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Beckhoff KL6781

Bus Terminal, 1-channel communication interface, M-Bus, master

MPN: KL6781
Category: KL6xxx | Communication

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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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What is the Beckhoff KL6781?

The KL6781 M-Bus master terminal enables the direct connection of M-Bus devices. The M-Bus (Meter Bus) is a fieldbus for the acquisition of consumption data from electricity, water, gas or energy meters. The KL6781 does not contain the M-Bus protocol

Specifications

Technology	M-Bus
Data transfer standard	M-Bus physics
Data transfer channels	1
M-Bus devices	max. 40 standard loads, each with a current consumption of 1.5 mA
Data transfer rates	300…9600 baud (default 2400 baud)
Bus access	master-slave mode (polling)
Cable length	max. 300 m
Current consumption K-bus	typ. 65 mA
Current consumption power contacts	max. 250 mA
Short-circuit proof	yes
Electrical isolation	500 V (K-bus/M-Bus)
Bit width in the process image	input/output: 24 bytes
Configuration	TwinCAT (M-Bus function blocks)
Nominal voltage	24 V DC (-10%/+8%)
Input voltage	24 V DC (-10%/+8%)
Special features	TwinCAT library: TwinCAT PLC M-Bus
Weight	approx. 60 g
Operating temperature	0…55°C
Storage temperature	-25…+85°C
Relative humidity	95%, no condensation
Vibration/shock resistance	conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission	conforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos.	IP20/see documentation
Approvals/markings	CE, UL
Design form	compact terminal housing with signal LEDs
Material	polycarbonate
Installation	on 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means of	double slot and key connection
Marking	labeling of the BZxxxx series
Wiring	solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-section	s: 0.08…2.5 mm², st: 0.08…2.5 mm², f*: 0.14…1.5 mm²
Connection cross-section AWG	s: AWG28…14, st: AWG28…14, f*: AWG26…16
Stripping length	8…9 mm
Current load power contacts	Imax: 10 A
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm

KL6781: frequently asked questions

When can KL6781 be shipped?

KL6781 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up KL6781 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for KL6781 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for KL6781, subject to availability and destination.