2022 version, PDF, 41 pages). SEL-2407 Manual lists Specific Steps
(page 35) to upgrade both GPS receiver and FPGA firmware.

2.) SEL C234A Specific Serial (RS-232) Cable required to connect
SEL-2407 (DTE) to Personal Computer (DTE). You will likely have to DIY
Build this Null modem cable with proper CTS/RTS wiring. Your personal
computer needs a serial terminal program with XMODEM capabilities, to
access the SEL-2407 Clock. The PC serial port needs to support 115.2K
(FPGA file is Large, 7.6MB).

3.) The SEL-2407 uses a 6-position Euro terminal for Power and Alarm.
My unit was missing this Euro plug (Euro Terminal Block Plug, Green,
6-position, Straight, 7.62mm Pitch) as well as adjacent Green Ground Screw
(Green, Hex Washer Slot machine screw, 6-32, 3/8” length).

PHOENIX CONTACT (Germany), Part Number: 1875140. Mouser and Digi-Key stock
this Euro terminal block plug. ~ $20 each. My hardware drawer had 6-32 Hex
Washer Slot Screw, and Testors GREEN Paint.

4.) Acquire Three (3) HEX firmware files (Receiver, FPGA) to perform
this upgrade.

5.) Now you can begin the update process.
—
Connect C234A serial cable and GPS Antenna (TNC connector) to the SEL-2407.

Assure SEL-2407 is DISCONNECTED from Power.
SEL-2407 has an internal SMPS and DC-DC converter. Some steps during
Upgrade Steps require Opening the Unit (Protection jumper for FPGA
programming). DE-Energize SEL-2407 for serring the DIP switches !!

Go to Pages 8-11, Set the DIP Switches (front panel removal) for your
Location and DST rules.

Attach SEL-2407 Clock to Power Source and Power ON.

Once the SEL-2407 has a Satellite Lock, use your computer to talk to the
SEL-2407.
Commands are found on Pages 12-23 of the manual.

“STA” is the Status command, Page 21-22, displays Firmware and Status of
your Clock.

Pages 32-39 cover the Steps for Upgrading the SEL-2407.
Have the HEX files in an accessible directory on your computer.

NOT Recommended for NOVICES or APPLIANCE OPERATORS.
Previous experience with upgrading embedded hardware & router firmware
useful.
—
I can provide current SEL-2407 clock manual to an appropriate time-nuts
repository.

Greg, w9gb
chicago

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com

It looks like the SEL-2407, like the SEL-2401, requires a terminal emulator that can do XMODEM transfers. My go to emulator, Putty, could not handle that, so I got ZOC, by Emtec (https://www.emtec.com/zoc/), and it worked like a champ. If anyone else needs to acquire a new terminal emulator to do the firmware uploads, I highly recommend ZOC. Lynn, N8AF/V31LK On Wed, Mar 15, 2023 at 4:22 PM Gregory Beat via time-nuts < time-nuts@lists.febo.com> wrote: > Schweitzer Engineering Labs SEL-2407 Satellite Synchronized Clock > https://selinc.com/api/download/2909/?lang=en > There is NO GPS Disciplined Oscillator (GPSDO) with this Clock. It > distributes IRIG-B time codes. > 1 PPS is an optional output from the clock. Newest version (300-series) > costs $1,600 USD. > > Their earlier 100-series SEL-2407 clock uses the Trimble 12-channel Larsen > iQ GPS receiver (46240-20, Pb part), or the RoHs compliant part (46240-25). > These 100-series Clocks will experience WNRO during 2024. > == > I obtained a Schweitzer Engineering Labs SEL-2407 Clock (100 series, 2005 > mfg. date) in early February 2023, from a Rocky Mountain salvage company > (paid far less than their asking price). They were unaware of a potential > WNRO issue with this clock. > My purchase was a “Leap of Faith”. > > Fortunately, SEL has update path for their older (100-series) SEL-2407 > clock to address WNRO. > > I successfully performed these update steps, earlier this month, to > address the WNRO issue. > Schweitzer Engineering provided the support (manual and firmware files) > that I needed. > Since SEL serves the electrical power utility industry (post 9/11), their > support take security pre-cautions (they are NOT structured for hobbyist > support). > I performed my own research to find the correct Euro Terminal Plug > (power), which was missing. > > The SEL upgrade path requires a firmware upgrade (Trimble iQ to version > 1.16) and a micro-code upgrade (internal FPGA to version 1.05) before 2024 > (unit’s WNRO date). > IF the SEL-2407 clock is running the original v1.04 Trimble firmware, > THEN an intermediate firmware upgrade to v1.05 is required before > upgrading to v1.16. > == > IF you acquire one of these older SEL-2407 clocks and desire to perform > this upgrade, > here are the REQUIRED Documents, Cables, Hardware, and HEX firmware files. > > 1.) SEL-2407 Satellite-Synchronized Clock Instruction Manual (October > 22, 2022 version, PDF, 41 pages). SEL-2407 Manual lists Specific Steps > (page 35) to upgrade both GPS receiver and FPGA firmware. > > 2.) SEL C234A Specific Serial (RS-232) Cable required to connect > SEL-2407 (DTE) to Personal Computer (DTE). You will likely have to DIY > Build this Null modem cable with proper CTS/RTS wiring. Your personal > computer needs a serial terminal program with XMODEM capabilities, to > access the SEL-2407 Clock. The PC serial port needs to support 115.2K > (FPGA file is Large, 7.6MB). > > 3.) The SEL-2407 uses a 6-position Euro terminal for Power and Alarm. > My unit was missing this Euro plug (Euro Terminal Block Plug, Green, > 6-position, Straight, 7.62mm Pitch) as well as adjacent Green Ground Screw > (Green, Hex Washer Slot machine screw, 6-32, 3/8” length). > > PHOENIX CONTACT (Germany), Part Number: 1875140. Mouser and Digi-Key stock > this Euro terminal block plug. ~ $20 each. My hardware drawer had 6-32 Hex > Washer Slot Screw, and Testors GREEN Paint. > > 4.) Acquire Three (3) HEX firmware files (Receiver, FPGA) to perform > this upgrade. > > 5.) Now you can begin the update process. > — > Connect C234A serial cable and GPS Antenna (TNC connector) to the SEL-2407. > > Assure SEL-2407 is DISCONNECTED from Power. > SEL-2407 has an internal SMPS and DC-DC converter. Some steps during > Upgrade Steps require Opening the Unit (Protection jumper for FPGA > programming). DE-Energize SEL-2407 for serring the DIP switches !! > > Go to Pages 8-11, Set the DIP Switches (front panel removal) for your > Location and DST rules. > > Attach SEL-2407 Clock to Power Source and Power ON. > > Once the SEL-2407 has a Satellite Lock, use your computer to talk to the > SEL-2407. > Commands are found on Pages 12-23 of the manual. > > “STA” is the Status command, Page 21-22, displays Firmware and Status of > your Clock. > > Pages 32-39 cover the Steps for Upgrading the SEL-2407. > Have the HEX files in an accessible directory on your computer. > > NOT Recommended for NOVICES or APPLIANCE OPERATORS. > Previous experience with upgrading embedded hardware & router firmware > useful. > — > I can provide current SEL-2407 clock manual to an appropriate time-nuts > repository. > == > > Greg, w9gb > chicago > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com