Self-powered Time Counter
H7ET
Counters
• Seven digits, time range 0 to 3999d23.9h.
• Dual time range: 999999.9
←→
3999d23.9h or
999h59m59s
←→
9999h59.9m
Model Number Structure
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Model Number Legend
H7ET - N
1
2
-
3
4
1. Count Input
None: No-voltage input
V:
PNP/NPN universal DC voltage input
FV:
AC/DC multi-voltage input
2. Time Range
None: 999999.9h/3999d23.9h
1:
999h59m59s/9999h59.9m
3. Case Color
None: Light gray
B:
Black
4. Display
None: 7-segment LCD without backlight
H:
7-segment LCD with backlight
Ordering Information
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Time Counters
Timer input
Display
999999.9h
←→
3999d23.9h
(switchable)
Light-gray body
PNP/NPN universal DC volt- 7-segment LCD with back-
age input
light
7-segment LCD
AC/DC multi-voltage input
No-voltage input
7-segment LCD
7-segment LCD
H7ET-NV-H
H7ET-NV
H7ET-NFV
H7ET-N
Black body
H7ET-NV-BH
H7ET-NV-B
H7ET-NFV-B
H7ET-N-B
Time range
999h59min59s
←→
9999h59.9min
(switchable)
Light-gray body
H7ET-NV1-H
H7ET-NV1
H7ET-NFV1
H7ET-N1
Black body
H7ET-NV1-BH
H7ET-NV1-B
H7ET-NFV1-B
H7ET-N1-B
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Accessories (Order Separately)
Lithium Battery
Wire-wrap Terminal (set of two terminals)
Flush Mounting Adapter
Y92S-36
Y92S-37
26 mm
×
45.3 mm
27.5 mm
×
52.5 mm
24.8 mm
×
48.8 mm
Note:
The New H7E models are supplied with a Y92F-34 Mounting Bracket.
Y92F-75
Y92F-76
Y92F-77B
Compact Flush Mounting Bracket (See note.)
Y92F-35
Self-powered Time Counter
H7ET
C-17
Specifications
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General
Item
Operating mode
Mounting method
External connections
Reset
Display
Number of digits
Time range
Timer input
H7ET-NV-@
H7ET-NV-@H
Accumulating
Flush mounting
Screw terminals
External/Manual reset
7-segment LCD with or without backlight, zero suppression (character height: 8.6 mm) (see note 1)
7
0.0h to 999999.9h
←→
0.0h to 3999d23.9h
(switchable with switch)
PNP/NPN univer- AC/DC multi-volt-
sal DC voltage in- age input
put
Light gray or black (-B models)
Waterproof packing, flush mounting bracket, time unit labels (see note 2)
UL863, CSA C22.2 No.14, Lloyds
Conforms to EN61010-1/IEC61010-1 (pollution degree2/overvoltage category
III)
Conforms to VDE0106/P100
No-voltage input
0s to 999h59min59s
←→
0.0min to 9999h59.9min
(switchable with switch)
PNP/NPN univer- AC/DC multi-volt-
sal DC voltage in- age input
put
No-voltage input
H7ET-NFV-@
H7ET-N-@
H7ET-NV1-@
H7ET-NV1-@H
H7ET-NFV1-@
H7ET-N1-@
Case color
Attachment
Approved standard
Note: 1.
Only PNP/NPN universal DC voltage input models (-H models) have a backlight.
2.
“-hours”, “-d-h”, “-h-m”, and “-h-m-s” labels are included.
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Ratings
Item
Supply voltage
H7ET-NV@-@
H7ET-NV@-@H
H7ET-NFV@-@
H7ET-N@-@
Backlight model: 24 VDC (0.3 W max.) Not required (powered by built-in battery)
(for backlight)
No-backlight model: Not required (pow-
ered by built-in battery)
High (logic) level: 4.5 to 30 VDC
Low (logic) level: 0 to 2 VDC
(Input impedance: Approx. 4.7 kΩ)
High (logic) level: 24 to 240 VAC/VDC,
50/60 Hz
Low (logic) level: 0 to 2.4 VAC/VDC, 50/
60 Hz
No voltage input
Maximum short-circuit impedance:
10 kΩ max.
Short-circuit residual voltage: 0.5 V max.
Minimum open impedance: 750 kΩ min.
1s
External reset and manual reset: Minimum signal width of 20 ms
0.98 N·m max.
No voltage input
Maximum short-circuit impedance:
10 kΩ max.
Short-circuit residual voltage: 0.5 V max.
Minimum open impedance: 750 kΩ min.
