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Block Diagram CU4-SOPRANO
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Feature Summary CU4-SOPRANO
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Form Factor
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Single size CompactPCI style Eurocard (100x160mm2), front panel width 4HP (20.3mm)
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Serial Interfaces
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Asynchronous, serial protocol: 1 start bit; 7 or 8 data bits; 1 or 2 stop bits;
optional even/odd parity; standard bit rates RS-232E up to 230.4 kbps
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Quad PCI UART OX16PCI954, compatible with 16C550 (and in addition 16C450,
16C650, 16C750, 16C950), FIFO 1/16/128 Byte, automatic software flow control
(XON/XOFF), automatic hardware flow control (CTS/RTS, DSR/DTR)
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RS-232E or RS-485 (EIA/TIA-485) full-duplex (RxD/TxD) individually selectable
for each port, dual-mode transceiver SP334 (up to 230.4kbps with RS-232,
921.6kbps and above with RS-485), 2kV ESD protection
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4 x RJ45 8-pos. I/O connectors in the front panel, integrated status LED display
for RxD/TxD/RTS/CTS, external adapter RJ45 to DB9 available as accessory
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Optional 4 x 10-position pin headers P1-P4, dual-row 2 x 5, 2.54mm pitch,
suitable for optional attachment of a flat cable assembly with a DB9 connector
at the opposite end (PC COM Port compatible when RS-232 is selected)
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Additionally all UART ports available as buffered TTL signals across
CompactPCI J2 connector for external transition-board CU9-BASE and PHY modules
CU7/CU8 (option only, J2 must be omitted for 64-bit CPCI bus slots)
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Serial drivers for Microsoft® Windows® 98/ME/NT4/2000/XP available by download
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Parallel
Interface
(Option)
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Optional pin header 2x13 position, 2.54mm pitch, for optional attachment of a
flat cable assembly with a DB25 connector at the opposite end
(PC DOS LPT port compatible)
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- Complies with IEEE-1284 EPP parallel port standard
- Drivers for Microsoft® Windows® 98/ME/NT4/2000/XP available by download
- Special board version CU4-P-SOPRANO available with front panel LPT printer port connector D-Sub 25
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CompactPCI®
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CPCI bus master 32-bit 33MHz, +5V VIO interface (blue keying on J1 connector)
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Rear I/O (Option)
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Optional J2 connector for attachment of a rear I/O transition module CU9-BASE
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Power Requirements
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+5V ±5% 0.4A max.(optional consumption of external PHY-modules not included)
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Thermal Conditions
Environmental Conditions
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Operating temperature range 0°C ... +70°C (industrial temperature range on request)
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Storage temperature range -40°C ... +85°C, max. gradient 5°C/min
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Humidity 5% ... 95% RH non condensing
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Altitude -300m ... +3000m
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Shock 15g 0.33ms, 6g 6ms
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Vibration 1g 5-2000Hz
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EC Regulations
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EN55022, EN55024, EN60950-1 (UL60950-1/IEC60950-1)
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2002/95/EC (RoHS)
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MTBF
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350,000h
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specifications are subject to change without further notice
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Assembly Drawing CU4-SOPRANO
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The quad UART is equipped with a flexible bit rate generator, which can be
matched with a variety of oscillator frequencies for virtually any Baud rate.
By default, the CU4-SOPRANO provides a 1.8432MHz oscillator.
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Several UART
registers affect the prescaler (CPR), the divisor and the sampling rate (TCR).
It is the task of the drivers to manage these registers adequately.
