Yaskawa MicroTrac DSD Drives Digital Tach - Manual (Page 5)

single ended analog input. The input has a
maximum differential range of +/- 10 VDC
or +/- 0.5 VDC with an input common
mode voltage range of +/-10 VDC. The
overall A/D conversion accuracy is +/- 0.4
% with 12 bits of resolution over the full
scale range. The signal names are labeled
DIFF IN (+) and DIFF IN (-).
Connection terminals are provided that will
supply COMMON and SHIELD tie points.
Also see SETUP.
4-20 mA Input. There is provision for one
non-isolated 4-20 mA analog input. The
input signal feeds a differential amplifier
with a maximum of +5 VDC across a 249
ohm burden resistor at the 20 mA level.
The input common mode voltage range is
+/- 10 VDC. The overall A/D conversion
accuracy is +/- 0.4 % with 12 bits of
resolution over the full scale range. The
signal names are labeled CUR. FOL. IN (-)
and CUR. FOL. IN (+).
Connection terminals are provided that will
supply +5 Vdc, COMMON, and SHIELD tie
points.
Logic Inputs. There is provision for 8 non-
isolated logic inputs. The inputs are
suitable for 24 VDC logic only. All of the
inputs are software configurable to be of
type sink or source, however, all of the
inputs must be of the same type.
An input that is specified as sink is a logical
1 (High) when the input is grounded. In the
sink configuration, a pullup 2.7 K ohm
resistor is provided to the +24 VDC source.
The resistor is provided to keep the input in
the off state (logic 0) in the absence of an
input.
An input that is specified as source means
that an input is a logical 1 (High) when the
input is at the +24 VDC level. In the source
configuration, a pulldown 2.7 K ohm
resistor is provided to COMMON. The
resistor is provided to keep the input in the
off state (logic 0) in the absence of an input.
The signal names are labeled LIN0 through
LIN7.
Connection terminals are provided that will
supply +24 Vdc, COMMON, and SHIELD
tie points.
Thumbwheel Inputs. There is a 26 pin
Thumbwheel Switch Interface connector
(J3) that allows Thumbwheel Selector
Switch Assemblies to be added, via ribbon
cable, in order to configure a given system
to meet specific requirements. The cable is
intended to be connected in a daisy chain
style from Thumbwheel Selector Switch
Assembly to Thumbwheel Selector Switch
Assembly, originating from the Local I/O
board. The Thumbwheel Switch Interface
carries 24 volt logic level signals and power
(+24 VDC, COMMON) to the Thumbwheel
Selector Switch Assemblies.
The PUSH TO LOAD input is continually
scanned. If the input is present, then all of
the thumbwheel switch banks will be
scanned.
A maximum of nine Thumbwheel Selector
Switch Assemblies may be connected to the
Thumbwheel Switch Interface at one time.
Each Thumbwheel Selector Switch
Assembly may have up to three pairs of
thumbwheel switches, for a total of six
thumbwheel switches. The following are
5 I/O 784-10