Pepper Computer RS485 User Manual
Digital Modules
08 Jan. 98
SMART I/O User’s Manual
Page 4 - 53
Manual ID 09901, Rev. Index 0500
4.4 SM-ACI1
4.4.1 Introduction
The SM-ACI1 provides eight optoisolated 80 V AC to 264 V
AC inputs arranged in six independent groups with respect to
common neutral connections. The input frequency range is 47-
63 Hz, with the system registering a logical ’1’ when the input is
active. A logical ’0’ is returned when the input is no longer
active. However, a low-pass filter restricts signals exceeding the
filter limit, thus registering a logical ’0’ with the system.
AC inputs arranged in six independent groups with respect to
common neutral connections. The input frequency range is 47-
63 Hz, with the system registering a logical ’1’ when the input is
active. A logical ’0’ is returned when the input is no longer
active. However, a low-pass filter restricts signals exceeding the
filter limit, thus registering a logical ’0’ with the system.
The user interface is realized by eight green LEDs (one per input
channel), which switch on when the inputs are energized, and by
a configurable filter on the last channel used for INTx interrupts,
that can be mounted on the specific interrupt slots envisaged for
this purpose.
channel), which switch on when the inputs are energized, and by
a configurable filter on the last channel used for INTx interrupts,
that can be mounted on the specific interrupt slots envisaged for
this purpose.