Timer input
Reset input
Minimum pulse
width
Reset system
Terminal screw
tightening torque
Ambient tempera-
Operating: -10°C to 55°C (with no condensation or icing)
Storage: -25°C to 65°C (with no condensation or icing)
ture
Ambient humidity
Operating: 25% to 85%
C-18
Self-powered Time Counter
H7ET
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Characteristics
Item
Time accuracy
Insulation resistance
H7ET-NV@-@
H7ET-NV@-H@
±100
ppm (25°C)
100 MΩ min. (at 500 VDC) between
current-carrying metal parts and ex-
posed non-current-carrying metal
parts, and between the backlight pow-
er supply and timer input terminals/re-
set terminals for backlight models
1,000 VAC, 50/60 Hz for 1 min be-
tween current-carrying metal parts and
exposed non-current-carrying metal
parts and between the backlight power
supply and timer input terminals/reset
terminals for backlight models
100 MΩ min. (at 500 VDC) between
current-carrying metal parts and ex-
posed non-current-carrying metal
parts and between timer input termi-
nals and reset terminals
3,700 VAC, 50/60 Hz for 1 min be-
tween timer input terminals and ex-
posed non-current-carrying metal
parts
2,200 VAC, 50/60 Hz for 1 min be-
tween reset terminals and exposed
non-current-carrying metal parts and
between timer input terminals and re-
set terminals
100 MΩ min. (at 500 VDC) between
current-carrying metal parts and ex-
posed non-current-carrying metal
parts
Counters
H7ET-NFV@-@
H7ET-N@-@
Dielectric strength
1,000 VAC, 50/60 Hz for 1 min be-
tween current-carrying metal parts and
exposed non-current-carrying metal
parts
Impulse withstand
voltage
4.5 kV between current-carrying termi- 4.5 kV between current-carrying termi- 4.5 kV between current-carrying termi-
nal and exposed non-current-carrying nal and exposed non-current-carrying nal and exposed non-current-carrying
metal parts
metal parts
metal parts
3 kV between timer input terminals and
reset terminals
Square-wave noise generated by noise simulator (pulse width: 100 ns/1
µs,
1-ns rise)
±600
V (Between timer input terminals/
±1.5
kV (Between timer input termi-
Between reset terminals)
nals)
±480
V (Between the backlight power
±500
V (Between reset terminals)
supply terminals for backlight models)
±500
V (Between timer input terminals/
Between reset terminals)
Noise immunity
Static immunity
Vibration resistance
Shock resistance
EMC
±8
kV (malfunction)
Malfunction: 0.15-mm single amplitude at 10 to 55 Hz for 10 min each in 3 directions
Destruction: 0.375-mm single amplitude at 10 to 55 Hz for 2 hrs each in 3 directions
Malfunction: 200 m/s
2
3 times each in 6 directions
Destruction: 300 m/s
2
3 times each in 6 directions
EN61326
EN55011 Group 1 class B
EN61326
EN61000-4-2: 4 kV contact discharge (level 2)
8 kV air discharge (level 3)
Immunity RF-interference from AM Radio Waves:
EN61000-4-3: 10 V/m (80 MHz to 1 GHz) (level 3)
Immunity RF-interference from Pulse-modulated Radio Waves:
EN61000-4-3: 10 V/m (900 MHz
±
5 MHz) (level 3)
Immunity Conducted Disturbance: EN61000-4-6: 10 V (0.15 to 80 MHz) (level 3)
Immunity Burst:
EN61000-4-4: 2 kV power line (level 3)
2 kV I/O signal line (level 4)
Front panel:
IP66, NEMA4 with waterproof packing
Terminal block: IP20
No-backlight model: Approx. 60 g
Backlight model: Approx. 65 g
Approx. 60 g
Approx. 60 g
(EMI)
Emission Enclosure:
(EMS)
Immunity ESD:
Degree of protection
Weight (see note)
Note:
Weight includes waterproof packing and flush mounting bracket.
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Reference Value
Item
Battery life
Value
10 years min. with continuous input at
25°C (lithium battery)
Note
The battery life is calculated according to the conditions in the left column and
therefore is not a guaranteed value. Use these value as reference for mainte-
nance or replacement.
Self-powered Time Counter
H7ET
C-19
Connections
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Terminal Arrangement
Bottom view: View of the Time Counter rotated horizontally 180°
Backlight Model
No-backlight Model
Backlight
24 VDC
Timer
input
Reset
input
Timer
input
Reset
input
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Connections
H7ET Time Counter
PNP/NPN Universal DC Voltage Input Model With Backlight
1. Contact Input (Input by a Relay or Switch Contact)
Relay
Backlight
24 VDC
Input
Input
Reset
Relay
2. Solid-state Input
Open collector of a
PNP transistor
Open collector of a
Backlight PNP transistor
24 VDC
Reset
or Switch
or Switch
or Open collector of an
NPN transistor
or Open collector of an
NPN transistor
Note: 1.
Terminals 2 and 4 (input circuit and reset circuit) are func-
tionally isolated.
2.
Select input transistors according to the following:
Dielectric strength of the collector
≥
50 V
Leakage current < 1
µA
C-20
Self-powered Time Counter
H7ET
PNP/NPN Universal DC Voltage Input Model Without Backlight No-voltage Input Model
1. Contact Input (Input by a Relay or Switch Contact)
Relay
Relay
Relay
Input
Reset
Relay
1. Contact Input (Input by a Relay or Switch Contact)
Input
Reset
or Switch
or Switch
or Switch
or Switch
2. Solid-state Input
Open collector of a
PNP transistor
Open collector of a
PNP transistor
Note:
Use Relays and Switches that have high contact relia-
bility because the current flowing from terminals 1 or
3 is as small as approx. 10
µA.
It is recommended
that OMRON's G3TA-IA/ID be used as the SSR.
2. Solid-state Input
(Open Collector Input of an NPN Transistor)
Open collector of an
NPN transistor
Input
Open collector of an
NPN transistor
Input
Reset
Reset
or Open collector of an
NPN transistor
or Open collector of an
NPN transistor
Terminals 2 and 4 are
internally connected.
or Switch
Note: 1.
Terminals 2 and 4 (input circuit and reset circuit) are
functionally isolated.
2.
Select input transistors according to the following:
Dielectric strength of the collector
≥
50 V
Leakage current < 1
µA
Note: 1.
Residual voltage in the output section of Proximity
Sensors or Photoelectric Sensors becomes less
than 0.5 V because the current flowing from termi-
nals 1 or 3 is as small as approx. 10
µA,
thus allow-
ing easy connection.
2.
Select input transistors according to the following:
Dielectric strength of the collector
≥
50 V
Leakage current < 1
µA
AC/DC Multi-voltage Input Model
Relay
Input
Reset
Relay
or Switch
or Switch
or Open collector of
an NPN transistor
Self-powered Time Counter
H7ET
C-21
Counters
Terminals 2 and 4 are
internally connected.
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