Ediseja 21 CMU 100 / 2.5.1.1 - 17 User manual
CMU 100 - RS485 to 2x RS232 fallbac switch
Content
1 PREFACE.......................................................................................................3
2 CMU 100 SYSTEM.........................................................................................5
2.1 DESCRIPTION..................................................................................................................... 5
2.1.1 SOFTWARE...................................................................................................................... 5
2.1.2 HARDWARE...................................................................................................................... 5
3 RS485 TO 2x RS232 FALLBAC SWITCH..................................................7
3.1 DESCRIPTION..................................................................................................................... 7
3.2 TYPICAL APPLICATION..................................................................................................... 7
3.3 APPEARANCE..................................................................................................................... 8
3.4 HARDWARE DESCRIPTION............................................................................................... 8
3.4.1 MAIN BOARD.................................................................................................................... 8
3.4.2 RS485 INTERFACE BOARD.............................................................................................9
3.4.3 RS232 INTERFACE BOARD...........................................................................................11
4 SCHEMATIC.................................................................................................13
5 INSTALLATION............................................................................................14
5.1 INSTALLATION.................................................................................................................. 14
6 COMMISSIONING & MAINTENACE..........................................................15
6.1 COMMISSIONING.............................................................................................................. 15
6.2 MAINTENANCE................................................................................................................. 15
7 TECHNICAL DATA......................................................................................16
8 DIMENSIONS...............................................................................................18
9 ORDERING...................................................................................................19
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2 CMU 100 / x.5.1.1 - 17 User manual CMUMU511 13.02.2021
CMU 100 - RS485 to 2x RS232 fallbac switch
1 PREFACE
Liability statement
We have chec ed the contents of this manual to ensure that the descriptions of both hardware
and software are as accurate as possible. However, deviations may occur so that no liability can
be accepted for any errors or omissions contained in the information given.
The contents of this manual will be chec ed in periodical intervals, corrections will be made in
the following editions.
We reserve the right to ma e technical improvements without notice.
Contact
If you have any questions or comments related to this product please contact us on:
Ediseja 21 d.o.o.
Stegne 21C
1000 Ljubljana
Slovenia – EU
Tel: 00 386 51 643 411, 051 643 411
Email: grega.flander@ediseja21.com
www.ediseja21.com
Copyright
Copyright © Ediseja 21, 2019. All rights reserved.
Explanation of the symbols
Read the instructions!
Device was tested with 2,5 V or 500 V AC voltage to chec the device
insulation.
Device ground terminal.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC; the affixed
product label indicates that you must not discard this electrical/electronic product in
domestic household waste.
Warnings
In this paper the following terms are used:
Danger
indicates that death, severe personal injury or substantial property damage will result if proper
precautions are not ta en.
Warning
indicates that death, severe personal injury or substantial property damage can result if proper
precautions are not ta en.
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CMU 100 - RS485 to 2x RS232 fallbac switch
Caution
indicates that minor personal injury or property damage can result if proper precautions are not
ta en. This particularly applies to damage on or in the device itself.
General information
These paper contain the information that is necessary for the proper and safe operation of the
described devices. This paper is intended for technically qualified personnel.
Warning!
Hazardous voltage is present inside the device during operation. Disregarding of safety
rules can result in severe personal injury or property damage.
Only qualified personnel may work with described devices after being familiar with warnings and
safety notices in this paper and other safety regulations.
Warning!
Device must operate completely assembled! Device must be used as described. No
modifications of the device should be made.
Warning!
Do not open device while it is energized! Hazardous voltage is present inside the
device. Disconnect all connectors before opening!
Warning!
If device is damaged disconnect it from power supply! Send it to the manufacturer for
inspection.
Warning!
Connect to earth before attaching power supply!
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CMU 100 - RS485 to 2x RS232 fallbac switch
2 CMU 100 SYSTEM
2.1 DESCRIPTION
Communication unit (CMU 100) is modular system of communication devices that can be used
for various of tas s such as:
communication converter (for example RS232 to RS485)
star coupler (for example 1 fiber optic to 7 fiber optics)
repeater (for example RS485/485)
communication isolator (for example for preventing ground loops)
communication listener - debugger
PC serial com port extender (for example USB to 4 serial com)
CMU 100 device is a couple of software and hardware. For different purposes, different software
versions and different hardware configuration have been developed.
