Omron H7E-P Series User manual

Operating mode UP type
Display LCD digital, 5.1 mm (0.2 in) high
Reset system External (electrical) reset, power-OFF reset
Number of digits 7
Count input No-voltage (solid-state) input No-voltage (contact, solid-state) input
Max. counting speed 1 kcps 30 cps
Mounting style Mounts directly on PCB, or with 28-pin IC socket
Part number H7EC-P H7EC-LP
Operating mode UP type
Display LCD digital, 5.1 mm (0.2 in) high
Reset system Automatic (No external or manual reset)
Number of digits 4 5
Count input No-voltage (solid-state) input DC voltage input
Max. counting speed 1 kcps 10 kcps
Applicable encoder resolution 1 pulse/rev 60 pulses/rev
Max. revolutions displayed 1,000 rps 10,000 rpm
Mounting style Mounts directly on PCB, or with 28-pin IC socket
Part number H7ER-P H7ER-VP H7ER-V2P
Operating mode UP type
Display LCD digital, 5.1 mm (0.2 in) high
Reset system External (electrical) reset, power-OFF reset
Number of digits 7 (0.0 to 999999.9 h)
Count input No-voltage (contact, solid-state) input
Mounting style Mounts directly on PCB, or with 28-pin IC socket
Part number H7ET-P
PC Board-Use Counter H7E-P
Miniature Counter for PC Board Usage
■LSI with built-in digital filter ensures
excellent noise immunity
■Machine insertable
■Can be mounted on 28-pin IC socket
■Totalizing counter, time counter and
tachometer available
Ordering Information
■TOTALIZING COUNTERS
■TIME COUNTER
■DIGITAL TACHOMETERS
Connecting socket
Description Part number
28-pin (standard quality) XR2A-2801-N
■ACCESSORIES

H7E-P
H7E-P
2
Supply voltage 3 VDC
Operating voltage range 90 to 110% of supply voltage
Current consumption Models H7EC-❑P and H7ER-P: 20 µA max. (at 3 VDC, 25°C/77°F)
Model H7ET-❑❑P: 15 µA max. (at 3 VDC, 25°C/77°F)
Input* DC Voltage input:
4.5 to 30 VDC at "High" (logic) level
0 to 2 VDC at "Low" (logic) level
(input impedance: approx. 4.7 kΩ)
No-voltage input:
Maximum short-circuit impedance: 10 kΩmax.
Short-circuit residual voltage: 0.5 V max.
Minimum open impedance: 500 kΩmin.
Max. counting speed** H7EC-P (1 kcps): Minimum signal width 0.5 ms
H7EC-LP (30 cps): Minimum signal width 16.7 ms
H7ER-P, -VP (1 kcps): Minimum signal width 0.5 ms
H7ER-V2P (10 kcps): Minimum signal width 0.05 ms
Reset time External reset types: 20 ms
Power-OFF type reset time: 100 ms (with 0 V residual voltage at power OFF)
Gate time (H7ER only) 1 second
■RATINGS
Specifications
* The maximum voltages allowed on the input, count or gate terminals are as follows:
No-voltage models: 3 VDC
DC voltage models: 30 VDC
** ON/OFF ratio 1:1
Noise immunity ±200 V between input terminals with square-wave noise applied by noise simulator
Vibration Mechanical durability: 10 to 55 Hz; 0.75 mm (0.03 in) double amplitude
Malfunction durability: 10 to 55 Hz; 0.3 mm (0.02 in) double amplitude
Shock Mechanical durability: Approx. 30 G
Malfunction durability: Approx. 10 G
Ambient temperature Operating: -10°to 55°C (14°to 131°F)
Storage: -25°to 65°C (-13°to 149°F)
Humidity 35 to 85% RH
Weight Approx. 20 g (1.25 oz)
Approved by the following standards
UL
CSA
CE (EMC)
■CHARACTERISTICS

H7E-P H7E-P
3
Dimensions
Unit: mm (inch)
Note: Mounting hole dimensions conform to the pin
pitch of a standard 28-pin IC socket.
*When machine inserting the H7E❑-❑P, the mounting
holes must be 1.2 mm diameter.
Detailed drawing
of straight
PCB terminal
Mounting footprint
17.3 (0.68)
max.
22.4
(0.88)
44.8 (1.76)
33.02
5.08
3.3 0.6
0.5
5.08
0.6
t=0.3
Base 3.3
0.6
44.8 (1.76)
32.1
8
8.2
22.4
(0.88)
0.3
0.3
15.24
2.54
2.54
Area occupied by counter Eight 0.8-dia
holes*
3.58
15.24
3.58
5.9
5.08
33.02
5.08
5.9
17.3 (0.68)
max.
Eight straight PCB
terminals

