The command I/O for the LC8 is available in two different configurations, NPN (sink type) and PNP (source type):
9 OPERATION
WARNING
1) Never access or touch terminals and switches while energized. It may lead to electric shock.
2) Never touch any moving part of the actuator when it is powered up or operating. This may lead to injury.
CAUTION
1) Do not touch the driver radiator and motor for some time after power has been disconnected, as they heat up
when energized. It may lead to a burn.
2) Immediately stop the operation in the event of failure. There is a possibility of electric shock, injury and fire.
3) Check the rotating direction before connecting with other devices. It may cause injury and damage.
10 MAINTENANCE INSPECTION
DANGER
Do not overhaul the product, it could lead to fire and electric shock.
Check the voltage using a tester, more than 1 minute after the power is turned off before commencing
any wiring and inspection.
CAUTION
Ask SMC for repair. This product may become inoperable if disassembled.
10.1 General
It is important to perform regular maintenance inspections of the LC8 positioning driver, to optimise its
performance and safe operation. Please familiarize yourself with the information given below, this will enable you
to perform the maintenance inspections in a safe and proper manner.
Before performing an inspection it is important to ensure that the power to the positioning controller is switched
off/disconnected to avoid the risk of electric shock.
Do not touch the circuits inside the positioning driver.
Avoid performing an inspection while the positioning driver is in operation, as the heat sink may become quite hot
during operation.
Disassembling the controller may cause it to malfunction.
If a fault is detected during the inspection, contact your nearest SMC service department as soon as possible.
11 GENERAL EMC PRECAUTIONS
Noise Considerations
The "-Q" version of the LC8 Positioning Driver has been designed and tested to meet the emission and susceptibility
requirements of the CE (European Economic Area) without the aid of external filters. This compliance is based on
following the instructions in this manual for installing and wiring the LC8.
Noise Sources
Two types of noise will affect the LC8 positioning driver and all other electronic devices, radiated noise and
conducted noise.
Radiated noise is electromagnetic interference (EMI) that travels through the air and couples to the circuits and/or
cables of the LC8. Radiated noise is always present but generally at harmless levels. Circuits and cables can act
as antennas and as amounts of noise increase, signals traveling in the circuits and cables can have enough noise
coupled to them that the signal is lost in the noise. Very large amounts of EMI can even damage components.
Power equipment and cables can be unintentional sources of radiated noise. Radio equipment is designed to be a
source of radiated noise.
Conducted noise is electrical noise that travels through wires. This kind of noise is also always present but usually
harmless. Conducted noise problems are usually associated with power supply and grounding issues. If there is an
extreme amount of noise on the AC power lines it can pass through the filtering built into the LC8 and have a
negative effect on the circuit. The LC8 positioning driver has been tested to make sure that it is not susceptible to
normal amounts of radiated and conducted noise and also to make sure that it is not a significant source of radiated
or conducted noise.
Noise Suppression/Prevention
The following guidelines will insure robust performance:
A. General noise reduction
- Avoid bundling power cables (motor and power) and control cables together.
- Use shielded or twisted pair cables for control cables whenever possible.
- Ground the LC8 positioning driver and its actuator together at one point or a ground plane (metal enclosure).
B. Reduce EMI of other instruments and devices
- Use surge absorbers on the noise sources (such as magnetic contactors, AC relays, AC valves, etc) to reduce
noise.
- Separate noisy equipment or devices from the LC8 positioning driver. Maintaining the maximum physical
distance can be an effective method to reduce radiated noise couplings.
- Signal cables (I/O, encoder, communications) should be routed away from power cables. Version 1.02
C. Improve noise immunity in high noise environments
- Install ferrite filters on the encoder and signal lines (as well as RS-232 lines during setup and testing).
- Ground the shields of the encoder and the control signal lines with cable clamp fittings (Pclips).
D. Optional components to improve noise immunity
- Power Line Filter
Recommended part numbers:
Tokin GT Series or equivalent
- Ferrite EMI suppressor: The noise immunity of the driver can be improved by filtering the noise with clamp-
on ferrites on the Encoder, Command I/O and RS-232 cables. Locate ferrite beads as close as possible to the
source of noise to minimize radiation. Ferrite beads can be attached to cables with tie wraps or heat-shrink
tubing.
Recommended part numbers:
Steward 25A2029-0A2 (Typ. 300. @300Mhz)
Steward 25B0735-000 (Typ. 243. @300Mhz)
Steward 28A2029-0A2 (Typ. 209. @100Mhz)
Steward 28B0735-000 (Typ. 201. @100Mhz)
or equivalent
- Ferrite EMI filter for multi-axis communication cables
Recommended part number:
Fair-Rite 0443166651 or equivalent
11.1 Conforming standards
12 EUROPEAN CONTACT LIST
SMC Corporation
Country
Telephone
Country
Telephone
Austria
(43) 2262-62 280
Italy
(39) 02-92711
Belgium
(32) 3-355 1464
Netherlands
(31) 20-531 8888
Czech Republic
(420) 5-414 24611
Norway
(47) 67 12 90 20
Denmark
(45) 70 25 29 00
Poland
(48) 22-548 50 85
Finland
(358) 9-859 580
Portugal
(351) 22 610 89 22
France
(33) 1-64 76 1000
Spain
(34) 945-18 4100
Germany
(49) 6103 4020
Sweden
(46) 8-603 12 00
Greece
(30) 1- 342 6076
Switzerland
(41) 52-396 3131
Hungary
(36) 23-511 390
Turkey
(90) 212 221 1512
Ireland
(353) 1-403 9000
United Kingdom
(44) 1908-56 3888
Websites
SMC Corporation
www.smcworld.com
SMC Europe
www.smceu.com
Standard
Description
EN 55011
Conducted RF Emissions
EN 61000-3-2
Harmonics
EN 61000-3-3
Flicker
EN 61000-4-2
Electro Static Discharge
EN 61000-4-3
Radiated RF Susceptibility
EN 61000-4-4
Electrical Fast Transient
EN 61000-4-5
Surge
EN 61000-4-8
Magnetic Field Immunity
EN 61000-4-11
Voltage Dips & Variations
LC8 - TF109GB
Model Number
LC8-B
N-
-
LC8-B
P-
-
Command I/O Input
+24V common, 24VDC ± 10%, Min.6mA
PLC GND common, 24VDC ± 10%, Min.6mA
Command I/O Output
NPN open collector (sink type),
PNP open collector (source type),
24VDC ± 10%, Max.80mA
24VDC ± 10%, Max.80mA
Leakage Current
Less than 10
µ
A
Internal Voltage Drop
Less than 0.8V
PLC Power Supply
24VDC ± 10%
PNP Command I/O
NPN Command I/O
6mA MIN
24VDC ±10%
80mA MAX
6mA MIN
80mA MAX
24VDC ±10%