2.1.1 SOFTWARE
Software is application dependent and allows different hardware configurations. Software's tas
is switching between communication ports and allows almost any combination between them.
2.1.2 HARDWARE
Hardware is based on main board with power supply and port switching logic. On that board,
interface boards are attached. CMU 100 can handle up to 8 different interface boards. Currently
available interface boards:
RS232
isolated RS485
Multimode Fiber Optic with ST and SMA connectors
Singlemode Fiber Optic with ST, FC & SC connectors
Versatile Lin Fiber Optic 1 mm plastic cable
USB
ethernet (with one virtual com port)
Housing is aluminium and intended for mount on standard DIN 35 rail (acc. to DIN EN 50022). 3
different housings have been made. Depends on how many interfaces device has, appropriate
housing is used.
Hardware settings
All settings on the device can be made from outside by a DIL switch. It is not necessary to open
the housing.
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CMU 100 - RS485 to 2x RS232 fallbac switch
3 RS485 TO 2x RS232 FALLBAC SWITCH
3.1 DESCRIPTION
Fallbac switch is communication device that switches data between two master ports and one
slave port. It is intended to connect one device (RTU) to two master devices (PC).
This device contains one RS485 interface (master) and two RS232 interfaces two (slave) ports.
When data comes to one master port, data is transferred to the slave port. Other master port is
deactivated. At the same time timer starts. During timer delay, data from "first" master port are
transferred to the slave port. Meanwhile other master port is not active. After timer elapses,
deactivated master port is activated again. Slave port is connected to both master ports again. If
data comes to both master ports simultaneously, master port 1 (physical port 2) has priority.
Switch time delay is set with switches at the bottom of the device. Possible timer settings are: no
delay, 20 ms, 40 ms, 60 ms, 80 ms, 0,1 s, 0,2 s, 0,3 s, 0,4 s, 0,5 s, 1s, 1,2 s, 1,5 s, 2 s, 2,5 s, 5
s.
Wide power supply voltage allows connection to all common station batteries. Additionaly it can
be also connected to standard AC voltages.
This device is intended for use in cubicles and cabinets in all inds of power production,
transmission and distribution stations. It requires no maintenace. All normaly used connectors,
switches and light indicators are accessed at the front side of the device. One light indicator
indicates power supply voltage, others indicate communication transfer.
3.2 TYPICAL APPLICATION
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Picture 2: CMU 100 / x.5.1.1 - 1 typical application
CMU 100 - RS485 to 2x RS232 fallbac switch
3.3 APPEARANCE
3.4 HARDWARE DESCRIPTION
This configuration of device is made from main board (power supply, LEDs, switches and logic
witch), one RS485, and two RS232 interface boards.
3.4.1 MAIN BOARD
Power LED indicates that device is turned on. The right LEDs of one port shows activity on
receive (Rx) line and the left one shows activity on transmit (Tx) line.
On the bottom side of device are switches and JTAG connector which is intended for
downloading necessary software. Do not connect anything to that connector.
Additional switches allows echo on each port. Echo can be set on or off for each port.
Switches
Switch 1 2 3 4
No delay OFF OFF OFF OFF
20 ms ON OFF OFF OFF
40 ms OFF ON OFF OFF
60 ms ON ON OFF OFF
80 ms OFF OFF ON OFF
0,1 s ON OFF ON OFF
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Picture 3: CMU 100 / x.5.1.1 - 1 front view (left) & bottom view (right)
CMU 100 - RS485 to 2x RS232 fallbac switch
Switch 1 2 3 4
0,2 s OFF ON ON OFF
0,3 s ON ON ON OFF
0,4 s OFF OFF OFF ON
0,5 s ON OFF OFF ON
1 s OFF ON OFF ON
1,2 s ON ON OFF ON
1,5 s OFF OFF ON ON
2 s ON OFF ON ON
2,5 s OFF ON ON ON
5 s ON ON ON ON
Default position
(1 s)
OFF ON OFF ON
Ports Configuration
Port 1 2 3 4
Interface RS485 RS232 RS232 /
3.4.2 RS485 INTERFACE BOARD
Description
Single, galvanically isolated, half duplex, RS485 port with Phoenix 3 pin screw connector, with
automatic switch to receive after end of transmission and with additional terminating and
stabilizating resistors.
Hardware settings
For proper functioning of that board some settings must be done:
RS485 bus termination and stabilisation
baud rate
RS485 bus termination and stabilisation
TERMINATION
At high transmission rates or long distance, RS485 bus termination is necessary.