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Selected Oscillator Options
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Oscillator
(MHz)
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CPR (Prescaler)
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Clock effective
(MHz)
(MHz)
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max. Baud rate
CPR=1 TCR=16
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max. Baud rate
CPR=1 TCR=4
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1.8432
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0x08 (1)
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1.8432
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115,200
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460,800
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3.6846
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0x10 (2)
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1.8432
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230,400
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921,600
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7.3728
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0x20 (4)
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1.8432
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460,800
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1,843,200
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14.7456
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0x40 (8)
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1.8432
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921,600
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3,686,400
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18.432
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0x50 (10)
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1.8432
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1,152,000
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4,608,000
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50.000
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0xd9 (27.125)
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1.8433
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3,125,000
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12,500,000
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With an effective clock of 1.8432MHz and the sampling register TCR containing
a value of 16, the typical Baud rates of a PC COM port can be achieved with the
following divisor register values:
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Selected Baud Rates
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DLM:DLL
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Baud rate
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0x0001
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115,200
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0x0002
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57,600
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0x0003
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38,400
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0x0004
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28,800
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0x0006
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19,200
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0x000c
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9,600
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0x0018
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4,800
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0x0030
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2,400
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0x0060
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1,200
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0x00c0
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600
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0x0180
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300
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0x0300
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110
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0x0900
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50
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RJ1..RJ4 (Front Panel)
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RS-232
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RJ1..RJ4 Pin #
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RS-485
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DSR
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1
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do not use
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DCD
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2
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do not use
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DTR
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3
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do not use
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GND
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4
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GND
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RXD
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5
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RXD -
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TXD
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6
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TXD +
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CTS
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7
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RXD +
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RTS
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8
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TXD -
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External adapters from RJ45 to DB9 plug (male) or receptacle (female) are
available, which are pre-assembled for custom configuring. By means of a pliers
or inserting tool, the jumper wires from the RJ45 jack are ready to be pushed
into the appropriate spot on the DB9 connector. The adapter itself must be
connected to the corresponding RJ(1..4) jack of the CU4-SOPRANO. A suitable
cable requires all 8 leads wired up straight forward 1:1. A short Ethernet
patch cable could be used (avoid cross over patch cables, or old 4-wire Ethernet
cables, or ISDN cables).
A male DB9 connector is required to emulate the serial RS-232 interface (COM port)
of a desktop PC. The adapter must be wired up according to the scheme below. Due
to one missing signal line, the modem-signal RI (Ring Indicator) is not available
across the RJ45 jacks.
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In order to connect the CU4-OPERA to a desktop PC, an adapter with a female DB9
connector can be directly attached to the COM port of the PC. The wiring scheme
of the adapter emulates a null-modem cable. A typical configuration is shown in
the diagram below.
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There is no explicit standard in use for RS-485 across DB9 connectors, instead
several proprietary solutions coexist. If the above adapter wiring scheme for
RS-232 with a male DB9 would be used
also for RS-485, the assignment of the differential signals can be derived from
the diagram below:
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Adapters RJ45 to D-SUB (also 15- or 25-position) are available from several
distributors, but can also ordered directly from EKF. Please note, that the
adapters are preassembled kits only, which must be configured (strapped) by the
customer itself to fit his requirements. For volume quantities, please contact
EKF in order to receive a quote on ready to use configured adapters.
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Is RS-485 a two-wire ore a three-wire system? It is most definitely a three wire system
(four plus one wire with respect to full-duplex operation).
The TIA standard (ANSI/TIA/EIA-485-A, page 15, A.4.1) requires the presence of a common return path between
all circuit grounds along the balanced line for proper operation.
The TIA standard defines a maximum common mode voltage range from -7V to +12V
on the signal lines A and B, measured against C (common ground). A TIA/EIA-485
system however with only two wires A and B (C generator and C receiver commons
not connected) can result in an unpredictable common mode voltage superimposed
on the interface lines A and B, caused either by electrostatic charging or
electromagnetic interference.
A 2-wire system often may work though due to
idle-line fail-safe resistors at the receiver inputs,
which can be considered as a loosely coupled common ground. Nevertheless this
operation mode cannot be recommended - what is working flawless in the laboratory
may not work reliable under real conditions in an industrial environment.
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Where do we get the third wire? Many times the outer cable shield is used as the
third (fifth) wire. However, EKF recommends to use a two pair cable (three pairs
for full-duplex operation), with one or both wires of the additional pair as the
dedicated common ground. With respect to the wiring diagram above,
connect these additional wires directly to the pin 5 of the DB9 connector for proper grounding.
As an alternate, use a cable which provides an inner shield for each signal twisted pair.
The inner shield can then be used for establishing the common ground between
TIA/EIA-485 nodes.
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Transceiver Schematics CU4-SOPRANO for a Single RS-232 Port
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Transceiver Schematics CU4-SOPRANO for a Single RS-485 Port
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The configuration of RS-232 or RS-485 is individually selectable for each serial port.
When in RS-485 mode, the drivers may be enabled by RTS low, DTR low or fixed selection.
A jumper set on position JSER 1..4 configures the respective serial interface
port transceiver to the RS-485 modus. A jumper removed forces the corresponding
transceiver to the RS-232 mode.
