H7ET-N Omron, H7ET-N Datasheet - Page 11
![TIME COUNTER LCD NO-VOLT IN BG](/photos/6/44/64471/h7et-n_sml.jpg)
H7ET-N
Manufacturer Part Number
H7ET-N
Description
TIME COUNTER LCD NO-VOLT IN BG
Manufacturer
Omron
Series
H7ETr
Specifications of H7ET-N
Operating Mode
Accumulative
Output Type
None
Voltage - Supply
None Required (Battery Included)
Termination Style
Screw Terminal
Display Type
LCD Non-Backlit
Number Of Digits/alpha
7
No. Of Digits / Alpha
7
Digit Height
8.6mm
Operating Temperature Range
-10°C To +55°C
Svhc
No SVHC (15-Dec-2010)
External Depth
48.5mm
External Length / Height
24mm
External Width
48mm
Operating Temperature Max
55°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Input Type
-
Count Rate
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
H7ET-N
H7ETN
H7ETNQ
Z3003
H7ETN
H7ETNQ
Z3003
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
H7ET-N
Manufacturer:
Omron Electronics Inc-IA Div
Quantity:
135
Company:
Part Number:
H7ET-NFV1-B
Manufacturer:
Omron Electronics Inc-IA Div
Quantity:
135
Company:
Part Number:
H7ET-NV1
Manufacturer:
Omron Electronics Inc-IA Div
Quantity:
135
New H7E
Precautions
Power Supply
4. Wipe the back of the new Battery before inserting it.
5. Ensure that the + and – terminals are correctly oriented.
6. After replacing the Battery, re-insert the body into its case. (4)
7. Press the Reset Key before use (not necessary for
PCB-mounting Counter
Use the power supply within the applicable range indicated by
the following waveform, while considering the ripple and voltage
fluctuations of the circuit power source.
The H7Ej-NjP changes its mode as shown below depending
on the applied supply voltage.
Approx. 2.6
Approx. 2.2
Voltage
Check that the case is securely held in by the lift-tab.
H7ER-N,-NV,-NV1). (5)
(V)
3.6
3
0
No display
Looks darker
Looks normal
Looks lighter
(5)
Beyond supply voltage
LCD
Tool
(1)
(1)
Normal operation
Normal operation
No operation
(4)
Internal circuit
operation
(3)
Battery
Applicable
range
Battery life
guideline
(2)
3.6 V
2.6 V
EN/IEC Standards
The count or timer input, reset input, and backlight power supply ter-
minals of the no-voltage input or PNP/NPN universal DC voltage
input models (H7Ej-N,-N1, H7Ej-NV(-H),-NV1(-H)) are not isola-
ted.
A SELV power supply conforming to Appendix H of IEC61010-1
should be used for the count or timer input, reset input and backlight
power supply terminals. A SELV power supply is a power supply for
which the input and output have double or reinforced insulation, and
for which the output voltage is 30 Vrms with 42.4 V peak or 60 VDC
max. (Only the H7Ej-NVj-H has a backlight.)
The terminals for count or timer input and reset input for AC/DC mul-
ti-voltage input models have basic insulation.
Connect the reset input terminals to a device that does not have
exposed current-carrying parts and has basic insulation for
240 VAC.
Others
If the indicator keeps flickering or is OFF, the internal battery may be
close to the end of its service life. In such a case, it is suggested that
the battery be replaced.
Battery Replacement
To prevent unwanted reset when replacing the battery, connect the
new battery before disconnecting the old one. Otherwise, the volt-
age supplied to the counter circuit drops, causing the present count
value to reset.
When designing the circuit board, providing two extra terminals for
battery connection will make the switch must simpler. See the sche-
matic diagram below:
Wiring polarity must be carefully observed, in order to prevent per-
manent damage to the Counters. Exercise caution when inserting
the Counter in the socket, to prevent reversed polarity.
H7Ej-NjP
New H7E
33