Sevcon Gen4 Applications Reference Manual page 44

Table 3: Impedance at Digital Input Pins
Note to Table 3:
Configure the digital input switches as active-high (switched to Vb) or active-low (switched to
battery negative). Configuration applies to all digital input switches (1 to 8) i.e. they are all active-
high or all active-low. See section Digital inputs (page 6-14) for more details.
When a switch is open the digital input pin sits at approximately 0.5 x Vb (type 'A') or 0.4 x Vb
(type 'B'). The input sinks current in active-high configurations and sources current in active-low
configurations.
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