23.5.3 Distribution Unit
The Distribution Unit can either be a Sensor Multiplexer Unit
(SMU) including an SMU Board or a Distributed Control Unit
(DCU) including both an SMU Board and a DCU Board.
SMU and DCU
The SMU is a microprocessor based measuring unit, designed for
continuous operation in harsh environmental conditions. It acts
as an interface between sensors and a DCU. The SMU can
measure both analog and digital sensors. It stores data of one
measurement at a time to its SRAM memory. The data is trans-
mitted from the memory to the host processor by a separate
command. The SMU also performs linearization of temperature
sensors and error check-ups.
The SMU is connected to the host processor through one serial
line channel. This channel is a galvanically isolated RS-485
half-duplex connection and each SMU has its own address to
which it responds.
A DCU comprises an SMU Board and a DCU Board on the lid
of the enclosure. These boards are connected to each other with a
flat cable. In addition to the features of the SMU the DCU Board
adds a more powerful microprocessor, flash memories, a PC Card
socket and a CAN controller.
POWER
STATUS
CAN
FLASH
RESET
VAISALA
VAISALA
SMU
DCU
Fig 23-21
030304A9525
23
Instrumentation and Automation
32-200115/II
23-28
WÄRTSILÄ 32
Summary of Contents for VASA 6L32
Page 4: ......
Page 18: ...Appendix B Welding Precautions 200640 00 6...
Page 26: ...01 Main Data Operating Data and General Design 32 200634 01 01 8 W RTSIL 32...
Page 60: ...Appendix A Environmental Hazards 200507 02A 10...
Page 68: ...Page 7 7 Document No 4V92A0645 Rev j...
Page 84: ...03 Start Stop and Operation 32 200402 04 03 12 W RTSIL 32...
Page 98: ...04 Maintenance Schedule 32 200623 01 04 14 W RTSIL 32...
Page 154: ...07 Tightening Torques and Use of Hydraulic Tools 32 200643 01 07 30 W RTSIL 32...
Page 162: ...08 Operating Troubles Emergency Operation 32 200402 01 08 8 W RTSIL 32...
Page 164: ...Specific Installation Data 2005 01 09 2...
Page 178: ...10 Engine Block with Bearings Oil Sump and Cylinder Liner 32 200150 10 14 W RTSIL 32 34SG...
Page 216: ...Appendix A Testing of cylinder tightness 32 200142 A 4 W rtsil 20 32 34...
Page 226: ...13 Camshaft Driving Gear 32 200546 02 13 10 W RTSIL 32...
Page 254: ...15 Turbocharging and Air Cooling 32 200549 10 15 20 W RTSIL 32...
Page 274: ...16 Injection System 32 200627 01 16 20 W RTSIL 32...
Page 280: ...Fuel System 32 200508 07 17 6 W RTSIL 32...
Page 314: ...19 Cooling Water System 32 200050 19 14 W RTSIL 32...
Page 394: ...23 Instrumentation and Automation 32 200115 II 23 60 W RTSIL 32...