Datasheet

46 Tachometer H7CX-R
Connections
■ Block Diagram
■ I/O Functions
Note: Refer to page 55 for details on the hold function.
■ Terminal Arrangement
Note: 1. Terminals 4, 5, and 7 are all for the hold function. The func-
tion is the same whichever terminal is connected. Terminals
4, 5, and 7 are not connected internally and so do not use
them for bridge wiring.
2. Recommended wire: AWG 18 to 24 (Cross-sectional area:
0.205 to 0.823 mm
2
), solid or twisted, copper or aluminum
■ Input Circuits
Count and Hold Inputs
No-voltage Inputs (NPN Inputs)
Voltage Inputs (PNP Inputs)
Input circuit
Display circuit
Output circuit
(Basic
insulation) Power supply
circuit
Key switch
circuit
Internal control
circuit
(Basic insulation)(Basic insulation)
Inputs Count Reads counting signals.
Hold Holds the measurement value and outputs.
The hold indicator is lit during hold.
Outputs OUT Outputs signals according to the specified output mode when a comparison value is reached.
6
7
8
9
10
11
1
2
3
4
5
(+)
(−)
Count
Hold
0 V
(−)
(+)
OUT
Hold
Hold
Sensor, etc.
12 VDC
External power supply
Internal circuit
+14 V
1 kΩ
IN
Internal
circuit
Approx. 4.7 kΩ
IN
Internal
circuit