Technical data

46
©
FuG Elektronik GmbH, D-83135 Schechen, Am Eschengrund 11
http://www.fug-elektronik.de, E-Mail: [e-mail]
V 0913
General:
The modular interface system
PROBUS V allows to connect
FuG- power supplies with vari-
ous interfaces and bus-
systems.
The PROBUS V system consist
of two assemblies, the ADDA
module and an interface con-
verter respectively.
The ADDA module is an intelli-
gent analog-digital and digital-
analog converter for controlling
the power supply. This part is
always in the power supply and
communicates by a serial ASCII
protocol via optical fibres with
the interface converter. It evalu-
ates the programmed com-
mands, controls the power sup-
ply by reference voltages and
makes available serially the
feed back data of the power
supply .
The ADDA module stores also
all calibration data and all unit
specific data.
All commands and read-back-
data are transmitted between
these both modules as readable
ASCII characters.
For customer specific multi-
channel-units up to 256 ADDAs
can be used parallel by optical
fiber hub or can be used serial
by a optical fiber chain. Every
single ADDA-module of the
group can be addressed by sub
-addressing. (Not for Profibus
DP)
Options and modifications:
Probus V (digital interface system)
Design example
Interface converter
Profibus DP
ADDA - module
Connection to the customer is
made by the Interface Con-
verter, which converts the sig-
nals of the respective bus sys-
tem or interface standard to the
serial data stream of the optical
transfer line.
Available versions:
 IEEE 488
 RS 232 electrical or optical
 RS 422
 USB
 Profibus DP
 LAN (Ethernet)
 More on request
Every version can be integrated
completely into the power sup-
ply or delivered with an external
interface converter. In the last
case the connection is via opti-
cal fibre cables. The external
interface converters are Euro
Cassettes of 61mm width (12U),
133mm (3U) high and 170mm
deep. The fibre optic cable from
the external interface converter
to the power supply can be up to
30m long (plastic optical fibre) or
in special design more than
1000m (glass fibre).
Furthermore, an external ver-
sion with electrical connections
to the power supply via the ana-
log programming is also possi-
ble.
Features:
 Easy programming with
SCPI-like syntax; Standard
set of commands compatible
to previous version PROBUS
IV.
 Extended set of commands
for special functions.
 Most modern RISC-Microcon-
troller techniques with SMD.
 Completely digitally adjusted
for highest precision.
 Isolation between interface
converter and ADDA compo-
nent via optical fibre, though
extremely immune against
interferences.
 More than one ADDA compo-
nents addressable in one
optical fibre chain.
Technical data:
 Instruction processing time
approx. 300µs (without serial
data transfer time)
 At 625kBd at least 1000 set-
tings per second programma-
ble (typ. 2000/sec)
 Up to 100 measurements per
second
 Two outputs 0..+/-10V, effec-
tive resolution 14 to 20 bit
incl. sign (depending on inte-
gration time), theoretical res-
olution 24 bit.
 Setting time of outputs
<500us
 Tc < 1x10
-5
/K, typ. 3ppm/K
 Two inputs 0..+/-10V, pro-
grammable resolution, max.
22 bit incl. sign, input imped-
ance >1GΩ
 Several digital I/Os for control
of the power supply
 Optical connectors: Standard
Agilent (HP) HFBR-0500
series. Optionally HFBR-0400
series.
 When several ADDA modules
are connected to a fibre optic
chain, then an additional time
delay depending on the se-
lected baud rate and the
string length is necessary.
For 625kBd approx. 1ms
delay per ADDA module must
be added.
IEEE 488:
 Delay time of the data trans-
fer: <100us.
 Baud rates on the serial side
of the optical link: 38400Bd or
625kBd selectable.
 SRQ (Service Request) pro-
grammable.
 LED indicators for "ad-
dressed" und "SRQ" condi-
tions.
 Together with ADDA com-
monly compatible to the IEEE
-488 mode of the predeces-
sor PROBUS IV.
 IEEE-488 address selectable
by switch near the IEEE-488
connector (outside the unit).
RS 232 electrical (active):
 Own power supply, 3-wire
connection sufficient (Rx, Tx,
GND).
 Baud rates up to 115200Bd
possible.
 Connector: 9-pol. Sub-D.
 Together with ADDA com-
monly compatible to the RS-
232 mode of the predecessor
PROBUS IV.
 Optical connectors: Standard
Agilent (HP) HFBR-0500
series. Optionally HFBR-0400
series.
RS 232 optical (passive):
 Equal to RS 232 active, but:
 Optical connectors: Direct
sticking connection for stand-
ard 1mm POF optical link.
 Includes 5m fibre optic cable
to connect the power supply
to the computer.
 Fibre optic cables up to 30m
on request. (Longer version
available as special cables,
glass fibre up to 1000m)
 The complete interface con-
verter is housed in a Sub-D-
connector-like case.