View Pdf File PROFIBUS DPASICs

PROFIBUS DP ASICs
Design
ASPC 2
The ASPC 2 is a preprocessing communications chip for master applications with a maximum transmission rate
of 12 Mbit/s. The ASIC has not been disclosed. The brief user manual describes the pins and the electrical
properties of the ASPC 2. A separate microprocessor and the appropriate firmware are required for operation.
The firmware is tuned to the 80C165 processor and can be obtained by purchasing a license.
SPC 3
The SPC 3 is a preprocessing communications chip with a processor interface. The SPC 3 processes message
frame identification, address identification, execution of the data back-up sequences and protocol processing for
PROFIBUS DP.Firmware is offered for the Siemens SPC 3 (see ordering data).
SPC 3LV
The product portfolio for intelligent PROFIBUS slave applications was expanded by a 3.3 V version. The
SPC3LV is 100% compatible in terms of functions and pins to the 5 V version (SPC3).
DPC 31
The DPC 31 is a preprocessing communications module with a processor interface and an integrated processor
core (C31 core).
It supports the connection of intelligent field devices as slaves on PROFIBUS DP and PROFIBUS PA.
The DPC 31 autonomously processes all communications tasks and has, in addition, an integral C31 core for
further applications. It combines the communication properties of the ASICs SPC 3 and SPC 4-2 in one chip.
The integrated C31 core can also be programmed as required. Firmware is offered for the Siemens ASIC DPC
31 (see ordering data).
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Siemens ITS
SPC 4-2
The SPC 4-2 is a preprocessing communications chip with a processor interface. It is designed for combined
applications and due to the Low Power Management function, it is ideally suited to use in intrinsically safe applications.
Firmware is offered for the SPC 4-2 by the company TMG itec 1). The signals are converted for PROFIBUS PA using
the SIM 1-2 module.
1) Order from:
TMG itec
76137 Karlsruhe
Tel. +49 (0)721 82 80 60
SIM 1-2
The SIM 1-2 supplements the SPC 4-2 or DPC 31. Only a few external components are required in addition to these
ASICs to be able to connect field devices to an intrinsically safe network in accordance with PROFIBUS PA. In
combination with the SPC 4-2 or DPC 31, the functions of a PROFIBUS PA slave can be processed from physical
linking through to communication control.
SIM 1-2 supports all send and receive functions (including Jabber Control) as well as the high-resistance decoupling of
auxiliary power from the bus cable. It provides an adjustable, stabilized supply voltage and also supports configuration
of an electrically isolating power supply with just a few passive components.
The ASIC contains a special interface logic which provides a low-overhead, minimum power interface for galvanic
signal separation as an alternative to the standard signal interface.
It can be connected to all Manchester encoders/decoders to the IEC 61 158-2 standard at 31.25 kbit/s.
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Siemens ITS
LSPM 2
LSPM 2 is a single-chip solution with 32 input/output bits. It processes all bus communication autonomously. An
additional microprocessor and firmware are not required. The compact MQFP casing with 80 pins makes it ideal for
applications with low space requirements.
FOCSI
This ASIC functions as an expansion to the existing PROFIBUS ASICs. The FOCSI module (Fiber Optic Controller
from Siemens) ensures proper electrical conditioning and transfer of the received/sent optical signal. To inject the signal
into a fiber-optic conductor, apart from FOCSI, the appropriate optical transmitter and receiver will be required. FOCSI
can be used with the PROFIBUS DP ASICs described above.
Additional ordering data available on request
Technical specifications
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Siemens ITS
LSPM 2
Protocol
SPC 3
PROFIBUS DP PROFIBUS DP
SPC 3LV
DPC 31
PROFIBUS DP
PROFIBUS DP,
PROFIBUS PA
Application range simple slave
application
intelligent slave
application
intelligent slave
application
intelligent slave
application
Transmission rate, 12 Mbit/s
max.
Bus access
in ASIC
Automatic
yes
determination of
transmission rate
12 Mbit/s
12 Mbit/s
12 Mbit/s
in ASIC
yes
in ASIC
yes
in ASIC
yes
Microprocessor
no
required
Scope of firmware not required
yes
yes
integrated
6 to 24 KB
6 to 24 KB
approx. 38 KB
Message buffer
Power supply
Power loss, max.
Permissible
ambient
temperature
Housing
Frame
size1665
Page
5 V DC
0.35 W
-40 °C … +75
°C
1.5 KB
5 V DC
0.5 W
-40 °C … +85 °C
1.5 KB
3.3 V DC
<0.5 W
-40 °C … +85 °C
6 KB
3.3 V DC
0.2 W
-40 °C … +85 °C
MQFP, 80-pin
4 cm2
PQFP, 44-pin
2 cm2 Mar 2008
PQFP, 44-pin
2 cm2
PQFP, 100-pin
4 cm2Siemens ITS
Delivery
quantities (pcs.)
6/66/330/4950
6/96/750/960/4800 5/160/800/1000/48 STEP B:
00
6/60/300/5100
STEP C1:
6/66/660/4620
SPC 4-2
ASPC 2
Protocol
PROFIBUS DP PROFIBUS DP
PROFIBUS FMS PROFIBUS FMS
PROFIBUS PA PROFIBUS PA
Application range Intelligent slave Master application
application
Transmission rate, 12 Mbit/s
12 Mbit/s
max.
Bus access
in ASIC
in ASIC
Automatic
yes
yes
determination of
transmission rate
Microprocessor
yes
yes
required
Scope of firmware 3 … 30 KB
80 KB
Message buffer
3 KB
1 MB (external)
Voltage supply
5 V DC, 3.3 V 5 V DC
Power loss, max.
0.6 W at 5V
0.9 W
0.01 W at 3.3 V
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SIM 1-2
PROFIBUS PA
FOCSI
-
Medium
Attachment
31.25 kbit/s
Medium
Management Unit
12 Mbit/s
-
-
-
-
not required
via bus
0.05 W
not required
3.3 V DC
0.75 W
Siemens ITS
Permissible ambient
temperature
Housing
Frame size
Delivery quantities
(pcs.)
Page 1667
-40 °C … +85 °C -40 °C … +85 °C
TQFP, 44-pin
2 cm2
5/160
-40 °C … +85 °C -40 °C … +85 °C
P-MQFP, 100-pin MLPQ, 40-pin
4 cm2
36 mm2
6/66/660/4620
30/60/1000
Mar 2008
TQFP, 44-pin
2 cm2
40
Siemens ITS