Only when in RS-485 mode, the jumper positions JSER 5..6 are significant.
Normally both jumpers 5 and 6 are removed. This enables permanently the
differential line drivers, which is the suitable condition for the full-duplex
transfer mode (also known as point-to-point or 2-point connection, both nodes
can simultaneously send and receive data).
If more than two nodes are connected to a common bus, this operation mode is
called RS-485 half-duplex (AKA party-line, only one node is allowed to send).
The RxD and TxD lines are connected together in the party-line mode. A software
protocol is required in order to pass a token to the active node, which sets its
status signal RTS or DTR adequately. Jumpers JSER 5/6 are provided to control
the behaviour of the RS-485 transmitters, in accordance to the settings in
the driver software, either enabled by RTS, or DTR, or permanently
enabled/disabled.
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Jumper JSER
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JSER 5
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JSER 6
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RS-485 Transmitters
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removed
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removed
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permanently enabled
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installed
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removed
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enabled by RTS
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removed
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installed
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enabled by DTR
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installed
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installed
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permanently disabled
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Configuration Jumper JSER - Selection RS-232 or RS-485 Mode
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The rear-I/O connector J2 is stuffed as an option only. In order to avoid potential
conflicts, before installing the CU4-SOPRANO with the J2 populated, ensure that
the system is not equipped with a P2 CompactPCI 64-bit expansion backplane.
Otherwise, permanent damage to the board or to system components could occur.
The signal assignment of the optional J2 connector matches the transition board
CU9-4-BASE. Across the transition board, rear-I/O PHY-modules of the CU7/CU8
series may be attached by means of a flat cable.
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Rear-I/O Assembly CU9-4-BASE
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The TTL signals from J2/P2 are routed across the rear-I/O transition boards
CU9-2-BASE or CU9-4-BASE to its shrouded pin headers H13..H16. By means of a short flat
ribbon cable, the PHY modules CU7-RS485 or CU8-RS232 are attached.
Up to four PHY modules
CU7-RS485 and
CU8-RS232 can be mounted at the 3U/12HP
back panel of the CU9-2-BASE (CU9-4-BASE provides a 8HP back panel and is therefore
preferred by most customers).
Available as a special version CU4-P-SOPRANO, the board is provided with a
front panel printer port connector. This board version is not equipped
with serial I/F transceivers and connectors, and hence is suitable solely as
legacy parallel LPT port, aka Centronics printer I/F. The parallel port complies
with the IEEE-1284 EPP parallel port standard. Drivers for Microsoft® Windows®
are available by download.
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CU4-P-SOPRANO - Special Version w. Front Panel LPT Connector
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Ordering Information |
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Ordering Number
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Short Description
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CU4-1-SOPRANO
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3U, CompactPCI quad serial interface, configurable alternatively as RS-232 or
RS-485 (individually selectable by jumper), serial port connectors mounted in
the front panel, w/o J2 connector, suitable for front panel I/O
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CU4-2-SOPRANO
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Similar to CU4-1-SOPRANO, with J2 connector, suitable for rear I/O
(J2 rear I/O backplane required)
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CU4-P-SOPRANO
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Special version of the board, front panel LPT printer parallel port,
no serial I/F available
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CR9-5-ADAPT
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Front panel 6U expansion adapter, mounting kit
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CU7-1-RS485
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RS-485/RS-422 Rear-I/O PHY module, 1 Port, 2.5Mbps, 2-wire half-duplex
(party line network), optically isolated, including flat cable assembly
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CU7-2-RS485
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RS-485/RS-422 Rear-I/O PHY module, 1 Port, 2 x 2.5Mbps, 4-wire full-duplex
(point to point connection), optically isolated, including flat cable assembly
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CU8-1-RS232
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RS-232E rear-I/O PHY interface module, including flat cable assembly
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CU9-4-BASE
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Transition board, interconnection between CU4-SOPRANO (J2) and rear-I/O PHY
interface modules, 4 ports, 3U/8HP back panel included
(custom specific back panels on request)
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261.92.009.01
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Adapter, RJ45 jack to male D-Sub connector 9-pos.,
customer configurable, suitable e.g. for COM-port emulation
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261.91.009.01
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Adapter, RJ45 jack to female D-Sub connector 9-pos.,
customer configurable, suitable e.g. for null-modem emulation
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