Electrical Installation 2 - 23
Sinking/Sourcing Mode
The multi-function digital input terminal logic can be switched between sinking mode (0Vdc common) and sourcing mode
(+24Vdc common) by using the terminals SN, SC, and SP. An external power supply can also be connected, providing more
freedom in signal input methods.
Table 2.15 Sinking/Sourcing Mode and Input Signals
Internal Power Supply – Sinking Mode
(Factory Default)
IP24V (+24Vdc)
External Power Supply – Sinking Mode
External +24Vdc
IP24V (+24Vdc)
Internal Power Supply – Sourcing Mode
IP24V (+24Vdc)
External Power Supply – Sourcing Mode
External +24Vdc
IP24V (+24Vdc)
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