Hardware description chapter 5 – Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS User Manual
Page 42

Hardware Description
Chapter 5
5Ć5
Figure 5.3
Schematic Diagram of the HardwareĆdone Output Cirucit
1
2
3
1
2
3
ANALOG SUPPLY
NOT USED
1771-ES Expander
12012
4
5
6
7
(+15Vdc)
ANALOG
OUTPUT
ANALOG
RETURN
+15Vdc
COMMON
-
ANALOG SUPPLY
(-15Vdc)
(HDW DONE)
4
5
6
7
1k
Ω
The output transistor, normally on, provides a 15mA (maximum) sink.
When the axis feed is done and the axis is in position, the transistor is off
and the circuit provides +15V dc through a 1k resistor. This provides you
with a hardware done signal that is high-true.
In chapter 6, we will show you how to connect the hardware done signal
to a dc (12-24V) Input Module (cat. no. 1771-IB) for axis synchronization
of halt moves.
Discrete Inputs
Terminals 8, 9, 10, and 11 on the left wiring arm provide connection
points for discrete input signals. The module accepts a discrete input
signal as being high when it reaches 40% of the input power supply
voltage. The module accepts a discrete input signal as being low when it
reaches 20% of the input power supply voltage.
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