920 Series: 

Fast and easy to install

Chain compensation

Plate of 3 relays (light load, heavy load, overload)

Unsymmetrical duplex serial communication bus (USDSC-BUS)

Digital programming via keyboard

710/720 Series:

Applying integrated construction and no-contact working mode

With self-return ability in empty load

Self-study or manual displacement setting way is applied

With analog voltage of 0~＋10V, ﹣10V~+10V