38
Leakage Current (24 VDC)
A leakage current can cause false inputs when using 2-wire sensors (proximity
switches or photoelectric switches) or limit switches with LEDs.
False inputs won’t occur if the leakage current is less than 1.0 mA (2.5 mA for
IN00000 to IN00002), but if the leakage current exceeds these values, insert a
bleeder resistor in the circuit to reduce the input impedance, as shown in the fol-
lowing diagram.
R
CPM1
Input power
supply
Bleeder resistor
2-wire sensor, etc.
I: Device’s leakage current (mA)
R: Bleeder resistance (k
Ω
)
W: Bleeder resistor’s power rating (W)
The equations above were derived from the following equations:
L
C
: CPM1’s input impedance (k
Ω
)
I
C
: CPM1’s input current (mA)
E
C
: CPM1’s OFF voltage (V) = 5.0 V
R
+
L
C
5.0
I
L
C
–5.0
k
W
max.
W
+
2.3
R
W min.
I
R
Input voltage (24)
Input Current (I
C
)
R
)
Input voltage (24)
Input Current (I
C
)
x
OFF voltage (E
C
: 5.0)
W
y
Input voltage (24)
R
Input voltage (24)
tolerance (4)
Refer to 2-1-3 I/O Specifications for details on the values L
C
, I
C
, and E
C
.
The input impedance, input current, and OFF voltage may vary depending on the
input being used. (IN00000 through IN00002 have different values.)
Inductive Loads
When connecting an inductive load to an input, connect a diode in parallel with
the load. The diode should satisfy the following requirements:
1, 2, 3...
1. Peak reverse-breakdown voltage must be at least 3 times the load voltage.
2. Average rectified current must be 1 A.
IN
COM
Diode
CPM1
3-4-4 Output Wiring
Wire the outputs to the CPM1’s CPU Unit and Expansion I/O Unit as shown in the
following diagrams. Use crimp connectors or single-wire lines (not stranded
wire) to connect to the PC. The power supply output terminals can be used with
AC-type CPU Units.
•
Always use single wire or attach crimp connectors if a stranded wire is used.
•
Don’t exceed the output capacity or the maximum common current. Refer to
2-1-3 I/O Specifications for details.
Item
Specification
Output capacity
2 A (250 VAC or 24 VDC)
Max. common capacity
4 A/common
Wiring and Connections
Section 3-4
Содержание SYSMAC CPM1
Страница 1: ...Cat No W262 E1 4 Programmable Controllers SYSMAC CPM1 OPERATION MANUAL ...
Страница 2: ...CPM1 Programmable Controllers Operation Manual Revised February 1998 ...
Страница 116: ...105 Appendix B Dimensions All dimensions are in millimeters CPM1 10CDR j 121 130 85 81 90 ...
Страница 117: ...Appendix B Dimensions 106 CPM1 20CDR j 85 171 180 81 90 CPM1 30CDR j CPM1 30CDR j V1 Available soon 85 221 230 81 90 ...
Страница 118: ...Appendix B Dimensions 107 CPM1 20EDR 81 90 171 180 85 ...
Страница 119: ...Appendix B Dimensions 108 CPM1 CIF01 90 81 21 30 205 50 56 CPM1 CIF11 90 81 21 30 205 50 61 ...