Omron H7CX- -N Series, Manual

Page: 37 / 57

H7CX-R
@
-N
37
• Tachometer-only model (DIN 48
×
48) for the H7CX
(Supports display and alarm outputs for numbers of rotations,
speed, and flow rate.)
• Socket design allows either flush or surface mounting.
• "-W" models added to provide two sets of measurement controls.
*
• Operation in any of the four following modes is possible with the
same Unit: Upper and lower limit, upper limit, lower limit, and area.
• Equipped with auto-zero time, average processing, and startup
time functions.
*
The prescale value and auto-zero time settings are one.
Specifications
Ratings
*1. Do not use the output from an inverter as the power supply. The ripple must be 20% maximum for CC power.
*2. The display is lit only when the power is ON. Nothing is displayed when power is OFF.
H7CX-R
@
-N Tachometer
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Classification Tachometer
Item Model H7CX-R11
@
-N H7CX-R11W
@
-N
Input mode 1 input only 2 inputs only
Ratings
Power supply volt-
age
*1
• 100 to 240 VAC, 50/60 Hz
• 12 to 24 VDC or 24 VAC, 50/60 Hz
Operating voltage
fluctuation range
85% to 110% of rated supply voltage (90% to 110% at 12 to 24 VDC)
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, Approx. 3.7 W at 12 to 24 VDC
Mounting method Flush mounting or surface mounting
External connections 11-pin socket
Degree of protection IEC IP66, UL508 Type 4 (indoors) for panel surface only and when Y92S-29 Waterproof Packing is used
Input signals Count and hold Count 1 and count 2
Pulse measurement method Tachometer mode (cycle measurement)
AMD-compatible mode (continuous
measurement)
Tachometer mode (cycle measurement)
Maximum counting speed
30 Hz
(minimum pulse
width: 16.7 ms) 10 kHz
(minimum pulse
width: 0.05 ms)
---
30 Hz (minimum pulse width: 16.7 ms) or 5 kHz
(minimum pulse width: 0.1 ms) (selectable)
Minimum input signal width --- 10 ms 1 ms ---
Measuring ranges 0.001 Hz to 30.00Hz 0.001 Hz to 10 kHz 0.026 to 999999 s 0.003 to 999999 s 0.01 to 5k Hz
Sampling cycle 200 ms min.
Continuous measurement (minimum
interval of 10 ms)
200 ms min.
Display refresh cycle
• Input pulse of 5 Hz min.
Averaging not used: 200 ms
Averaging used: 200 multiplied by the averaging setting (ms)
• Input pulse of less than 5 Hz
Averaging not used: Two times the maximum input pulse cycle
Using averaging: Two times the maximum of the input pulse cycle multiplied by the averaging setting.
Measuring accuracy
±
0.1% FS
±
1 digit max. (at 23
±
5
°
C)
Output mode HI-LO, AREA, HI-HI, LO-LO HI-HI, LO-LO
Auto-zero time 0.1 to 999.9 s (in Tachometer Mode)
Startup time 0.0 to 99.9 s
Averaging Simple averaging/moving averaging selectable, Number of times: OFF, 2, 4, or 8 times
Prescaling function 0.001 to 99.999 (in Tachometer Mode)
Decimal point adjustment Rightmost 3 digits ---
Sensor waiting time 290 ms max. (Control output is turned OFF and no input is accepted during sensor waiting time.)
Input
Input method
No-voltage Input
Impedance when ON: 1 k
Ω
max.
(Leakage current: 12 mA when 0
Ω
)
ON residual voltage: 3 V max.
Impedance when OFF: 100 k
Ω
min.
Voltage Input
High (logic) level: 4.5 to 30 VDC
Low (logic) level: 0 to 2 VDC
(Input resistance: approx. 4.7 k
Ω
)
No-voltage input/voltage input (selectable)
Hold input Minimum input signal width: 20 ms ---
External power supply
12 VDC (
±
10%), 100 mA
* Refer to Safety Precautions (Common) on page page 52 for details.
Control output
Contact output: 3 A at 250 VAC/30 VDC, resistive load (cos
φ
=1)
Minimum applied load:10 mA at 5 VDC (failure level: P, reference value)
Display*2
7-segment, negative transmissive LCD
Character height
Present value: 10 mm (red), comparison value: 6 mm (green)
Digits 6 digits (0 to 999999)
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 Counter/Tachometers 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%
Case color Black (N1.5)