M4780 MODBUS Indicator

CYLINDER 1

CYLINDER 2

CYLINDER 3

CYLINDER 4

CYLINDER 5

CYLINDER 6

CYLINDER 7

CYLINDER 8

TURBO INLET

TURBO OUTLET

LOW OIL PRESS.

HIGH WATER TEMP.

OVERSPEED

LOW FUEL LEVEL

VIBRATION

START FAIL

AUX. VALVE 1

AUX. VALVE 2

AUX. VALVE 3

AUX. VALVE 4

LAMP TEST

MODBUS INDICATOR M4700

SIREN RESET

Fig. 1. Communication with a PLC.

The SELCO M4700-80 is a versatile microprocessor based indicator panel to be used with direct potential free contacts, SELCO alarm annunciators and the SELCO H0300 Event Logger or in PLC systems.

• Simplifiesindicationsincontrol panels and switchboards

• Completeunitforflushmountinginstandard instrument size 144 x 144mm

• 20programmableLEDs• LEDcolourchangethroughplug-in

system• Theblanklegendcardcanbetypedor

printed to suit. A Word template is provided

• BothdirectinputsandRS485buscommunication

•RS485interfaceforfield-bus communication

•StandardMODBUS-RTUprotocol• Multipleunitscanbeconnectedtothe

bus• Cablelengthupto1000metresonthe

bus• Equippedwithalarmrelay,sirenrelay

and built-in siren• Twointegratedpushbuttons,onefor

lamp test and one for siren reset• Quickinstallationbymeansofclampingfittingsandplug-interminalblocksforeasyservice

ApplicationTheM4700-80MODBUSIndicatorprovides an ideal solution for clear indications at local or remote locations.

As the traditional SELCO indicator panels, the M4700-80 has direct connections to potential free contacts.

Additionally,itisequippedwithaserialRS485communicationbuswithonly2wires. The indications of the unit can be controlled via this serial bus as well as from the direct connections. The controls via the bus can be made from any device capable of operating as a MODBUSmaster,e.g.aPLC,aPCor the SELCO H0300 Event Logger.

Fig. 2. Connection Diagram.

Fig. 3. Function Diagram.

Theindicatorpanelisalsoequippedwith an alarm relay, a siren relay and a built-in siren.

M4700-80 supports the standard MODBUSprotocol(RTUmode),forcommunicationontheRS485bus. Alarm inputs, control of the relays, sirenandtheindicationsoftheLEDscanbecontrolledviasimpleMODBUScommands. For instance, the unit has commandsforquickflash,slowflash,shortflashpulses,steadylightornolightontheLEDs.Whenusedinalarmsystems,aquickflashingLEDwilltypicallyindicatefirstnewalarm.SlowflashingLEDswillindicatethefollowingnewalarms.Shortflashpulseswillindicate cable error. Steady light will indicateacknowledgedalarms,andnolight will indicate normal state.

Via the bus it is also possible to reset the siren,thesirenrelayandallLEDs.AnLEDtestcanbeperformedandthe LEDscanbedimmedfrom0to100%.This feature is particularly useful in ship applications where the panels are placed on the bridge.

FunctionM4700-80has20programmableLEDson the front and two additional ones: “PWR”toindicatethatpowerisonand“RUN”toindicatecommunicationwiththe unit.

AtextdescriptionfortheLEDscanbeprintedontheblanklegendcard, situated between the two covers at the front. The card can be taped onto a sheet of paper, to enable printing. SELCO provides a Word template for doing this in an easy manner.

AdirectconnectionfromREFtotheterminal with similar number as the indicator channel will illuminate the equivalentLED.REFcanbeselectedas0VDCor+24VDCviaajumper(JP1)behindthefrontplate(factorysettingofthisjumperisleftpositionwhichwillgive0VDCandrightpositionwillgive+24VDC).Thealarmandsirenrelaysare also activated, and the built-in siren will give an audible alarm.

