... time delay contact, LA2-D24 time delay contact, LA3-D20 time delay contact, LA3-D22 time delay contact, LA3-D24 time delay contact LA air time ... _: LA2-D denotes switch-on time delay, LA3-D denotes switch-off time delay. _: 20 denotes range of time delay 0.1~3s ... _: 22 denotes range of time ...