H7E-P
H7E-P
4
Connections
■H7EC-P, H7EC-PL, H7ET-P ■H7ER-P, H7ER-VP, H7ER-V2P
Power supply
All H7E❑-❑P models require a 3 VDC external power source.
When designing a circuit, plan the power wiring connections to
be within 50 mm (1.97 in). Refer to the connection diagrams
above for proper wiring polarity.
The life expectancy of a battery power source can be calcu-
lated by the following formula:
t = 1000 A/lc
where, t: life expectancy of battery (h)
A: battery capacity (mAh)
lc: current consumed by H7E❑-❑P (µA)
Voltage division of power source circuit
When necessary, the voltage from the battery may be divided
by resistances:
When doing so, however, ensure that the following equation
balances:
E (V) x R2/ (R1+ R2) = 3V
Allow a current high enough to flow through R1so that the
H7E❑-❑P receives adequate current.
C is a film capacitor, of about 0.1 µF, and is intended to absorb
noise superposed from the power lines.
Keep wiring between the H7E❑-❑P and R2as short as
possible, within 50 mm (1.97 in).
Use a diode (Di) having a forward voltage as small as possible
(0.1 V max. at IFof 1 mA). Determine the ratio of R1to R2in
accordance with the forward voltage of the diode to be used.
Be aware that when the supply voltage of power source E has
dropped to less than the voltage of the backup circuit, the
battery discharges. To protect the circuit against a momentary
power failure, an aluminum electrolyte capacitor can also be
used in place of a battery, as shown below:
When the capacitor is used, its backup time can be calculated
by the following formula*:
t = C(V1-V2)/lc
where, t: Backup time (s)
C: Capacitance (µF)
V1: Supply voltage before power failure (V)
V2: Minimum operating voltage of H7E❑-❑P (V)
lc: H7E❑-❑P current consumption (µA)
*In all applications which require the counter to maintain the
accumulated display for a longer time, increase the capaci-
tance to an appropriate value.
Input connection
Contact input
Backup circuit for protection against power failure

H7E-P H7E-P
5
Use a transistor for input that satisfies the following conditions:
Collector breakdown voltage ≥(Circuit voltage) x 1.2
Leakage current < 5 µA
Amplification factor (hFE)≥50
Use diode (Di) having a forward voltage as small as possible
(0.1 V max. at IFof 20 µA).
Operations
PCB counter power source
Wiring polarity must be carefully observed in order to prevent
permanent damage to the counter. The 28-pin socket has no
provision for preventing the insertion of the counter in a
reversed position. Exercise caution when inserting the counter
in the socket, to prevent reversed polarity.
Wiring
Do not route the count, gate or reset input wiring in the vicinity
of, or in parallel to the wiring of high-voltage or inductive load
circuits (such as motors and relays). Also, keep the wiring as
short as possible.
To prevent unwanted reset when replacing the battery, connect
the new battery before disconnecting the old one. Otherwise,
the voltage 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 much simpler. See
the schematic diagram below:
■SOLID-STATE INPUT OF OPEN-COLLECTOR TRANSISTOR
By open-collector transistor
Replacing battery
By TTL or C-MOS IC

H7E-P
H7E-P
6
■GENERAL INFORMATION
The terminals are solder-plated. Finish soldering the terminals
within 5 seconds, at a solder iron tip temperature of 250°±10°C
(482°F±50°F). Since the counter is not flux-tight, do not use
flux when soldering. Avoid automatic and dip soldering.
Manually solder the counter onto a PC board, and avoid
cleaning as much as possible.
When mounting the counter on a PC board with components
which consume higher current than the counter, place the
counter in the vicinity of the power supply. Avoid placing the
counter in a circuit with power-consuming components. Above
all, never place the count input circuit in a circuit common to
power-consuming components.
Omron Europe B.V. EMA-ISD, tel:[phone], fax:[phone], http://www.eu.omron.com/ema
Cat.No.GC CN4A 6/98/26M Specifications subject to change without notice.Printed in the U.S.A.
NOTE:DIMENSIONS SHOWN ARE IN MILLIMETERS.To convert millimeters to inches,divide by 25.4.