Industrial Automation Co. is NOT an Authorized Rockwell Distributor - we have our own unique inventory and sourcing relationships. Review our Reseller notice, here.

The 1771-DRS1 is a 1 MB static RAM SIMM chip specifically designed for use with Allen-Bradley control coprocessors, including the 1771-DMC series, offering compatibility with models such as 1771-DMC, 1771-DMC1, 1771-DMC4, and 1771-DXPS. Unlike standard RAM for personal computers, this specialized module ensures enhanced performance for industrial applications. Users considering installation in the second SIMM socket configured for battery backup should be aware of possible memory corruption during power cycles, particularly in older coprocessor models; upgrading or replacing with a newer model may be necessary. The 1771-DRS1, along with its compatible coprocessors, operates efficiently within a temperature range of 0 to 60 degrees Celsius and can be stored in temperatures as low as -40 up to 85 degrees Celsius.