Advantech PCIE-1760, Руководство пользователя

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17 PCIE-1760 User Manual
Chapter 3
S
ignal Connections
Isolated Digital Input
Each of the 8 isolated digital input channels accepts either dry contact or 10 ~ 30 V
DC
wet contact inputs as determined by the corresponding jumper settings (see Table
3.1). Dry contact capability allows an input channel to respond to changes in an
external circuit (e.g., the closing of a switch in the external circuit) when no voltage is
present in the external circuit. Figure 3.2 shows the internal and external circuitry,
with both wet and dry contact components connected as an input source for one of
the PCIE-1760's isolated digital input channels.
Figure 3.2 Isolated DI Connection
Relay Output
Of the total eight relays, two relays (Channel 0 and 1) are single-pole double-throw
(SPDT, Form C) and six relays (Channel 2 to Channel 7) are single-pole single-throw
(SPST), which can be set as either normally open (NO) or normally closed (NC) via
jumper settings. The following figure illustrates the structures and connections of the
relay outputs.
Figure 3.3 Relay Output Connection