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Beckhoff Automation Pty. Ltd.

Building 4, 163–179 Forster Road
Mount Waverley, VIC 3149, Australia

+61 3 9912 5430
info@beckhoff.com.au
www.beckhoff.com/en-au/

KL1904 | Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

Image similar, may contain optional accessories
KL1904 | Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

KL1904 | Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

Input 1
Input 3
Diagnostic 1
Diagnostic 3
Input 2
Input 4
Diagnostic 2
Diagnostic 4
Power contact
+24 V
Power contact 0 V
Input 1
Input 3
Input 2
Input 4
Top view 
Contact assembly 
KL1904 | Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

KL1904 | Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

The KL1904 safety Bus Terminal is a digital input terminal for sensors with potential-free contacts for 24 V DC and has four fail-safe inputs.

Product status:

regular delivery

Product information

Technical dataKL1904
Connection technology2-wire
Number of inputs4
ProtocolTwinSAFE/Safety over EtherCAT
Response timetyp. 4 ms (read input/write to K-bus)
Fault response time≤ watchdog time (parameterizable)
Current consumption power contacts
Current consumption K-bus48 mA
Installation positionhorizontal
Safety standardDIN EN ISO 13849-1:2008 (Cat. 4, PL e) and EN 61508:2010 (SIL 3)
Weightapprox. 50 g
Protection ratingIP20
Ex markingATEX:
II 3 G Ex ec IIC T4 Gc
IECEx:
Ex ec IIC T4 Gc
Housing dataKL-12-8pinKS-12-8pin
Design formcompact terminal housing with signal LEDsterminal housing with pluggable wiring level
Materialpolycarbonate
Dimensions (W x H x D)12 mm x 100 mm x 68 mm
Installationon 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means ofdouble slot and key connection
Markinglabeling of the BZxxx series
Wiringsolid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-sections*: 0.08…2.5 mm²,
st*: 0.08…2.5 mm²,
f*: 0.14…1.5 mm²
s*: 0.08…1.5 mm²,
st*: 0.08…1.5 mm²,
f*: 0.14…1.5 mm²
Connection cross-section AWGs*: AWG28…14,
st*: AWG28…14,
f*: AWG26…16
s*: AWG28…16,
st*: AWG28…16,
f*: AWG26…16
Stripping length8…9 mm9…10 mm
Current load power contactsImax: 10 A

*s: solid wire; st: stranded wire; f: with ferrule

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