Wago test plug adaptor 1 pole for 255 257 series pcb terminal blocks 249 series wago 249 112 wago 249 112 test plug adaptor 1 pole for 255 256 257 series pcb terminal blocks pin spacing 75mm 0295 in grey wago 249 112 test plug adaptor 1 pole for 255 257 pcb terminal blocks grey 100pk