LC2H
Cautions for use
1. Input and output connection
1) Input connection
(1) Contact input
Use highly reliable metal plated contacts.
Since the contact’s bounce time leads
directly to error in the count value, use
contacts with as short a bounce time as
possible. In general, select input to have
a maximum counting speed of 30 Hz.
(2) Non-contact input (Transistor input)
Connect with an open collector. Use
transistors whose characteristics satisfy
the criteria given below.
VCEO = Min. 20 V
IC = Min. 20 mA
ICBO = Max. 6 µA
Also, use transistors with a residual
voltage of less than 2 V when the
transistor is on.
* The short-circuit impedance should be less
than 1 k
Ω
.
(When the impedance is 0
Ω
, the current
coming from the count input terminal is
approximately 5 mA and from the reset
input terminal is approximately 1.5 mA.)
Also, the open-circuit impedance should
be more than 100 k
Ω
.
(3) Input wiring
When wiring, use shielded wires or
metallic wire tubes, and keep the wire
lengths as short as possible.
2) Output connection
Since the transistor output of counter is
insulated from the internal circuitry by a
photo-coupler, it can be used as an NPN
output or PNP (equal value) output.
As NPN output
As PNP output
3
4
1
2
5
6
Reset
input
Count
input
3
4
1
2
Reset
input
Count
input
5
6
3
4
1
2
5
6
Load
Load’s power
supply
3
4
1
2
5
6
Load
Load’s power
supply
2. Self-diagnosis function
If a malfunction occurs, one of the following displays will appear.
* Includes the possibility that the EEP-ROM’s life has expired.
3. Terminal connection
1) When wiring the terminals, refer to the terminal layout and
wiring diagrams and be sure to perform the wiring properly
without errors.
An external power supply is required in order to run the main
unit.
Power should be applied between
terminals (1) and (2). Terminal (1) acts
as the positive connection and terminal
(2) as the negative.
2) After turning the counter off, make sure that any resulting
induced voltage or residual voltage is not applied to power
supply terminals (1) through (2). (If the power supply wire is
wired parallel to the high voltage wire or power wire, an induced
voltage may be generated at the power supply terminal.)
3) Have the power supply voltage pass through a switch or relay
so that it is applied at one time.
Display
Contents
Output
condition
Restoration
procedure
Preset values after
restoration
Err-00
Malfunctioning
CPU
OFF
Enter front
reset key or
restart
counter
The preset value at
start-up before the
CPU malfunction
occurred.
Err-01
Malfunctioning
memory*
0
1
Operating voltage
2
3
4
5
6
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: [email protected]
