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Operating Instructions
DMT-1000 Programmable Multifunction Transducer
Contents
1. Read first and then... ................................................. 4
2. Scope of supply .......................................................... 4
3. Brief description .......................................................... 4
4. Physical installation .................................................... 4
4.1 Mounting on top-hat rails ...................................... 4
4.2 Fastening on a mounting surface ........................ 5
5. Electrical connections ................................................ 5
6. Connecting devices to the bus ................................... 6
7. Commissioning .......................................................... 8
7.1 Technical data ...................................................... 8
7.2 PC software for the DMT-1000 ........................... 11
8. Notes of maintenance .............................................. 12
9. Releasing the transducer ......................................... 12
10. Dimensional drawings ............................................. 12
11. Safety notes .............................................................. 13
1. Read first and then ...
The proper and safe operation of the device
assumes that the Operating Instructions are
read and the safety warnings given in the
sections
4. Physical installation
5. Electrical connections
7. Commissioning
12. Safety notes
are observed.
The device should only be handled by appropriately
trained personal who are familiar with it and authorized to
work in electrical installations.
2. Scope of supply (Figs. 1, 2, 3 and 4)
Fig. 1
Fig. 2
Ohio Semitronics, Inc.
4
7004-00090-A Rev 2/00
15 16 17 18 19 20 21 22 23 24 25 26
+ -
Tx/Rx
CT Ratio
M :
M :
1
2
M :
M :
PT Ratio
3
4
System
Aux.
Power
I V I
I V I
I V I
N
+
-
1+
1
1
2+
2
2
3+
3
3
1 2 3
4
5 6 7
8 9 11 13 14
Fig. 3
Fig. 4
Transducer (Fig. 1)
1 Operating Instructions (Fig. 2) in two languages:
English and French,
1 blank type label (Fig. 3), for recording programmed settings
1 Interface definition DMT-1000 (Fig. 4): English and French
3. Brief description
DMT-1000 is a programmable transducer with a
RS 485 bus interface (MODBUS
variables of an electrical power system.
The RS 485 interface enables the user to determine the
number of variables to be supervised (up to the maximum
available). The levels of all internal counters that have been
configured (max. 4) can also viewed. Provision is made for
programming the DMT-1000 via the bus. A standard EIA 485
interface can be used.
The transducers are also equipped with an RS 232 serial
interface to which a PC with the corresponding software can
be connected for programming or accessing and executing
useful ancillary functions. This interface is needed for bus
operation to configure the device address, the Baud rate and
possibly increasing the telegram waiting time (if the master is
too slow) defined in the MODBUS
The usual methods of connection, the types of measured
variables, their ratings, the transfer characteristic for each
output and the type of internal power metering are the main
parameters that can be programmed.
The ancillary functions include a power system check,
provision for displaying the measured variable on a PC
monitor, the simulation of the outputs for test purposes and
a facility for printing nameplates.
4. Physical installation
The transducer can be mounted either on a top-hat rail or
directly onto a wall or mounting surface.
Note "Environmental conditions" in Section
"7.1 Technical data" when deteriming the place
of installation!
4.1 Mounting on top-hat rails
Simply clip the device onto the top-hat rail (EN 50 022) (see
Fig. 5).
Fig. 5. Mounting on top-hat rail
35 x 15 or 35 x 7.5 mm.
Page 4 of 24
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). It supervises several
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protocol.
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