DionexDX500-CPU045578-10Revision: 33 -S30 PC CardWithDX5-RLY 045580-03 Rev-13 -S37 The Dionex DX500-CPU is a 10BT Lan Board with DX5 Rly Assembly 045581. It is a conductivity detector panel card module.Have some marks and scratches due to old stock.© All the pictures are Organic and this part is physically in our stock