PressingtheSIRENRESETbuttonwillrelease the siren relay and cancel siren. The relay and the siren are activated, wheneveranewalarmoccurs(providedSIRENRESEThasbeenactivated).Thealarmrelayisactivatedbythefirst

incoming alarm and remains energized whilst an alarm is operational.

Behindthefrontplateisajumper(JP2),adjacenttothesiren,whichwilldisablethe siren, when removed.

Viathe2-wireRS485itisalsopossible toseta“virtualinput”.A“virtual input”hasexactlythesamefunctionasthe physical inputs and the “virtual inputs”shouldbeunderstoodasbeingin parallel with the physical inputs. This means that if a physical input or a “virtualinput”isset,theM4700-80will

react according to the function diagram showninfigure3.

The LAMP TEST push button provides illuminationofallLEDs.FromthefrontpanelitisalsopossibletoadjustthebrightnessofthefrontpanelLEDsbysimultaneous activation of both the LAMPTESTandSIRENRESETpushbuttons.Dimmingcanbedonein5consecutive levels.Connectionsforthepowersupply(24VDC),theinputsandtheRS485interfacearedone on the rear panel. The cable length on the bus can be up to 1000 metres.

POWER 24V DC-

+

CHAN. 13

CHAN. 20

CHAN. 11

CHAN. 12

IN 20

IN 13

IN 11

IN 12

ALARMRELAY

SIRENRELAY

CHAN. 10

CHAN. 3

CHAN. 2

IN 10

IN 3

IN 1

IN 2

CHAN. 1

REF

B

COM

A

NO

NC

COM

NO

NC

COM

RS485

M4700-80

ALARM RELAY

SIREN RELAY

RESET

INPUT channel 2

INPUT channel 1

On the rear panel are also two rotary dials for selecting the baud rate used for communicationontheRS485bus.Theavailablebaudratesare1200,2400,4800,9600,19200or38400.Furthermore, these dials are used for setting the unit’s device address, to be used when communicating on the bus.

Baud RateThedefaultBaudRateis9600baud.However, this can be changed as follows on the two rotary dials SW1 and SW2:

• SetSW1to“F”inordertobringthepanelintoconfigurationmode.Thisisnow indicated on the front panel by theflashing“RUN”LED.

• FindthesettingofSW2accordingtorequiredbaudrateinthetablefigure5.

• SetSW2totherightsettingand observe on the front of the panel that thesettingisindicatedontheLEDaccording to the above table.

• SetbackSW1atadifferentsetting than“F”andobservethatthe“RUN”

LEDstopsflashing,indicatingthattheunitisnowconfigured.

Device AddressThe device address can also be set on SW1andSW2.Thedeviceaddressissetas a hexadecimal value.

Note:When the device address is set, thesettingofSW1on“F”shouldbeavoided, as this would again bring the panelintoconfigurationmodeforchanging the baud rate.

Deviceaddress0shouldalsobe avoided, as this address is used for broadcast messages, i. e. messages to be sent to all panels on the bus at the same time.

Example: The device address should be set to 30 (1Ehexadecimal).SetSW1on“1”andSW2on“E”.

Event Logger H0300The SELCO H0300 Event Logger logs alarms and events from multiple SELCO alarm annunciators and indi cator panels, connectedtoacommon2-wireRS485bus. The H0300 can survey and log events with related date and time from up to 63 units. TheH0300canalsobeconfiguredtoactas an event repeater. The application showninfig.4describessuchasystem.AlarmsfromtheEngineRoomarerepeatedontheBridge,intheMessRoom,intheCaptain’sCabinandthe

Engineer’s Cabin. For more information seetheH0300DataSheet.

MODBUS ProtocolTheMODBUSprotocolisacommonandwidely used protocol for communication on various types of networks.

