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HART Multiplexer System KFD*-HM*-16
Product specification
3
Product specification
3.1
HART Multiplexer Master
3.1.1
Delivery package
3.1.2
Accessories/product family
Note
3.1.3
Description of the hardware
Included in the delivery package of the KFD2-HMM-16 are:
•
HART Multiplexer Master KFD2-HMM-16
•
Operating instructions
Included in the delivery package of the KFD0-HMS-16 are:
•
HART Multiplexer Slave KFD2-HMS-16
•
Operating instructions
In addition to the HART Multiplexer Master, the following items from the HART
Multiplexer System family of products are available from Pepperl+Fuchs:
•
KFD0-HMS-16, HART Multiplexer Slave, for extending the HART channels
•
KSD2-HC, HART RPI control module, for connecting the HART Multiplexer to the
RPI product family
•
K-HM14, cable Master <> Slave, for connecting the Master with the Slaves
•
FI-***, HART flexible interface, handover interface of the analog signals between
transmitter, Multiplexer and PLC/DCS (control system specific)
•
K-HM26, cable Master/Slave <> FI-***/MB-***, for connection of Master/Slave
with flexible interface FI-*** or motherboard MB-***, respectively
•
Interface converter RS 485 <> RS 232 (Telebyte Model No. 285), converter
RS 485 <> RS 232, Pepperl+Fuchs order code: Telebyte Model 285M
The complete product family is described in the Pepperl+Fuchs product catalogs.
Please refer to the ordering instructions detailed in the catalogs.
The HART Multiplexer can operate up to 256 analog transmitters. The built-in Slave
unit operates the first 16 loops, and a maximum of a further 15 KFD0-HMS-16 Slaves
can be connected.
The external connections are shown in Figure 3.1 and Figure 3.2.
The power supply (24 V DC nominal voltage) is provided via the Power Rail or
terminals 17 and 18. The optional Slave units (KFD0-HMS-16) or the RPI control
module (KSD2-HC) are connected with the Master via a 14-core flat cable
(K-HM14). Its connector is placed on the same housing side as the terminals for the
RS 485 interface and the voltage supply. The analog signals for each unit are
connected separately via a 26-core cable. 16 leads are provided for the HART
signals of the analog instrument circuits, the other 10 are connected to ground. The
minimum load resistance of the analog instrument circuits is 230 (min. load
resistance in accordance with the HART specification), the max. load resistance is
500 . Load resistances of up to 1000 are possible, however, resistance values
greater than 500 can interfere with the HART communication. The connector for
these connections is located on the top of the housing. A process control system or a
PC can be connected via a RS 485 interface (terminals 13, 14 and 15). Up to 31
KFD2-HMM-16 can be operated on one RS 485 interface. Terminals 19, 20 and 21
can be used to connect additional stations to the RS 485 interface. The DIP switch
on the housing front is for the setting of the RS 485 address and the baud rate.
9
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