DRW160897AB
Serial Converter Module
SCM SERIES
I N S T R U C T I O N M A N U A L
SCM-US
SCM-38I
(USB/Serial Converter)
(RS232C/RS485 Converter)
Thank you for choosing our Autonics product.
Please observe all safety considerations for safe and proper product operation to avoid hazards.
symbol represents caution due to special circumstances in which hazards may occur.
Warning Failure to follow these instructions may result in serious injury or death.
Caution Failure to follow these instructions may result in personal injury or product damage.
Warning
prevention devices, etc.)
Failure to follow this instruction may result in malfunction and damage on the product or PC.
Caution
Proper Usage
TX_Enable signal(RTS signal)
In case of SCM-38I and SCM-US48I, Tx_ Enable signal (RTS signal) is automatically generated
according to protocol.(Do not need to generate signal on your own)
Auto-loop Back
SCM-38I has Auto-look Back function. When using Auto-loop back function, please use as 'RS232C'
cable connections.
Termination Resistor
RS485 Communication has many advantages such as fast transmission rate, long distance
communication and etc. But if the impedance of transmission line does not match to RS485 network
cause transmission error.
Features
SCM-US
SCM-38I
RS232C
RS485
Isolating RS485 Transceiver
specifically designed to connect
(2500VRMS)
to Autonics products.
Built-in protection circuit
Tx-Enable signal (RTS signal)
is automatically generated
98/98SE/ME/2000/Server
2003/XP/Vista/7
noise reduction
compatible
indicating LED
1
1: Some products requires the dedicated converter cable(EXT-US, sold separately).
Model
SCM-US
SCM-38I
1
Power supply
5VDC USB bus power
12-24VDC
Power consumption
Approx. 1W
Approx. 1.7W
Max. com. speed
2
1,200 to 115,200bps (recommended: 9,600bps)
Communication type
Half duplex type
Available com.
1.5m (not extension)
Max. 1.2km
distance
Multi-drop
-
Max. 31 multi-drop
Data bit
-
5-bit, 6-bit, 7-bit, 8-bit
Protocol
Stop bit
-
1-bit, 2-bit
Parity bit
-
None, Odd, Even
USB: USB 2.0 A type
RS232C: D-sub 9-pin
(male)
Connection type
Earphone Jack
3
RS485: 4-wire screw terminal
(4 pole stereo phone plug)
(2-wire communication type)
Isolation type
Non-isolation
Isolation
Between whole terminals
and case: 2000VAC
50/60Hz for 1 min
Dielectric strength
-
Between RS232C
and RS485: 2500VAC
50/60Hz for 1 min
Isolation resistance
-
±500V the squre wave noise(pulse width: 1 ) by
Dielectric strength
-
the noise simulator
Mechanical 0.75mm amplitude at frequency of 10 to 55Hz in each X, Y, Z direction for 1 hour
Vibration
Malfunction 0.5mm amplitude at frequency of 10 to 55Hz in each X, Y, Z direction for 10 min
Mechanical 300m/s²(approx. 30G) in each X, Y, Z direction for 3 times
Shock
Malfunction 100m/s²(approx. 10G) in each X, Y, Z direction for 3 times
Ambient
-10 to 55 , storage: -20 to 60
temperature
Environ-
ment
Ambient
35 to 85%RH, storage: 35 to 85%RH
humidity
Approval
Accessory
-
Approx. 80g
Approx. 106g
4
Weight
(approx. 41g)
(approx. 46g)
1: USB bus Power is supplied from PC or USB host controller.
2: Protocol and Communication speed are set by Hyper terminal. DAQMaster, ParaSet, Modbus
Poll. When communicating with Autonics products, set communication speed to 9,600bps.
3: Some products requires the EXT-US(converter cable, sold separately).
4: The weight includes packaging. The weight in parentheses is for unit only.
Environment resistance is rated at no freezing or condensation.
Panel Mounting
SCM-38I & SCM-US48I
Multi-layer
M3 screw bolt
Panel
There is no Serial Port in SCM-US48I.
