Dwyer MTL5045 - Manual (Page 15)

11 INM5000-6 Jul 2010
Sarel (UK) Tel+44 (0)1793 514774
Bowthorpe Hellermann (UK) Tel +44 (0)1922 458151
Table 5.7: Recommended cable glands for use with DX enclosures.
Weidmuller (UK) Tel +44 (0)1795 580999
Sarel (UK) Tel +44 (0)1793 514774
5.3 Accessories in enclosures
Apart from mounting, there are some other installation details which
should be considered before adding the appropriate interface modules
and making the necessary cabling connections.
A range of accessories is available to accompany the MTL5000 units
(see section 4). Further details of these accessories are provided in
product sheet EPS57ACC and instruction manual INM57ACC but the
following points should be observed.
5.3.1 Insulating mounting block (IMB57)
A pair of these can be attached to the DIN rail, at either end of the
modules, to provide a mounting for earth rails. Use of mounting blocks
will reduce the space available for isolator modules.
5.3.2 Earth rails (ERL7)
Earth rail is produced in 1 metre lengths and will require cutting to length
before mounting. ERL7 earth rails can be mounted either side of the
modules but are typically mounted on the hazardous side of the DIN rail.
5.3.3 Tagging strip (TAG57 and TGL57)
Tagging strip is produced in 1 metre lengths and will require cutting to
length before mounting. Similarly, the labels will require cutting to fit the
tagging strip.
5.4 IS warning label
A 'Take Care' IS warning label is provided inside each enclosure. This
should be attached to the inside of the transparent lid when its
orientation has been established.
6 UNIT DESCRIPTIONS, SETTING-UP,
CONNECTIONS AND TESTING
For each MTL5000 Series unit, this section describes the function
(briefly), the setting-up procedure, wiring connections and includes a
simple functional test. For a fuller functional description and a detailed
technical specification, refer to the appropriate entry in MTL's current IS
catalogue.
The functional tests can be carried out during commissioning or later, for
fault finding. If a fault is suspected, first check that the power LED is lit
(not applicable to loop-powered devices). If necessary, check that all
signal and power plugs are properly inserted, that no wires are loose
and that the unit is mounted correctly. If operation is still suspect, carry
out the tests. They establish whether power supplies are connected
properly and whether the isolator is operating correctly. Please return
units that fail these tests to the supplier.
6.1 MTL5011 single-pole relay single-
channel switch/proximity detector
with phase reversal
(Discontinued use MTL5011B)
The MTL5011 enables a safe-area load to be relay-controlled by a
switch or proximity detector located in a hazardous area. Output phase
reversal (see 3.1.3) is provided.
6.1.1 Wiring connections
See figure 6.1 for wiring connections.
Note: Reactive loads must be adequately suppressed
Manufacturer/agent Manufacturer’s part number
Enclosure DX170 Enclosure DX430
Bowthorpe Hellermann TL-27/360 TL-27/270
Sarel 21128 21127
Table 5.6: Recommended gland plate kits for DX170 and DX430 enclosures.
Gland Cable Gland plate Weidmuller part nos. Sarel part nos.
thread sizes hole size
size (mm) (mm) Gland Locknut Gland Locknut
PG9 5 to 8 15.2 951891 952216 08871 08881
PG13,5 8 to 13 20.4 951893 952218 08873 08883
WARNING
When disconnecting units for testing, take care to
segregate hazardous- and safe-area cables. Short
circuit hazardous-area cable cores to an IS earth or
insulate and secure the ends. Insulate and
secure safe-area cables. If testing 'in situ' note that
the test equipment used MUST be intrinsically safe.
Terminal Function
1 Input –ve
2 Input +ve
3 Earth leakage detection
11 Output
12 Output
13 Supply –ve
14 Supply +ve
3
2
1
6
5
4 7
8
9
10
11
12
13
14
To earth
leakage
detector
Vs–
Vs+
20 to 35V dc
+
–
Figure 6.1: MTL5011 wiring diagram and connections
Hazardous area Safe area