The Beckhoff KL2904 is a 4-channel TwinSAFE safety digital output terminal block suitable for demanding industrial safety scenarios, combining high reliability with standardized integration.
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Technical specifications for KL2904
Manufacturer:
BECKHOFF
Part Number:
KL2904
Product Family:
BECKHOFF
Number of inputs/outputs:
0/4
Status display:
4 (one green LED per output)
Fault reaction time:
≤ watchdog times
Output current per channel:
max. 500 mA, min. 20 mA
Cable length between sensor and terminal:
unshielded max. 100 m, shielded max. 100 m
Input/Output process image:
6 bytes
KL2904 supply voltage:
24 VDC (–15% / +20%)
Current consumption via K-bus:
maximum 250 mA
Power loss of the terminal:
typically 2 W
Permissible ambient temperature (operation):
0 °C to +55 °C
Permissible ambient temperature (transport/storage):
-25 °C to +70 °C
Permissible air humidity:
5% ... 95%, non-condensing
Permissible air pressure (operation/storage/transport):
750 hPa ... 1100 hPa
Shocks:
15 g with pulse duration 11 ms in all three axes
Protection rating:
IP20
Approvals:
CE
Weight:
0.1 kg
Estimated shipping dimensions:
2.4x10x6.8cm
Tariff Code:
8537101190
Country of origin:
Germany
Place of shipment:
Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.
The Beckhoff KL2904 is a safe digital output terminal designed for connecting actuators such as contactors and relays in industrial automation systems. It features four fail-safe outputs with a maximum current of 0.5 A per channel (24 V DC), making it ideal for implementing safety-critical applications.
The terminal complies with international safety standards, including IEC 61508 SIL 3, DIN EN ISO 13849-1 (Cat 4, PL e), NRTL, UL508, UL1998, and UL991, ensuring reliable performance in demanding environments. Each output is equipped with a status LED, providing immediate visual feedback for operational monitoring.
The KL2904 supports a 24 V DC supply (–15% / +20%) and draws maximum 250 mA from the K-bus. Its compact bus terminal design integrates easily with other Beckhoff Bus Terminals, providing 6-byte I/O process images, with maximum cable lengths of 100 m (shielded or unshielded) between terminal and sensor.
Engineered for industrial conditions, the KL2904 operates in 0–55 °C, tolerates 5–95% relative humidity, withstands shocks up to 15 g, and meets the IP20 protection rating, ensuring durability and reliable operation for safety automation applications.
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