I/O Unit Cover; Dc Two-Wire Sensor Connection Precautions; Wiring Examples - Omron SYSMAC C200H Installation Manual

I/O Connections

I/O Unit Cover

DC Two-wire Sensor
Connection Precautions

Wiring Examples

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A C200H-COV11 Cover is provided as an I/O Unit cover for Units that use 10P
terminal block connectors. After the I/O wiring has been completed, slide the
cover up from the bottom, as shown in the illustration below.
If a two-wire sensor is used with a 12-VDC or 24-VDC input device, make sure
that the following conditions are satisfied. Malfunctions will occur if these condi-
tions are not satisfied.
• The relationship between the PC ON voltage and the sensor residual voltage is
as follows:
x V
V
ON CC
• The relationship between the PC ON current and the sensor control output
(load current) is as follows:
I
OUT (min)
I = (V
ON CC
Connect R bleeder resistance if I
The constant for bleeder resistance is determined by the following equation.
R x (V
CC
Power W y (V
• The relationship between the PC OFF current and sensor leakage current is as
follows:
x I
I
OFF leak
Refer to the information on input and output leakage current on page 56 for
details.
The value of I
OFF
cified OFF current, however, the value of I
V
Two-wire sensor
R
V : Power supply voltage
CC
V : PC ON voltage
ON
I : PC OFF current
ON
I : PC OFF current
OFF
R : PC input impedance
IN
The following are examples of how to connect I/O devices to I/O Units. During
wiring, work slowly and carefully. If an input device is connected to an Output
Unit, damage may result. Check all I/O devices to make sure they meet the spec-
ifications (refer to Appendix B Specifications ).
Attach
Remove
– V
R
x I x I
ON OUT (max)
– V – 1.5 (PC internal residual voltage))/R
R
ON
– V )/(I – I )
R OUT (min) ON
/R  4 (margin)
2
– V )
CC R
depends on the Unit used. For Input Units that have an unspe-
R R
V
CC
V : Sensor output residual voltage
R
I : Sensor control output (load current)
OUT
I : Sensor leakage current
leak
R: Bleeder resistance
Section
I/O Unit cover
IN
is less than I .
OUT (min)
is always 1.8 mA.
OFF
DC Input Unit
IN
4-4
41