In most cases, all the DL750 modules will be compatible with the DL850 and SL1000.
However, there are some module which can be used with DL750 but cannot be used with DL850. These are typically the early DL750 modules that were released with the DL850. The boot up procedure of the DL850 will confirm the serial number and FPGA number of the module. There are a few DL750 modules that were designed to not be FPGA interchangeable. If you have any questions on whether your module is compatible with the DL850 or SL1000, please contact your nearest Yokogawa representative with your module's serial number.