HDL-MRS232U.431 Timer version Gateway for MAIR-Q/H.10 airkit RS232/RS485 Gateway Timer version for Airkit, it is adopted RS485 isolation technology, two modes: one is connected device to control HDL Buspro device from RS232, the other mode is connected device to control HDL BUS pro device from RS485. Also, you can control devices in RS232 or RS485 from HDL Buspro. Work with HDL-MAIR-Q/H.10 Airkit Air quality sensor Parameters Model HDL-MRS232U.431 Timer version SKU 319060031 Bus Power mA Width 72 mm Height 90 mm Depth 66 mm Weight 311 g Material CustomOne CustomTwo CustomThree CustomFour CustomFive Discount category A 2 pcs in stock in stock in stock You can buy these goods through registered HDL partner. Question to product Related products HDL-MAIR-Q/H.10 Air quality sensor, airkit