Dimensions
1. SCM-US
LED
1
. O.P.R (redLED) : POWER
2
. A.C.C (green LED) : Rx/Tx Data Transmission
SCM-US48I
(USB/RS485 Converter)
EXT-US (converter cable, sold separately)
8.8
4.9
2. SCM-38I
3. SCM-US48I
USB 2.0 AB type cable (accessory)
USB 2.0 AB type cable is enclosed and also sold separately.(Model: USB AB CABLE)
USB B
Type
SCM-US48I
USB
RS485
Connection and Installation
Isolating RS485
Transceiver(2500VRMS)
1. SCM-US
Applicable OS: Windows
98/98SE/ME/2000/Server
2003/XP/Vista/7
Built- in ferrite core USB 2.0 AB
cable for noise reduction
Both USB1.1, USB 2.0
compatible
Power supply ON/OFF
indicating LED
Easy to connect with PC
Built-in protection circuit
Computer
SCM-US48I
1: Some products requires the dedicated converter cable(EXT-US, sold separately) to connect SCM-
US. Do not apply excessive force to the converter cable. It may cause damage to the unit. Do not
1
±10%
5VDC USB bus power
bend cable and connector part. It may cause damage to the unit.
Approx. 1W
2. SCM-38I
USB: Max. 1m±30%
A B V G
RS485: Max. 1.2km
USB: USB 2.0 B type
(male)
When wiring the RS485 connector, use AWG 24 cable and tighten the connector screw with a
tightening torque of 0.22 to 0.4N . m with the screwdriver for M2 screw.
Between whole terminals
and case: 2500VAC
50/60Hz for 1 min
Between USB and
RS485: 2500VAC
50/60Hz for 1 min
R×D-R×D
T×D-T×D
GND-GND
RS232C Cable
Computer
Standard connection
Computer
DCD
USB 2.0 AB type cable
DSR
RXD
(length: 1m)
RTS
Approx. 197g
TXD
CTS
(approx. 34.5g)
DTR
RI
GND
3. SCM-US48I
USB 2.0
B Type (male)
Computer
When wiring the RS485 connector, use AWG 24 cable and tighten the connector screw with a
Number of
"A" size
"B" size
tightening torque of 0.22 to 0.4N . m with the screwdriver for M2 screw.
layers (N)
(23N+0.5)
(23N-3)
1
23.5mm
20mm
2
46.5mm
43mm
3
69.5mm
66mm
4
92.5mm
89mm
52
40.3
Ø2.5×4P-1.5m
1 2
VCC
R×D
12
18
8
200
19.7
3-Ø4
38
75.5
81.7
3-Ø4
38
75.5
1,000
±30
USB A
Type
±5
20
±5
20
EXT-US
(converter cable,
sold separately)
Serial
USB 2.0
A Type (male)
USB
SCM-US
Autonics and KONICS products
PC loader port
G: GROUND
V: 12-24VDC input
ON: Using terminating resistance
B(-)
RS485 signal line
OFF: Not using terminating resistance
A(+)
GND
VCC
Terminating
(12-24VDC)
resistance
RS232C
RS485
A(+)
B(-)
A(+) B(-)
A(+) B(-)
B(-)
RS485
RS485
RS485
...
DEVICE
DEVICE
DEVICE
ON
OFF
#1
#2
#30
A(+)
Using Auto-loop Back
SCM-38I
Computer
DCD
DSR
RXD
RTS
TXD
CTS
DTR
RI
GND
Terminating
resistance
USB
RS485
A(+) B(-)
A(+) B(-)
A(+) B(-)
B(-)
RS485
RS485
RS485
DEVICE
DEVICE
DEVICE
#1
#2
#30
ON
OFF
A(+)
Driver Installation (SCM-US, SCM-US48I)
(unit: mm)
This Driver Installation shows the procedure for Windows XP. There might be some differences in the
1. USB Driver Installation
1) Visit our website (www.autonics.com) to download 'SCM-US USB Driver' or 'SCM-US48I USB
Driver'.
2) Unzip download 'SCM-US.zip' or 'SCM-US48I.zip' at any directory.