ThefollowingMODBUSfunctionsareavailableontheM4700-80(hex):

Readbit :01&02Readwords :03&04Writebit :05Write word : 06Quick-read8bits :07Write words : 10

The read functions can be used from the PLC, for instance, to read the state of the siren or the state of one or more LEDs.Thewritefunctionscouldbeusedto set the state of the siren or one or moreLEDs,oritcouldbeusedtoseta“virtualinput”asdescribedearlier.

After specifying the function, the data bytesshouldbespecified.Thefirstdatabytesspecify,forinstance,theLEDsinquestiontoreadortosetorperhapswhethertoperformanLEDtest.

Some of these data bytes specify the following(hex):

0001 StateofLED10002 StateofLED2 0009 StateofLED9000A StateofLED10 0013 StateofLED190014 StateofLED20

Additional data bytes specify e.g. the LEDstates(hex):

0000 Off0001 Steady light0002 Shortflashpulses0003 Quickflash0004 Slowflash

Ifanerroroccurs,theM4700-80willrespond with the following error codes (hex):

01 Unknownfunction02 Illegaldataaddress

AdetaileddescriptionoftheMODBUSprotocol can be downloaded from the SELCO web site at www.selco.com.

Centronics Line Printer

Mess Room

Captain’s Cabin

Engineer’s Cabin

2-wire RS485 MODBUS -RTU

(max. 1000 metres)

Fig. 4. Event Logging.

SW1 SW2 F 1F 2F 3F 4F 5F 6

Baudrate

1200baud2400baud 4800 baud 9600 baud19200baud38400 baud

Indication

LED1LED2LED3LED4LED5LED6

Fig. 5. Setting of baud rate.

.

Location 1 (e.g. Engine Room) Location 2 (e.g. Pilot Bridge) Location 3-4-5

M47

95-8

0-62

E

Fig. 6. Dimensions.

SpecificationsM4700-80 MODBUS IndicatorVoltage supply 24V DC ±25%Consumption Max. 3W (100mA at 24V DC)Inputs 20 physical inputs and 20 “virtual inputs”LEDs 20 programmable and 2 for system informationLED flash frequency Slow flashing light: 1.25Hz ±10% Quick flashing light: 5 Hz ±10%Alarm relay Normally open (NO) contactSiren relay Normally open (NO) contactContact data AC = 250V, 1.2A, 125VA. DC = 30V, 1A, 30WCommunication RS485 interfaceProtocol MODBUS-RTUBaud rate 1200, 2400, 4800, 9600, 19200, 38400Parity NoneData bits 8Stop bits 1Operating temperature -10°C to +70°CEMC CE according to EN50081-1, EN50082-1, EN50081-2, EN50082-2Burn-in 50 hours before final testWeight 0.8kgDimensions 144 x 144 x 67mm (H x W x D)Panel cut out 138 x 138mmProtection degree at front IP31

The specifications are subject to change without notice.

AccessoriesM0847.0010 Front cover for M4700 with handle IP54M0847.0020 Front cover for M4700 with key IP54

SELCO Worldwide

13mm

144

mm

EXHAUST TEMP. EXHAUST TEMP.

Cut out 138 x 138mm

INSULATION MONITOR +

INSULATION MONITOR -

LAMP TEST

CABLE MONITOR

FUEL LEAKAGE

SIREN RESET

CABLE MONITOR

INSULATION MONITOR -

INSULATION MONITOR +

FUEL LEAKAGE

144mm

HIGH OIL TEMP.

UNDERVOLTAGE 24V

LOW FUEL LEVEL

OVERVOLTAGE 24V

OVERLOAD

UNDERVOLTAGE 24V

OVERVOLTAGE 24V

LOW FUEL LEVEL

HIGH OIL TEMP.

MODBUS indicator panel M4700

OVERLOAD

67mm

Main office:SELCO ApSBetonvej10DK-4000RoskildeDenmarkPhone: +4570261122Fax: +4570262522e-mail: selco@selco.comwww.selco.com