BENSHAW RSi GM2 Series, Instruction Manual

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23 GM2 Series VFD
890054-00-00
Installing the Inverter
Step 5 PNP/NPN Mode Selection
The GM2 inverter supports both PNP (Source) and NPN (Sink) modes for activating the digital
inputs at the control board terminals. Select an appropriate mode to suit switching requirements
using the PNP/NPN selection switch (SW1) on the control board. The following describes each
mode along with connection diagrams.
NPN Mode (Sink)
This is the factory default setting of the inverter. With SW1 in the NPN position, connect an
external contact (switch, relay, transistor) between Px and CM. When the external contact closes,
the input is activated by connecting the internal 24V source to CM (sink). CM is the common
ground terminal for all digital input terminals.
PNP Mode (Source)
With SW1 in the PNP position, the input is activated by applying 24V to the digital input. Connect
an external contact (switch, relay, transistor) between 24 and Px terminal. When the contact closes,
the input is activated by connecting 24V to the digital input (source). The 24V source can be from
the inverters 24 terminal or an external supply. When using an external 24V source, connect the
external source (-) to the CM terminal. CM is the common ground terminal for all digital inputs.