What exactly is the BWU1777?

It is an industrial-grade AS-i 3.0 to PROFIBUS fieldbus double master communication gateway encased in a rugged stainless steel housing, manufactured by Bihl+Wiedemann, Germany.

What is the primary purpose of BWU1777?

It acts as a protocol converter that collects sensor and actuator data from the lower-level AS-i network, packages it, and transmits it to the upper-level PROFIBUS master, such as a Siemens PLC.

How does BWU1777 achieve 1 power supply for 2 AS-i networks?

The module features integrated data decoupling, which allows users to safely power two independent AS-i loops using only one standard AS-i power supply, saving on hardware costs.

How do you physically install the BWU1777?

It features a standard vertical snap-on mechanism for direct mounting onto a 35mm DIN rail inside a control cabinet. Its stainless steel housing provides excellent resistance to vibration and electromagnetic interference.

How many slaves can be connected to the BWU1777?

As a double master gateway, each of its two loops supports up to 62 A/B slaves. Therefore, the entire device can accommodate up to 124 slave modules in total.

BWU1777

Name: BWU1777
Brand: BIHL+WIEDEMANN
SKU: BWU1777

AS-i PROFIBUS Gateway

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

ASi-3 PROFIBUS Gateway
in Stainless Steel, 2 masters
LCD Display with 4 push-buttons
for local operation
PROFIBUS DP
(In accordance with IEC 61158)

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Technical specifications for BWU1777

Manufacturer:

BIHL+WIEDEMANN
Product Category:

General Automation
Spare Part Number:

BWU1777
Estimated shipping dimensions:

12x7.5x8.3cm
Weight:

0.46 kg
Tariff Code:

8537101190
Counliy of origin:

GREMANY
Operating Temperature:

0 °C to +55 °C
Supply voltage:

24V DC
Equipment protection level:

IP20 Rating
Category:

Extension modules
Fieldbus Interface:

PROFIBUS DP (according to IEC 61158)
Operating Current:

Approx. 250 mA (PELV voltage)

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Information

Overview Manuals Common Applications Product Precautions

The BWU1777 is an AS-i 3.0 PROFIBUS gateway from Bihl+Wiedemann, a renowned German industrial automation brand. This product belongs to the AS-i master gateway series and is specifically designed to connect data from an AS-i network to a PROFIBUS DP fieldbus network.

High-Speed PROFIBUS DP Protocol Conversion
Dual AS-i 3.0 Masters for Double Network Capacity
Integrated Diagnostics & Smart Cost-Saving Design

Encased in a rugged, noise-resistant stainless steel housing, this high-density protocol converter acts as a reliable communication bridge, collecting critical sensor and actuator data from the lower AS-i network and transmitting it seamlessly to upper-level PLCs (such as Siemens S7) via standard PROFIBUS DP at speeds up to 12,000 KBaud. Engineered for ultimate efficiency, the BWU1777 features a powerful Double Master (2 AS-i Masters) architecture, enabling a single module to manage up to 124 smart field slaves across two distinct loops simultaneously. Thanks to its integrated data decoupling technology, this gateway delivers exceptional cost-efficiency by allowing users to power two independent AS-i networks using just one standard power supply. Additionally, the built-in intuitive LCD display and push-buttons empower field technicians with instantaneous, PC-free diagnostics—including duplicate address recognition, ground fault detection, and noise monitoring—maximizing system uptime in demanding automation environments.

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.

BIHL+WIEDEMANN BWU1777 AS-i PROFIBUS Gateway Manuals, Datasheets, Drivers, Link

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.

Automotive

Deployed on large automated main roller conveyors and multi-station robotic cells within stamping, body-in-white (BIW) welding, and final assembly lines.

Material Handling & Logistics

Applied to high-speed belt conveyor matrices, cross-belt sorters, and vertical lifter/diverter transfers in mega e-commerce fulfillment centers or hub airports.

Pharmaceutical

Widely utilized in automated tablet presses, hard-capsule fillers, and fully enclosed vial washing-sterilizing-filling-sealing lines with stringent cleanliness protocols.

Tire & Rubber

Deployed across automated tire building machines, internal mixers, giant curing presses, and finished tire roller testing conveyors.

Semiconductor

Configured into Automated Optical Inspection (AOI) machines, pick-and-place equipment, and automated wafer pod packaging lines within semiconductor testing and post-packaging facilities.

When using the BWU1777 gateway, you must use standard flat AS-i cables with a maximum length of 100 metres per loop (repeaters required beyond this limit), and ensure total current stays within safety thresholds when running a single-power dual-network setup. Additionally, the IP20 module must be housed in a ventilated cabinet operating between 0°C and +55°C. During setup, the BW5176.GSD file must be correctly imported, and the built-in LCD screen should be used to scan and resolve any "Duplicate Address" conflicts among field slaves.

FAQ View All FAQ

What exactly is the BWU1777?

It is an industrial-grade AS-i 3.0 to PROFIBUS fieldbus double master communication gateway encased in a rugged stainless steel housing, manufactured by Bihl+Wiedemann, Germany.
What is the primary purpose of BWU1777?

It acts as a protocol converter that collects sensor and actuator data from the lower-level AS-i network, packages it, and transmits it to the upper-level PROFIBUS master, such as a Siemens PLC.
How does BWU1777 achieve 1 power supply for 2 AS-i networks?

The module features integrated data decoupling, which allows users to safely power two independent AS-i loops using only one standard AS-i power supply, saving on hardware costs.

How do you physically install the BWU1777?

It features a standard vertical snap-on mechanism for direct mounting onto a 35mm DIN rail inside a control cabinet. Its stainless steel housing provides excellent resistance to vibration and electromagnetic interference.
How many slaves can be connected to the BWU1777?

As a double master gateway, each of its two loops supports up to 62 A/B slaves. Therefore, the entire device can accommodate up to 124 slave modules in total.

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