Download CPM2C-S - Valtek

Section
Wiring and Connections
3-4
Special functions for input bits IR 00003 through IR 00006 are set in DM 6628:
Bit
address
dd
Bits in
DM 6628
IR 00003
00 to 03
IR 00004
04 to 07
PC Setup setting (in DM 6628)
0 (Hex)
Used as normal
inputs
inputs.
1 (Hex)
Used as interrupt
inputs (including
counter mode).
2 (Hex)
Used as
quick response
quick-response
inputs.
High-speed Counter Input Connection Examples
Differential Phase Mode
(Count frequency: 5 kHz)
E6B2-CWZ6C
Encoder
(NPN open-collector output)
Black
White
Orange
Pulse Plus Direction Input mode
(Count frequency: 20 kHz)
E6A2-CS5C
Encoder
00000 A-phase input
00001 B-phase input
00001 Direction input
00002 Z-phase input
COM
Sensor
power
COM
Sensor or
switch
24 VDC
Leakage Current
00002 Reset input
Sensor or
switch
Brown
Blue
00000 Pulse input
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. If the leakage current
exceeds these values, insert a bleeder resistor in the circuit to reduce the input
impedance, as shown in the following diagram.
Input power
supply
R
Bleeder
resistor
CPM2C-S
2-wire sensor, etc.
I: Device’s leakage current (mA)
R: Bleeder resistance (kΩ)
W: Bleeder resistor’s power rating (W)
R+
LC
I
LC: CPM2C-S’ input impedance (kΩ)
IC: CPM2C-S’ input current (mA)
EC: CPM2C-S’ OFF voltage (V) = 5.0 V
5.0
kW max.
L C–5.0
W + 2.3 W min.
R
The equations above were derived from the following equations:
R
Input voltage (24)
Input current (I C)
R)
Input voltage (24)
Input current (I C)
I
Wy
Input voltage (24)
R
x OFF voltage (E C : 5.0)
Input voltage (24)
tolerance (4)
Refer to 2-1-3 I/O Specifications for details on the values LC, IC, and EC.
The input impedance, input current, and OFF voltage may vary depending on the
input being used. (IN00000 through IN00002 have different values.)
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