A trill, generally three very fast notes on updating the two clockwise-most pins, looking from below. Clock rate goes down when resistance goes up, opposite to expectation. C1 is too small; need more than fifty percent (50%) of the hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924046 16A (HC Generic Phoenix Contact connector footprint for: MCV_1,5/8-G-3.81; number of pins: 16; pin pitch: 5.08mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST.