Allen-Bradley 1771-IG: TTL Logic and 5 V Wiring Checks
Check 1771-IG TTL HIGH/LOW logic thresholds, field supply ripple and 1771-WC wiring before replacing an input module.
Manufacturer: BECKHOFF
Product No.: IP2021-B520
Country of origin:Germany
Product Type: Fieldbus Boxes
Payment: T/T, Western Union
Weight: 2000g
Dimensions: 30 mm x 175 mm x 26.5 mm
Shipping port: Xiamen
Warranty: 12 months
Decentralized automation architectures require robust field-level I/O processing, which is efficiently handled by the Beckhoff IP2021-B520 digital output module. This DeviceNet fieldbus box allows direct connection of up to eight digital actuators to a high-speed DeviceNet network. By utilizing a fully sealed IP67-rated housing, this module eliminates the need for traditional control cabinets, enabling direct machine mounting and significantly reducing field wiring complexity.
The module features eight independent digital outputs capable of switching loads up to 2 A per channel. It supports automatic baud rate detection up to 500 kbaud, ensuring seamless integration into existing DeviceNet topologies. Designed for demanding industrial environments, the unit offers comprehensive short-circuit protection and electrical isolation between the control voltage and the fieldbus network.
| Manufacturer | BECKHOFF |
| Part Number/Model | IP2021-B520 |
| Number of Outputs | 8 |
| Output Connections | M8, screw type |
| Load Type | Ohmic, inductive, lamp load |
| Nominal Output Voltage | 24 V DC (-15% / +20%) |
| Max. Output Current | 2 A per channel (individually short-circuit proof, sum max. 4 A) |
| Short-Circuit Current | Max. 4 A |
| Auxiliary Power Current | Typ. 30 mA per channel |
| Box Supply Current | 45 mA + sensor current (max. 0.5 A) |
| Bus Interface | 1 x M12 plug, 5-pin |
| Data Transfer Rates | 125 kbaud, 250 kbaud, 500 kbaud (automatic detection) |
| Process Image Bit Width | 8 outputs |
| Electrical Isolation | Control voltage / fieldbus: 500 V |
| Operating Temperature | 0 to +55 degC |
| Storage Temperature | -25 to +85 degC |
| 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 |
| Protection Class | IP65/66/67 (conforms to EN 60529) |
| Housing Material | PA6 (polyamide) |
| Dimensions (W x H x D) | 30 mm x 175 mm x 26.5 mm |
| Weight | 2.0 kg (Shipping Weight) |
| Connection Type | Interface Specification |
|---|---|
| Bus Interface | 1 x M12 plug, 5-pin |
| Power Supply Feed | 1 x M8 male socket, 4-pin |
| Power Supply Downstream | 1 x M8 female socket, 4-pin |
| Digital Outputs | 8 x M8 screw-type connectors |
For secure installation and reliable operation in industrial environments, adhere to the following guidelines:
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Returns & Warranty

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Returns & Warranty
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| Country of origin |
Germany
|