Triguard SC300E
MSR04XI
Serial Communications Module
RS232
(MSR04XI
Issue 8
INTRODUCTION AND TEC
HNICAL DATA
PURPOSE
The Serial Communications Module provides a serial interface between the SC300E
environment
one Serial Communications Module must be used in the system and fitted in Slot 10 of the
main
workstations.
ladder
be fitted to any other I/O slot, ‘wrong slotting’ is prevented by mechanical coding blocks (Figure
2-1 ). The system software identifies the module via a built-in hardware identifier.
and a variety of remote devices complying with the standardRS232-C. At least
chassis to enable communications between the system processors and the
The workstation link is used for loading the application software and monitoring
and diagnostic functions. The link utilises Port 0 of the module. Additional modules can
October 2005
)
Circuit triplication and voting procedures make the module single fault tolerant and front panel
indicators show Tx/Rx activity, the circuit on-line status and the health of the module.
Communications
these
connections are duplicated on the field connector (J2) at the rear. A fifth port is for
diagnostic purposes only. The module is compatible with ‘single slot hot repair’ and the front
panel has a switch to enable a request that the module be taken off line.
This document is intended to provide a general understanding of the function of Serial
Communications Module, sufficient to enable basic maintenance operations to be effected in
the
field.
conne
ctions are via four identical ports on the front panel (Ports 0 to 3) and
008-5099
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Ejector lever
User COMMports
Diagnosticport
(Voltage Mon)
Link LK2
echanical
M
(Upper)
Connector J1
(Module ID)
Link LK2
oding
c
lock
b
Link LK4
Tx / Rx LEDs
Health LED
ON/OFF LEDs
ON/OFF Line
Request switch
Ejector lever
Connector J2
RS232 Daughterboard
Mechanical coding block
(Lower)
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ASSOCIATED DOCUMENTATION
Reference No
008-5097
SPECIFICATION
Model
Communications
Mictrocontroller
Communication ports:
rate. Isolation
Chassis User Manual
MSR04XI
Serial RS232
Intel family
Port 0: RS232 9600 or 19200 Baud
Port 1:
Port 2: RS232 9600 or 19200 Baud (see Note)
Port 3: RS232 9600 or 19200 Baud (see Note)
Diagnostic:
Ports
rate.
Ports 0 to 3, 1kV
RS232
for diagnostics purposes only
2 & 3 must be set to the same Baud
Title
9600 or 19200 Baud
Note
:
Indicators
Hot repair procedure
Module power consumption
Overall size (mm)
Overall size (inches)
Weight
Tx, Rx, Health, 3 x On Line
Single slot
3.5W
400(9U)H x 397L x 28W
15.75H x 15.63L x 1.1W
1.3kg
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ENVIRONMENTAL SPECIF
The maximum ambient temperature measured at the hottest point within the Triguard system
shall not be greater than 60 degrees centigrade.
Temperature operating:
Temperature storage:
Humidity
EMC/RFI
Vibration/Shock
Certification:
General Certification: Ref. SC300E Product Guide (ref 008-5209)
Immunity
ICATIONS
+5°C to +60°C
-
25°C to +70°C
5% to 95% non-condensing at ambient <40°C
Tested and certified to IEC 1131-Part 2 1994
Tested and certified to IEC 1131-Part 2 1994
TRANSPORT AND HANDLING
The MSR04XI module must be transported and stored in its original packing material which
should be retained for this purpose.
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TECHNICAL DESCRIPTIO
N
PHYSICAL
The Serial Communications Module is a 9U high PCB with integral front panel and front and
rear
connectors; a plug-in daughter board carries the RS232 interface circuits. Figure 1-1
shows the general layout, location of the connectors and front panel components.
Mechanical coding blocks
All Input/Output modules carry two mechanical coding blocks equipped with pins which mate
with
holes in corresponding blocks in the chassis and prevent the module being inserted into
the wrong slot. The pins in the module blocks are factory installed in a
the module and corresponding set screws are removed from the chassis coding blocks to
enable
block configuration for this module is shown in Figure 2-1
fitting. Unused holes are plugged with set screws. The chassis mechanical coding
.
pattern determined by
Figure 2-1 Chassis mechanical coding block configurations
Links
The PCB has a total of nine links. For the top section of the PCB the links are located and
configured as follows:
Three LK1 links (3-pin) located approximately 80mm down from the top ofthe module, not user
configurable,
Three LK2 links (8-pin) located approximately 210mm down from the top of the module Module ID links which should always be fitted (refer to Figure 1-1).
link not fitted.
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On the lower section of the PCB are three further links, LK2, LK3 and LK4, located and
configured as follows:
LK2 (2-pin) located approximately 220mm down from the top of the module and 110mm in from
the
front face, used in the voltage monitoring circuit, always fitted.
LK3 (3 factory fitted hard wired, all pins linked for 3-2-1 mode.
LK4 (3-pin) located approximately 250mm down from the top of the module and 220mm from
the
pin) located beneath the plug in daughterboard. Used for 3-2-1-or 3-2-0 operation,
front face, used for the daughterboard clock speed setting, pins 1 and 2 linked.
