Omron SYSMAC CS Series Operation Manual page 351

Wiring
Alarm Output (C200HW-PA204C Only)
We recommend connecting a dummy load as shown in the following diagram
if the maximum operating voltage of the connected device is 26.4 V (24 V
+10%).
24 V DC
OUTPUT
Resistance of the dummy load: 120 Ω when I
24
R=
0.3 – l
Power rating of the dummy load (with a safety factor of 5):
W = (0.3 – l
Note Since the dummy load will generate heat, be careful not to allow any combus-
tible materials to come in contact with the resistor.
Connect the alarm output to a PLC's Input Unit or external LED indicator to
enable notification when Power Supply Unit replacement is required.
ON: Power Supply Unit replacement not required for at least 6 months.
OFF: Power Supply Unit replacement required within 6 months.
Output Specifications:
30 VDC max., 50 mA max.
ON: Residual voltage of 2 V max., OFF: Leakage current of 0.1 mA max.
PLC Input Unit Wiring Example
Connect the positive terminals of the 24-V DC power supply to the Input Unit
common (COM) terminals.
240 Ω when I
Not necessary when I
(I : Total current of connected devices)
L
L
30 W (120 Ω) when I
) × 26.4 × 5
15 W (240 Ω) when I
L
Transistor open-collector output
Section 5-3
I
L
Connected
device
(Photoelectric
Switch, Sen-
Dummy
sor Input Unit,
load
etc.
R
L
= 0.1 A
L
= 0.2 A
L
= 0.3 A
L
= 0.1 A
L
= 0.2 A
L
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