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Analog Output Units Section 7-3
Internal Circuits The following diagram shows the internal circuit using CP1W-DA041/DA042
as an example, which wires analog outputs 1 to 4. In the case of CP1W-
DA021, analog outputs 1 to 2 can be used.
■ Wiring for Analog Outputs
Note (1) Connect the shield to the FG terminal to prevent noise.
(2) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(3) When there is noise in the power supply line, install a noise filter on the
input section and the power supply.
(4) When external power is supplied (when range codes are set), or when the
power is interrupted, there may be a pulse status analog output of up to
1 ms. If this status is a problem, take the following measures.
• Turn ON the power to the CP1H CPU Unit, check the operation status,
and then turn ON the power at the load.
• Turn OFF the power to the load and then turn OFF the power to the
CP1H CPU Unit.
Allocating Output Words Four output words (n+1 to n+4) are allocated, beginning from the first word fol-
lowing the last I/O word allocated to the CPU Unit or already-connected
Expansion I/O Unit or Expansion Unit. For CP1W-DA021, two output words
(n+1, n+2) are allocated.
2. Wiring Analog Outputs
Analog output 1
Analog ground
NC
I OUT1
COM1 (−)
V OUT1
I OUT4
COM4 (−)
V OUT4
Analog output 4
Internal circuits
toto
+
V OUT
COM
I OUT
−
+
V OUT
COM
I OUT
−
Analog
output
unit
Analog
device
with
voltage
input
Analog
output
unit
Analog
device
with
current
input
2-core shielded
twisted-pair cable
FG
2-core shielded
twisted-pair cable
FG
3. Creating the Ladder Program
Words n+1 to n+4
CP1W-DA041/
CP1W-DA042
Analog Output Unit
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