Panasonic FP E Series User Manual page 35

Limitations on number of simultaneous input on points
Keep the number of input points per common which are simultaneously on within the following range as
determined by the ambient temperature.
Circuit diagram
[X0, X1, X3, X4] [X2, X5 to XF]
For X2, X5 to X7: R1=5.6kΩ R2=1kΩ
For X8 to XF: R1=6.8kΩ R2=820Ω
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