The termination on RS485 bus must be set on both ends of the RS485 bus.
STABILISATION
Some device, to wor properly, demands that RS485 must always be in nown and valid state.
That is, when + (positive) pin is more than 200 mV positive than – (negative) pin. Pins + and –
are sometimes mar ed as A and B. In case that no device on RS485 bus is transmitting or in
case of short circuit, there is no voltage difference between those pins and some device do not
wor correctly.
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CMU 100 - RS485 to 2x RS232 fallbac switch
On this port board so called „true fail-safe“ RS485 chip is used so board wor s correctly without
stabilisation at invalid RS485 bus state. But still switches for stabilisation are provided on port
board. The stabilization on RS485 bus may be set on one device only!
Switches at the lower side of connector:
Switch 4 5 6
Description RS485 stabilisation RS485 termination RS485 stabilisation
Switches at the upper side of connector:
BAUD rate
bit/s Switch
Interface 5 Interface M Interface L 1 2 3
19200 4800 300 OFF OFF OFF
38400 9600 600 OFF OFF ON
57600 19200 1200 OFF ON OFF
115200 38400 2400 ON OFF OFF
BAUD rate setting 19,2 bit/s is valid for all standard communication protocols, that do not
request special timings. If special protocols (small request-respond time required) are used
please note it in order.
NOTE! If there are problems with communication, try using higher speed setting. Some
manufacturer have different markings for B and A line. Try to switch A and B wires. See
http://en.wikipedia.org/wiki/RS-485 for detailed information.
Connector pin table
MSTB 1 2 3
Description GND - (B) + (A)
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Picture 4: RS485 BUS schematic
CMU 100 - RS485 to 2x RS232 fallbac switch
3.4.3 RS232 INTERFACE BOARD
Description
Single, nonisolated, full duplex, RS232 port with DB9 female connector. Supported Rx, Tx and
GND pins.
Connector pin table
DB9 F 2 3 5
Description RX TX GND
Direction IN OUT -
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Picture 6: Standard data rate vs cable lenght
Picture 5: RS485 interface board appearance with switch settings
CMU 100 - RS485 to 2x RS232 fallbac switch
5 INSTALLATION
5.1 INSTALLATION
Warning!
Hazardous voltage is present inside the device during operation. Disregarding of safety
rules can result in severe personal injury or property damage.
Only qualified personnel may work with described devices after being familiar with warnings and
safety notices in this paper and other safety regulations.
Following instruction must be taken into consideration:
The device must be accessible to qualified personnel only.
The device is permitted to operate in enclosed housing or cabinet only.
The device location must be vibration-free.
The admisible operating temperature must be observed.
Chec the device for damage at unpac ing. If device is damaged it must not be installed
but it should be send to the manufacturer for repair.
The device should not be opened.
The device should be mounted on a 35 mm rail (acc to EN 50022).
Attach ground wire before attaching power supply. Device must be grounded during
operation!
Single core or stranded wire 0,5 – 2,5 mm2 must be used for power supply connection. If
stranded wire is used, ferrules must be used to prevent fraying. Recommended stripping
lenght is 5 mm.
Protective earthing wire must be terminated with tinned copper ear terminal.
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Picture 9: left. installation, right: deinstallation
CMU 100 - RS485 to 2x RS232 fallbac switch
6 COMMISSIONING & MAINTENACE
6.1 COMMISSIONING
Warning!
Hazardous voltage is present inside the device during operation. Disregarding of safety
rules can result in severe personal injury or property damage.
Only qualified personnel may work with described device after being familiar with warnings and
safety notices in this paper and other safety regulations.
Following instruction must be taken into consideration:
Device must operate completely assembled! Device must be used as described. No
modifications of the device should be made.
Attach ground wire before attaching power supply. Device must be grounded during
operation!
Chec if the power supply voltage complies with device operation voltage.
Do not open device while it is energized! Hazardous voltage is present inside the device.
6.2 MAINTENANCE
The device is maintenance-free. Disconnect power supply before cleaning it. Use moist cloth.
Do not use liquids.
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CMU 100 - RS485 to 2x RS232 fallbac switch
7 TECHNICAL DATA
Power supply
CMU 100 / 2... CMU 100 / 8... CMU 100 / 4...
