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INM831B Rev 4 

 

 

 

Содержание MTL831B

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Страница 2: ...ECTIONS 3 4 1 RTD inputs 3 4 2 THCs and mV inputs 5 4 3 Mixed inputs 5 4 4 Highway connections 5 4 5 MTL3052 digital isolator 6 4 6 Multi transmitter connections 6 4 7 Cable screens 7 5 Configuration 7 5 1 Transmitter Address 7 5 2 RTD mode setting 7 6 ATEX information 8 6 1 General 8 6 2 Installation 8 6 3 Inspection and maintenance 8 6 4 Repair 8 6 5 Marking 8 6 6 Specific Conditions of Use 8 ...

Страница 3: ... highway connections If units are installed in our enclosures it details any special wiring arrangements Configuration the address and input mode selection by the setting of internal switches Note A new user might find it helpful to set up the system or a simple version of it in an indoor test area to gain familiarisation before undertaking installation on site 3 MECHANICAL INSTALLATION 3 1 Locati...

Страница 4: ...ting in an ENC8 ENC8 SS ENC83 or ENC83 SS enclosure figure 4 Remove the upper and or lower undrilled gland plates and drill suitable holes for the entry glands required Possible hole configurations are listed in the table Mount the unit on the internal T section rail of the enclosure as described in 1 Mount the enclosure on any flat surface using four M8 bolts or other suitable fasteners with a sh...

Страница 5: ...tation current connect terminal 39 to 41 and connect terminal 40 to 42 The unit can then calculate the current from the voltage developed across the built in 100 ohm resistor 2 wire RTD increased measurement accuracy Lead resistance in 2 wire applications causes inaccuracy Accuracy can be increased by substituting the wire link step 2 above with a resistor equal in value to the resistance of the l...

Страница 6: ...ad of each RTD except the last and the ve source lead of the next RTD 5 Connect the ve source lead of the first RTD to the ve end of the current loop terminal 7 6 Connect the ve source lead of the last RTD to the ve end of the current loop terminal 38 7 To monitor the RTD excitation current connect terminal 39 to 41 and connect terminal 40 to 42 The unit can then calculate the current from the vol...

Страница 7: ...d that they all are and will remain effectively at the same earth potential 4 3 Mixed inputs The ability to mix different input sensor types depends on the configurations available with the MTL838B receiver selected See the instructions supplied wtih the MTL838B receiver for details Connect the different sensors appropriately as described in sections 4 1 and 4 2 above 4 4 Highway connections The d...

Страница 8: ...ne or two data highways between output terminal pairs H1 terminals 1 and 2 and or H2 terminals 4 and 5 to the equivalent terminals on a second MTL831B transmitter terminals 3 and 4 for H1and terminals 1 and 2 for H2 NB two MTL831B transmitters or one MTL831B plus one MTL831 or two MTL832 transmitters can be linked in this way Hazardous area Safe area Serial data link to host computer mV THCs RTDs ...

Страница 9: ... can be removed Replacement of the blue terminal strip is the reverse of its removal instructions 5 1 Transmitter Address Four addresses 1 to 4 are possible with the SW100 switch settings as shown in Figure 13 Transmitter addresses must start at address 1 and must be sequential This means that two transmitters must have addresses 1 and 2 not 1 and 3 or 1 and 4 If only one transmitter is connected ...

Страница 10: ...cessive dust moisture and other contaminants 6 2 1 MTL831B This is IS apparatus and is normally mounted in a hazardous area It meets the requirement of Category 1 apparatus and may be installed in a Zone 0 or a Zone 1 location provided that the relevant installation requirements are met 6 2 2 MTL3052 This is associated apparatus and is always mounted in a safe area 6 3 Inspection and maintenance a...

Страница 11: ...INM831B Rev 4 9 ...

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