This download contains current firmware for the SNAP-PAC-S1-W controller. Current firmware for all SNAP PAC brains and controllers is available in a single download here.

This file updates an OptoEMU Sensor (OPTOEMU-SNR-3V, OPTOEMU-SNR-DR1, or OPTOEMU-SNR-DR2) to use current firmware and software.

You must have OptoEMU Sensor Manager software in order to install this update file. For update instructions, see the Maintenance chapter in the OptoEMU Sensor User’s Guide (form 1932).

This download contains current firmware for the SNAP-PAC-S2 controller. Current firmware for all SNAP PAC brains and controllers is available in a single download here.

Important: Version R8.5e is NOT the latest-and-greatest.

R8.5 firmware may be needed when dealing with this potential issue:

KB82356 'File load failure: Memory allocate/flash' when updating SNAP-PAC-R1 firmware

1. Write down all settings that you have saved to flash, for example, security settings.

2. Important: Using the Operation Code in the Status Write area of the Web pages for the card, clear flash memory.

3. Now load the new firmware, following instructions in Opto 22 form #1156, the M4SENET-100 Installation Guide.

4. Using Telnet and following the steps in the M4SENET-100 Installation Guide dated June 2003 or newer, reset the settings you wrote down in step 1 and save them to flash.

If you did not clear flash memory (step 2), Telnet will not work with your card. In that case, you must reset the card to factory defaults and then assign an IP address to it before you can reset settings. Steps for resetting to factory defaults and assigning an IP address are in the M4SENET-100 Installation Guide.