Rated voltage DC 110 - 250 V 48 - 60 V 24 V
AC 230 V 48 V /
Permissible voltage range DC 88 - 350 V 38 - 72 V 18 - 36 V
AC 70 - 264 V 30 - 50 V /
Input current DC 11 - 8 mA 24 - 22 mA 50 - 33 mA
AC 14 mA 30 mA /
Fuse (internal) 2 A T
Power supply indicator green LED mar ed PWR
Voltage dips 20 ms
Connector type screw type „MSTB“ Phoenix 2pin
Power Supply Wire
crossection 0,5 – 2,5 mm2
type single or stranded wire
voltage rating 500 V
colour see valid standard
Ground wire crossection Cu, 2,5 mm2
colour see valid standard
Communication port RS485 (interface type 5, M & L)
Type RS485
Direction half duplex
Speed*
Interface type 5 19,2 - 115,2 bit/s
Interface type M 4,8 - 38,4 bit/s
Interface type L 300 - 2400 bit/s
Distance up to 1200 m
Isolation 1000 V DC
Connector type „MSTB“ Phoenix 3pin
Termination 120 Ohm
Max number of devices
on RS485 bus 32
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CMU 100 - RS485 to 2x RS232 fallbac switch
Communication port RS232 (interface type 1)
Type RS232
Direction full duplex
Speed* up to 230 bit/s
Distance up to 15 m
Isolation none; (GND earthed)
Connector type DB9 female
Lines in 1 (Rx)
Lines out 1 (Tx)
* slowest interface defines device's maximum speed
Other data
Weight approx. 0,35 g
Dimensions
(see picture)
(H) (D) (W)
105 mm 111 mm + connectors 55 mm
Temperature range 0 °C to +55 °C
Humidity operating up to 95 % (noncondensing)
Enclosure Material Al
IP 20
Mount type standard DIN 35 rail (acc. to DIN EN 50022)
Class I
Overvoltage category III
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CMU 100 - RS485 to 2x RS232 fallbac switch
9 ORDERING
ORDERING NUMBER: CMU 100 / c . c . c . c . c . c . c . c . c - c . c
Mother Board + Enclosure + :
Power supply: DC 110 - 250 V or AC 230 V
2 ports converters (no echo possible, mar Function as 0) ............................................... 1
2 to 8 ports converters, star couplers, ... (echo possible) .................................................. 2
Power supply: DC 48 - 60 V or AC 48 V
2 ports converters (no echo possible, mar Function as 0) ............................................... 7
2 to 8 ports converters, star couplers, ... (echo possible) .................................................. 8
Power supply: DC 24 V
2 ports converters (no echo possible, mar Function as 0) ............................................... 3
2 to 8 ports converters, star couplers, ... (echo possible) .................................................. 4
(Device width: 2 ports - 40 mm, 3 ports - 55 mm, 4 - 8 ports - 85 mm)
Interfaces: (up to 8 ports; if more than 8 ports are needed see CMU 200 devices)
None ........................................................................................................................ leave empty
RS232 noisolated, Rx & Tx support (up to 230 bit/s, 15 m) ......….......................................... 1
RS232 nonisolated, Rx & Tx support (custom made: LDU version with rectifiers) ….............. C
RS485 isolated, half duplex (19,2 bit/s – 115,2 bit/s, 1200 m) ….......................................... 5
RS485 isolated, half duplex (4,8 bit/s - 38400 bit/s, 1200 m) .............................................. M
RS485 isolated, half duplex (300 bit/s – 2400 bit/s, 1200 m) …............................................... L
Versatile (650 nm) fiber optic for 1 mm plastic connector (up to 40 bit/s, 110 m) ................. P
Multimode (820 nm) fiber optic with ST connector (up to 2,048 Mbit/s, 500 m) …................... 6
Multimode (820 nm) fiber optic with SMA connector (up to 2,048 Mbit/s, 500 m) .................... 7
Singlemode (1310 nm) fiber optic with SC connector (up to 2,048 Mbit/s, 20 m) .................. S
Singlemode (1310 nm) fiber optic with FC connector (up to 2,048 Mbit/s, 20 m) .................. T
Singlemode (1310 nm) fiber optic with ST connector (up to 2,048 Mbit/s, 20 m) .................. U
USB (one virtual com port) ....................................................................................................... 8
Ethernet 10/100Base-TX port server with one virtual com port (100 m) .................................. 9
