Omron SYSMAC C200H Installation Manual page 57

I/O Connections
Terminal Block
I/O Unit Cover
DC Two-wire Sensor
Connection Precautions
48
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The terminal block of an I/O Unit can be removed by loosening the mounting
screws. You do not have to remove the lead wires from the terminal block in or-
der to remove it from an I/O Unit.
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.
Attach
Remove
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 – V
ON CC R
• The relationship between the PC ON current and the sensor control output
(load current) is as follows:
x I x I
I
OUT (min) ON OUT (max)
I = (V – V – 1.5 (PC internal residual voltage))/R
ON CC R
Connect R bleeder resistance if I
The constant for bleeder resistance is determined by the following equation.
R x (V
– V )/(I
CC R OUT (min)
Power W y (V
– V
CC
• The relationship between the PC OFF current and sensor leakage current is as
follows:
Locks for terminal block.
Unlock to remove the terminal
block from the I/O Unit. Make
sure the terminal block is
locked securely after wiring is
complete.
I/O Unit cover
is less than I
ON
– I )
ON
/R  4 (margin)
2
)
R
Section 4-4
IN
.
OUT (min)