G GD GB GDB GU GUB 3 wire N.O. (A contact) Standard GXL-8F 3 wire N.O. (A contact) Varying frequencies GXL-8FI LXF LXS 3 wire N.C. (B contact) Standard GXL-8FB 3 wire N.C. (B contact) Varying frequencies GXL-8FIB 2 wire N.O. (A contact) Standard GXL-8FU 2 wire N.C. (B contact) Standard GXL-8FUB Switch specifications (SUNX Corporation) GXL-8F(I)(B) GXL-8FU GXL-8FUB Part no.