3) When connecting product with USB port, 'Found New Hardware Wizard" will appear automatically.
T×D
'Do you want to search software by connecting 'Window Update'?. Click 'No' button and the following
GND
(Advanced)' and click 'Next'.
4) Select 'Search for best driver in these locations' and 'include this location in the search' continuously.
Click the 'Browse' button.
5) When 'Browse Folder' window is displayed, select 'SCM-US\Driver' and click 'Finish'. Click 'Next' to
proceed with the USB Driver installation.
6) Hardware installation message will appear while Found New Hardware Wizard is running.
Click 'Continue Anyway' to proceed with installation.
7) The following window will be displayed if the USB Driver is installed properly. Click the 'Finish' button.
If USB port is changed, reinstall the USB driver.
2. Serial Port Driver Installation
1) After installing USB Driver, Serial Port (COM port), 'Found New Hardware Wizard' will appear (Serial
Port Driver installation follows the same procedures described in installing USB Driver).
The following window will be displayed for 'Search and installation options'
3) Because a driver location was selected when installing USB driver, click 'Next' button.
1
4) Hardware installation message will appear while Found New Hardware Wizard is running.
Click 'Continue Anyway' to proceed with installation.
5) 'Completing the Found New Hardware wizard' will be displayed if the Serial Port Driver is installed
properly. Click the 'Finish' button.
Verify that drivers were installed properly with the
and Serial Port Driver installation.
Open the folder [My computer], open the system
folder (click right), click the hardware tab, and click
the device manager button. Then, make sure that
'SCM-US Serial Port (COM ) ' or 'SCM-US48I
Serial Port (COM )' is found in 'Port (COM and
LPT)' and 'SCM-US Driver(Autonics Corp)' or 'SCM-
US48I Driver(Autonics Corp)' is found in 'Common
Serial Bus Controller' category.
ON
OFF
Caution During Use
B(-)
RS485
1. Follow instructions in 'Cautions during Use'. Otherwise, it may cause unexpected accidents.
DEVICE
2. 24VDC power supply should be insulated and limited voltage/current or Class 2, SELV power supply
#31
A(+)
device.
3. Use only designated connector and do not apply excessive power when connecting or disconnecting
the connectors.
4. Keep away from high voltage lines or power lines to prevent inductive noise.
shielded wire at input signal line.
Do not use near the equipment which generates strong magnetic force or high frequency noise.
5. Do not connect or disconnect the USB cable, earphone jack, or RS485 cable quickly and repeatedly
while communicating.
It may cause damage or malfunction of the product and PC.
SCM-38I
6. After supplying power, connect with the communication output product. When disconnect,
7. When connecting multiple SCM-US or SCM-US48I units to a PC, number of COM port goes up in
sequential order and it takes some time to identify and assign number of COM port.
8. When connecting the RS485 communication output product, connect the terminating resistance (100
9. Use twist pair wire for RS485 communication. If not, use A(+) and B(-) cables in the same length.
10. Use USB cable of designated standard, and do not use extension cable.
11. This unit may be used in the following environments.
Altitude max. 2,000m
Pollution degree 2
Installation category I
B(-)
RS485
Major Products
DEVICE
#31
A(+)
Photoelectric Sensors
Temperature Controllers
Fiber Optic Sensors
Temperature/Humidity Transducers
Door Sensors
SSRs/Power Controllers
Door Side Sensors
Counters
Area Sensors
Timers
Proximity Sensors
Panel Meters
Pressure Sensors
Tachometers/Pulse(Rate)Meters
Rotary Encoders
Display Units
Connectors/Sockets
Sensor Controllers
Switching Mode Power Supplies
Control Switches/Lamps/Buzzers
I/O Terminal Blocks & Cables
Stepper Motors/Drivers/Motion Controllers
Graphic/Logic Panels
Field Network Devices
Laser Marking System(Fiber, CO , Nd:YAG)
Laser Welding/Cutting System
18, Bansong-ro 513beon-gil, Haeundae-gu, Busan,
South Korea, 48002
TEL: 82-51-519-3232
sales@autonics.com
DRW160897AB
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