Pepperl Fuchs KFD2-HMM-16

The KFD2-HMM-16 is a 16-channel HART Multiplexer Master module from Pepperl+Fuchs' K-System. It serves as the central communication hub for accessing HART digital data from up to 256 analog field instruments without interrupting the 4–20 mA analog signal loop.

Key Features

16 channels – Each master module supports up to 16 analog field instruments
Scalable system – Up to 15 KFD0-HMS-16 slave units can be connected to a single master, enabling up to 256 HART devices per system
24 V DC supply – Supports Power Rail for convenient DIN-rail power distribution
HART compatibility – Supports HART revision 5 to 7 field devices
Functional Safety – Certified for applications up to SIL 3 per IEC/EN 61508

System Architecture

The KFD2-HMM-16 operates as the primary module, with a built-in slave unit handling the first 16 instruments.
Up to 15 additional slave modules (KFD0-HMS-16) connect via a 14-pin flat cable to expand capacity.
Analog signals connect to termination boards via a 26-pin flat cable for each unit.
Communication to a PC or control system uses an RS-485 2-wire multidrop interface.

Technical Specifications

Parameter	Value
Safety Integrity Level (SIL)	SIL 3 acc. to IEC/EN 61508
Rated Voltage	20–32 V DC, typical at 100 mA
Power Consumption	max. 3 W
HART Compatibility	Revision 5 to 7
Leakage Current	< 3 µA at -20 ... 85 °C
Transfer Rate	9600, 19200, or 38400 Bit/s (selectable via DIP switches)
Interface Type	RS-485, 2-wire multidrop
Address Selection	One of 31 possible addresses (DIP switch configurable)
Configuration	Via DIP switches
Operating Temperature	-20 ... 60 °C (-4 ... 140 °F)
Protection Rating	IP20
Weight	approx. 250 g
Dimensions (W × H × D)	40 × 107 × 115 mm (1.6 × 4.2 × 4.5 inch), housing type C1
Mounting	35 mm DIN mounting rail acc. to EN 60715
Hazardous Area Marking	II 3G Ex nA IIC T4 Gc
Certificate	PF 07 CERT 1143 X