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Digital Counter


Easy to Use and Easy to Read.


Models H7CZ-L8 H7CZ-L8D1
Configuration 1-stage preset counter
Ratings Power supply voltage *1 100 to 240 VAC, 50/60 Hz 24 VAC, 50/60 Hz or 12 to 24 VDC
Operating voltage
fluctuation range
85% to 110% of rated supply voltage (12 to 24 VDC: 90% to 110%)
Power consumption Approx. 9.4 VA at 100 to 240 VAC,
Approx. 7.2 VA/4.7 W at 24 VAC/12 to 24 VDC
Mounting method Flush mounting or surface mounting
External connections 8-pin socket
Degree of protection IEC IP66, UL508 Type 4X (indoors) for panel surface only and only when Y92S-
29 Waterproof Packing is used.
Input signals Count, Reset
Counter Maximum counting speed 30 Hz or 10 kHz (switchable) (ON/OFF ratio 1:1)
Input mode Increment, Decrement
Output mode N, F, C, R, K-1, P, Q, and A.
One-shot output time 0.01 to 99.99 s
Reset system External (minimum reset signal width: 1 ms or 20 ms, selectable), Manual, and
Automatic reset (internal according to C, R, P, and Q mode operation)
Prescaling function Yes (0.001 to 99.999)
Decimal point adjustment Yes (rightmost 3 digits)
Sensor waiting time 290 ms max. (Control output is turned OFF and no input is accepted during
sensor waiting time.)
Input method No-voltage inputs:
ON impedance: 1 kΩ max. (Leakage current: 12 mA at 0 Ω)
ON residual voltage: 3 V max.
OFF impedance: 100 kΩ min.
Control output 3 A at 250 VAC/30 VDC, resistive load (cosφ=1), Minimum applied load: 10 mA
at 5 VDC (failure level: P, reference value)
Display *2 LCD
Character height
Count value: 10 mm
Set value: 6 mm
Digits 6 digits
-99999 to 999999
(-5 digits to +6 digits)
Memory backup EEPROM (overwrites: 100,000 times min.) that can store data for 10 years min.
Operating temperature range -10 to 55°C (-10 to 50°C if Counters are mounted side by side) (with no
icing or condensation)
Storage temperature range -25 to 70°C (with no icing or condensation)
Operating humidity range 25% to 85%
Front panel color Light gray (5Y7/1)

*1. Do not use the output from an inverter as the power supply.The ripple must be 20% maximum for DC power.
*2. The display is lit only when the power is ON. Nothing is displayed when power is OFF.


Insulation resistance 100 MΩ min. (at 500 VDC) between current-carrying terminals and exposed non-
current-carrying metal parts, and between non-continuous contacts
Dielectric strength 2,000 VAC, 50/60 Hz for 1 min between current-carrying metal parts and non-current-
carrying metal parts
2,000 VAC, 50/60 Hz for 1 min between power supply and input circuit (1,000 VAC for
24 VAC/12 to 24 VDC)
1,000 VAC, 50/60 Hz for 1 min between control output, power supply, and input circuit
(2,000 VAC)
1,000 VAC, 50/60 Hz for 1 min between non-continuous contacts
Impulse withstand voltage 3.0 kV between power terminals (1.0 kV for models with 24 VAC/12 to 24 VDC)
4.5 kV between current-carrying terminals and exposed non-current-carrying metal
parts (1.5 kV for models with 24 VAC/12 to 24 VDC)
Noise immunity ±1.5 kV between power terminals
±600 V between input terminals
Square-wave noise by noise simulator (pulse width: 100 ns/1 μs, 1-ns rise)
Static immunity Malfunction: 8 kV
Destruction: 15 kV
Destruction 10 to 55 Hz with 0.75-mm single amplitude each in three directions for 2 h each
Malfunction 10 to 55 Hz with 0.35-mm single amplitude each in three directions for 10 min each
Destruction 300 m/s2 each in three directions
Malfunction 100 m/s2 each in three directions
Life expectancy Mechanical: 10,000,000 operations min.
Electrical: 100,000 operations min. (3 A at 250 VAC, resistive load, ambient temperature
condition: 23°C)*
Weight Approx. 100 g (Counter only)

* Refer to the Life-test Curve.

Life-test Curve (Reference Values)

Resistive load

H7CZ Specifications 6

Inductive load

H7CZ Specifications 7

A current of 0.15 A max. can be switched at 125 VDC (cosφ=1) and current of 0.1 A max. can be switched if L/R=7 ms. In both cases, a life of 100,000 operations can be expected.

Applicable Standards

Approved safety
cULus (or cURus): UL508/CSA C22.2 No. 14 *1
EN 61010-1 (IEC 61010-1): Pollution degree 2/overvoltage category II
1/4 HP 120 VAC, 1/3 HP, 240 VAC, 3 A resistive load
VDE0106/P100 (finger protection)
EMC (EMI) EN61326-1 *2
Emission Enclosure: EN 55011 Group 1 class A
Emission AC mains: EN 55011 Group 1 class A
(EMS) EN61326-1 *2
Immunity ESD: EN 61000-4-2: 4 kV contact discharge; 8 kV air discharge
Immunity RF-interference: EN 61000-4-3: 10 V/m (Amplitude-modulated, 80 MHz to 1 GHz);
10 V/m (Pulse-modulated, 900 MHz ±5 MHz)
Immunity Conducted Disturbance: EN 61000-4-6: 10 V (0.15 to 80 MHz)
Immunity Burst: EN 61000-4-4: 2 kV power-line; 1 kV I/O signal-line
Immunity Surge: EN 61000-4-5: 1 kV line to lines (power and output lines);
2 kV line to ground (power and output lines)
Immunity Voltage Dip/Interruption: EN 61000-4-11: 0.5 cycle, 100% (rated voltage)

*1. The following safety standards apply to H7CZ.
       cUL (Listing): Applicable when an OMRON P2CF(-E) Socket is used.
       cUR (Recognition): Applicable when any other socket is used.
*2. Industrial electromagnetic environment (EN/IEC 61326-1 Table 2)

I/O Functions

Using as a Counter *1

Inputs Count • Reads counting signals.
• Increment and decrement inputs accepted.
Reset • Resets present value and outputs.*2
• Counting cannot be performed during reset input.
• Reset indicator is lit while reset input is ON.
Outputs OUT Outputs signals according to the specified output mode when a set value is reached.

*1. For information on operation of I/O functions, refer to Catalog.
*2. In elapsed time mode, the present value returns to 0; in remaining time mode, the present value returns to the set

The following table shows the delay from when the reset signal is input until the output is turned OFF. (Reference values)

Minimum reset signal width Output delay time
1 ms 0.8 to 1.2 ms
20 ms 15 to 25 ms