This Harmony RSL bus jumper with 20-poles is compatible with socket RSLZ and socket SSLZ." "Its simple modular design facilitates post installation servicing, modification and adaption of machines by non-specialists." "It can be matched with any relay socket from RSLZ and SSLZ ranges." "It is a well designed product to help reducing your installation time." 0 0 0 0 0 0 0 0 0 0 0 0