MTL643/644 DISPLAYS
Contents
1. 4 lt Barrier or Isolator With MIL644 connections are from 5051 to PL1 terminals 2 and 3 and the optional alarm is connected to PL2 terminals 1 and 2 MTL643 or MTL644 Separately powered MTL644 SW1 PL2 1 2 MTL5051 Upto3 more lt MTL643 4s lt MTL5025 Barrier or Isolator t With MTL643 connections are from 5051 5025 to terminals10 11 and 12 and the optional alarm is connected to terminals 1 and 2 APPROVALS Standard Certificate Approved file no for Country Authority Australia SA Canada CSA AS2380 7 C22 2 No 157 Ex ia IIC T4 Class Div 1 Gps A D T4 99Ex0226 I2G EEx ia IIC T4 EEx ia IIC T4 EEx ia IIC T4 EEx ia IIC T4 systems Class I Il Ill Div Gps A G Class Div 2 Gps A D EN 50014 amp EN 50020 EN 50014 amp EN 50020 EN 50014 amp EN 50020 EN 50039 Czech Republic FTZU Switzerland SEV 99 7 70466 03 Ex90C 2002 Ex99E2199 UK BASEEFA to CENELEC standards USA FM 3610 entity 3611 non incendive Approvals pending TO ORDER specify Model MTL643 field mounting IS text display MTL644 panel mounting IS text display Interface MTL5051 RS232 or RS422 MITL5025 PIP68 pipe post mounting for MTL643 IPK68 for MTL6442. IS power supply Mounting kits Sealing kit Literature INM643 user s manual
3. process information such as the resetting of the tare in a weighing system The controller maintains master control requiring all remote display units to respond to its commands In multi indicator applica tions it transmits a block of information which includes the indicator type address and data Data is transmitted in the form of ASCII ig sorial data indicates ital vy MAWAS VUA MAANA A A PAUNA YA AUN IAN AS A Wiad Lede hah Hy y UURI i MW AW AA 1 AN l ATI i At eet DV VAAL AAAA j iH i ROW WNWY WN 0 A i YL 2 ELLY characters interpreted by the appropriate indicator which either updates the display or responds with a reply such as indicator status or switch status In single indicator applications the protocol may be simplified to direct data transmission for communication with less sophisticated host units including PLCs dedicated control instrumentation and weighing systems A single alarm output an opto isolated open collector transistor output is provided for connection to a suitable visual or audible alarm unit to attract the operator s attention Error checking routines are carried out by the indicator the result being stored in the status data register where it can be accessed by the host computer MTL643 field mounting unit is housed in a tough impact resistant GRP case designed to withstand the rigours of hostile weather conditions and harsh industrial en
4. Alphanumeric displays in hazardous areas Large LCD alphanumeric display Point to point or multidrop communication with PC PLC or simple host RS232 or RS422 in safe area Easy to configure simple ASCII communication Tough impact resistant field unit with separate terminal compartment DIN standard panel mounted version MTL643 644 DISPLAYS IS text displays 8S MTL643 5 indicato The MTL643 4 IS text displays are located in the hazardous area where they display alphanumeric data from a safe area host controller This is transmitted by a serial data link passing through an MTL5051 isolat ing interface This serves the dual purpose of isolating the IS indicator and converting RS232 or RS422 serial data to the MTL signal level and vice versa Bi directional com munication permits operators to acknowledge messages and to request process action when necessary If required an audible or visual alarm can be connected to attract the opera tors attention A clear and unambiguous alphanumeric display is provided by liquid crystal module with two lines of up to sixteen 9mm high characters All 32 characters may be alphanumeric so process values engineering units tag idents and operator messages are easily displayed Operator control is provided by three external switches not supplied which are connected to terminals on the indicator and which can be used to acknowledge alarm messages and change
5. cators One interface unit can pass data to up to four indicators provided power is supplied by a MTL5025 IS remote source Data link Single data highway from IS interface unit half duplex Host controller format RS232 or RS422 Multi indicator configurations communicate according to MTL serial data protocol see publication INM643 Single indicator configurations can communicate by a direct ASCII data pattern indicator address set at O System protocol Transmission based on blocks of information using printable ASCII characters full MTL system protocol software provided in publication INM643 Transmission speeds and format DIL switch selectable 1 2 2 4 4 8 or 9 6kbaud 1 or 2 stop bits odd even or no parity bit 7 or 8 data bits Note Combinations of 8 bits 2 stop bits parity bit and 7 bits 1 stop bit no parity are not permitted Terminals For conductors up to 2 5mm Safety descriptions lt 28V lt 1 2W lt 200mA Weight MTL643 approximately 1 3 kg MTL644 approximately 275 g Ambient temperature O to 50 C working 20 to 70 C storage Humidity O to 95 non condensing Dimensions and mounting details MTL643 see MTL680 Series field mounting indicators page for details MTL644 see MTL680 Series panel mounting indicators page for details SYSTEM CONFIGURATIONS MTL643 or MTL644 Signal powered MTL643 IS text display MTL505 1 To second lt MTL643
6. vironments Ingress protection rating is IP66 It can be mounted directly onto a flat surface or with an optional PIP68 kit onto vertical or horizontal pipes or posts MTL644 panel mounting unit is designed for DIN standard 72 x 144mm casing The cut out size will depend on the rating required The front panel fascia is protected to IP65 while with standard snap on mounting clips the panel unit seal is rated IP40 This can be uprated to IP65 with the optional IPK68 sealing kit For mounting details see MTL680 SPECIFICATION Location Zone O IIC T4 hazardous area Div 1 Group A hazardous area Power supply 9 to 28V at 8mA through interface or from IS supply Display 2x16 character alpha numeric lcd display 9 mm characters 5x7 dot matrix Display characters ASCII character set plus 8 computer defined soft characters Cursor position Host computer controlled visible or invisible on display Controls Terminals provided for connecting three external switches for operators to acknowledge messages or initiate process changes maximum cable length 5m Alarm One opto isolated open collector transistor to operate visual or audible alarm External power supply required Transistor spec open circuit voltage lt 28V short circuit current lt 5OmA lt 2V drop at 50mA IS interface MTL5051 Serial data communications isolator converts RS232 RS422 to MTL serial data format One interface unit can power up and pass data to one or two indi
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