Omron H7E Manual page 28

Note that the above calculation provides an approximate value,
which varies depending on the environment under which the Counter
is used and also on the type of capacitors used. Provide some allow-
ance in selecting capacitors.
Keep the wiring between the H7E@-N@P and R
possible (within 50 mm).
Input Connections
Input Connection Contact Input
Relay
Reset input
Or
When the H7EC-NP is used, relay chattering may be counted. Use
the H7EC-NLP, one of the low-speed input models.
Operation
■ Operating Modes
H7EC Total Counter
Incrementing Operation
(Up)
Reset
Count input
Counting display values
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Flush Mounting
H7EC-N@P
Flush Mounting
H7ET-NP
C-34
PCB-mounting Counters
or C as short as
2
Relay
H7E@-N@P
Count/Timer input
Or
Full-scale
(Full-scale
1)
DIP terminal x 8
17.3 max.
43
H7E@
-N@P
Solid State Input
Open-collector Transistor Input
H7E@-N@P
Reset input
TTL or C-MOS IC Input
TTL or C-MOS IC
Reset input
Use a transistor for input that satisfies the following conditions:
Collector breakdown voltage
Leakage current < 1 A
Use a diode (D) having a forward voltage as small as possible (0.1 V
max. at I of 20 A).
F
H7ET Time Counter
Incrementing Operation
(Up)
Reset
Timer input
Internal clock
timer value
Timer display values
DIP Terminal PCB Processing Dimensions
(Soldering Surface)
Base
Count/Timer input
TTL or C-MOS IC
H7E@-N@P
Count/Timer input
50 V
Full-scale
(Full-scale
0.1
Section occupied
by the Counter
Eight, 0.8 dia.
Note: Processing dimensions are
for 28-pin IC socket.