LK1 (3 off x 3 pin)
LK2 (3 off x 8 pin)
LK2 (2 pin)
LK3 (3 pin)
LK4 (3 pin)
Table 2-1. Default link settings
Link
Default setting
Links not fitted
Hard wired (all pins linked)
Fitted (pins 1 & 2 link
Fitted
Fitted
ed)
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EXTERNAL CONNECTIONS
Pinouts and signals for front panel connectors J4 to J6 through to J2 backplane are given in
Table 2-2.
Is your interface DTE (data terminal equipment) or DCE (data communications equipment)?:
The
Transmit and receive leads (2 or 3) can be reversed depending on the use of the equipment,
either
Port 0
(9-way)
point of reference for all signals is the terminal (or PC).
DTE or DCE.
1
2
3 Tx
4
5 Ground
Table 2-2. Front panel & backplane connector pinouts with signals
(backplane
Rx
J2
n/c
A4
C2
n/c
A6
Port 1
(9-way)
1
2
3 Tx
4
5 Ground
Rx
J2
(backplane)
n/c
A12
C10
n/c
A14
6
7 RTS
8 CTS
9
Port 2
(9-way)
1
2
3 Tx
4
5 Ground
6
7 RTS
8 CTS
9
n/c
n/c
Rx
n/c
n/c
n/c
A2
C4
n/c
J2
(backplane)
n/c
A20
C18
n/c
A22
n/c
A18
C20
n/c
6
7 RTS
8 CTS
9
Port 3
(9-way)
1
2
3 Tx
4
5 Ground
6
7 RTS
8 CTS
9
n/c
n/c
Rx
n/c
n/c
n/c
A10
C12
n/c
J2
(backpl
n/c
A28
C26
n/c
A30
n/c
A26
C28
n/c
ane)
n/c =No connection
Wiring schematic for serial communication cables are shown in Figure 2-2
.
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Figure 2-2 Serial communications cable wiring
THEORY OF OPERATION
Triplicated data enters and leaves the module (Figure 2-3 ) via the chassis backplane
connector
loaded into dual port RAM in each of the three circuit branches and is voted 2-oo-3 before being
passed
communications port.
Data received at th
RAM
the
set
of
The four communications ports are configured to run in full duplex mode using an RS232
interface and having a maximum rate of 19200 Baud. The communications ports are isolated
from
module.
distances.
J1
and is isolated from the MPP by bus transceivers. Dat a for transmission is
to
the USARTs on the daughter board where it is serialised and sent to the appropriate
e ports is converted to parallel form by the USART and written to dual port
in
each branch, the data is accompanied by information about the status of the ports and
embedded microprocessor. The dual port memory is then read by the MPP via a second
transceivers.
the module circuits by opto-isolators and connected t
The ports are capable of powering modems or line drivers for transmission over long
o field connector J2 at the rear of the
Power for the module circuits is derived from the dual redundant SC300E power supply units,
individual auctioneering and regulating circuits supplying various logic areas. The
communications port opto-isolators and interfaces also have separate supplies.
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Figure 2-3
Serial communications module –
Block diagram
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SERVICING
SCOPE
CAUTION: 1
The module contains components that may be electrostatically sensitive, it should be
transported and stored in its original packaging material.
System repair is by module replacement. Faulty modules are not repairable in the field; they
should
be
returned for repair.
DIA
GNOSIS
The TriBuild workstation is used for fault diagnosis. In the case of an Input/Output fault the
Health LED on the faulty module will be extinguished.
REMOVAL AND REPLACEMENT
CAUTION 2
Failure to take the faulty module off-line before removing it from the chassis could trigger a fault
alarm
or
cause plant shutdown.
CAUTION 3
When inserting a module ensure that it is aligned with the markings on the chassis rails and
that
it
engages with the upper and lower guides. Improper insertion may cause damage tothe
module and/or chassis connectors.
Operate the On/off Line Request switch on the faulty module, the three On Line LEDs should
all extinguish to indicate that the MPPs have recognised the request and taken the module off
line.
Slacken the two module securing screws and use the black ejection levers (top and bottom) to
draw
the module from its slot.
Insert the new module ensuring that it engages properly in the upper and lower guides in the
chassis, the top and bottom chassis rails carry alignment marks to assist. Pull out the
ejection levers and as the module is pushed back engage the levers on the chassis rails. The
levers
should then be used to draw the module into position, some resistance will be felt as the
rear
connector pins engage. The module should be fixed in position with the securing screws.
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Operate the On/off Line Request switch and check that the three On Line LEDs illuminate for
one second, extinguish for one second and then illuminate permanently to indicate that the
module has been put on-line. If the LEDs do not illuminate either the first or second time or fail
to remain illuminated, then the module must be considered faulty.
PREVENTIVE MAINTENAN
No preventive maintenance is necessary.
CE
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SERVICE SUPPORT
SPARE PARTS
Spare parts and technical advice can be obtained from your local area office
.
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