Ethernet 100Base-TX (to be used with F and G interface only) (100 m) ................................. E
Ethernet 100Base-FX multimode (1300 nm, 2000 m) (to be used with E interface only) ........ F
Ethernet 100Base-FX singlemode (1310 nm, 20 m) (to be used with E interface only) ........ G
Function:
Converter 2 ports (when Mother Board mar ed as 1, 3 or 7 is used) .......................................... 0
Converter 2 ports, 4 groups (4 independent channels) …............................................................. 7
Star coupler (1 master, 2 to 7 slaves) …..................................................................................... 12
Star coupler (1 master, 4 to 6 slaves, 1 listener) ….................................................................... 14
Star coupler (2 masters, 2 to 6 slaves) …..................................................................................... 5
Star coupler (3 masters, 3 to 5 slaves) …..................................................................................... 9
Fallbac switch (1 master, 2 to 7 slaves) …................................................................................. 17
Node ….......................................................................................................................................... 8
Software Version:
Software version ................................................................................................................. leave empty
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CMU 100 - RS485 to 2x RS232 fallbac switch
Additional accessories (order if needed):
- power supply cable with „schu o“ plug, 2 m
- RS232 cable to PC (state the lenght up to 15 m)
- fiber optic cables (state the lenght)
List of the most common devices:
2 ports converters
Port 1 Port 2 Detail Type
RS232 RS485 300-2400 bit/s, high voltage power supply CMU 100 / 1.1.L - 0
RS232 RS485 4800-38400 bit/s, high voltage power supply CMU 100 / 1.1.M - 0
RS232 RS485 19200-115200 bit/s, high voltage power supply CMU 100 / 1.1.5 - 0
RS232 FO SM SC connector, 20 km, high voltage power supply CMU 100 / 1.1.S - 0
RS232 FO SM FC connector, 20 km, high voltage power supply CMU 100 / 1.1.T - 0
RS232 FO SM ST connector, 20 km, high voltage power supply CMU 100 / 1.1.U - 0
RS232 FO VL versatile link plastic fiber optic, high voltage power supply CMU 100 / 1.1.P - 0
RS232 ETH 10/100 Mbit/s, virtual com port, high voltage power supply CMU 100 / 1.1.9 - 0
RS485 FO MM ST connector, high voltage power supply CMU 100 / 1.5.6 - 0
RS485 FO SM SC connector, 20 km, high voltage power supply CMU 100 / 1.5.S - 0
RS485 FO SM FC connector, 20 km, high voltage power supply CMU 100 / 1.5.T - 0
RS485 FO SM ST connector, 20 km, high voltage power supply CMU 100 / 1.5.U - 0
RS485 FO VL Versatile link plastic fiber optic, high voltage power supply CMU 100 / 1.1.P - 0
RS485 ETH 10/100 Mbit/s, virtual com port, high voltage power supply CMU 100 / 1.5.9 - 0
FO MM RS232 high voltage power supply CMU 100 / 1.6.1 - 0
FO MM FO SM SC connector, 20 km, up to 2,048 Mbit/s, high voltage
power supply
CMU 100 / 1.6.S - 0
FO MM FO SM FC connector, 20 km, up to 2,048 Mbit/s, high voltage
power supply
CMU 100 / 1.6.T - 0
FO MM FO SM ST connector, 20 km, up to 2,048 Mbit/s, high voltage
power supply
CMU 100 / 1.6.U - 0
FO MM ETH 500 m, 820 nm, 10/100 Mbit/s, virtual com port, high
voltage power supply
CMU 100 / 1.6.9 - 0
ETH TX ETH FX 100 Mbit/s, 1300 nm, ST connector, 2000 m range, high
voltage power supply
CMU 100 / 1.E.F - 0
ETH TX ETH FX 100 Mbit/s, 1310 nm, ST connector, 20 km range, high
voltage power supply
CMU 100 / 1.E.G - 0
3 ports star couplers / converters / nodes
Master Slave 1 Slave 2 Detail Type
RS232 RS485 FO MM 19200-115200 bit/s, high voltage power supply CMU 100 / 2.1.5.6 - 12
RS232 FO MM FO SM high voltage power supply CMU 100 / 2.1.6.S - 12
FO MM RS232 RS485 19200-115200 bit/s, high voltage power supply CMU 100 / 2.6.1.5 - 12
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20 CMU 100 / x.5.1.1 - 17 User manual CMUMU511 13.02.2021
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