1770-SC Allen-Bradley

1770-SC Allen-Bradley Power Board

Brand：Allen-Bradley Model number：1770-SC

Country of origin: United States Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The 1770-SC Station Connector is a passive network component engineered to maintain the electrical integrity of a industrial blue hose token-ring network. It allows a "drop cable" from a specific programmable logic controller or computer interface module to securely splice into the main "trunkline" cable. The internal design of the connector incorporates specific terminal connections that minimize signal attenuation and reflections, which are critical for preserving the high-speed data transmission required in real-time factory automation. It is enclosed in a rugged, industrial-grade housing meant to withstand the harsh electromagnetic and physical conditions of factory floors.

Product Parameters

Network Compatibility: Allen-Bradley Data Highway (DH) and Data Highway Plus (DH+) networks.
Cable Compatibility: Designed for use with standard Allen-Bradley twinaxial "Blue Hose" cables (such as 1770-CD).
Connection Type: Screw-terminal clamp connections for the main trunkline and a specialized drop-line port.
Enclosure Rating: Typically housed in a robust, industrial-grade metal or high-impact plastic enclosure suitable for panel or wall mounting.
Operating Temperature: Engineered to function across standard industrial ranges, typically $0\text{°C}$ to $60\text{°C}$ ( $32\text{°F}$ to $140\text{°F}$ ).
Storage Temperature: $-40\text{°C}$ to $85\text{°C}$ ( $-40\text{°F}$ to $185\text{°F}$ ).
Relative Humidity: 5% to 95% non-condensing.
Isolation: Passive design without internal power requirements, ensuring no electrical back-feeding into the network trunk.

Product Advantages

A primary advantage of the 1770-SC is its Reliable Signal Splicing. By providing a dedicated, shielded connection point, it prevents the signal degradation that often occurs with makeshift wire splices, thereby reducing network packet errors. The Ease of Maintenance is another key benefit; it allows users to connect or disconnect individual machines (nodes) from the network drop without having to cut the main trunk line or bring down the entire communication loop.

Its Rugged Industrial Design ensures excellent shielding against electromagnetic interference (EMI) and radio frequency interference (RFI), which are highly prevalent near high-power industrial motors and drives. Furthermore, its Passive Architecture means it does not require external power to operate, increasing overall system reliability since there are no active electronic components that could fail.

Important Considerations and Precautions

When installing the 1770-SC, adhering to Strict Shielding Continuity is paramount. The shield or drain wire of the blue hose cable must be continuously grounded through the connector terminals according to Allen-Bradley networking guidelines to prevent noise loops. Users must strictly observe Drop Cable Length Limits; on a DH+ network, exceeding the maximum specified drop cable length (typically 100 feet depending on the baud rate) will cause severe signal reflections and intermittent communication dropouts.

Because the 1770-SC is a legacy product associated with older automation systems, care must be taken during wiring to ensure that the Terminal Screws are Not Over-tightened, which can crush the internal dielectric material of the twinaxial cable and alter its characteristic impedance. Finally, ensure that Network Terminating Resistors (typically 150 ohms or 82 ohms depending on the specific DH/DH+ architecture) are placed at the physical ends of the trunkline, and not inside individual intermediate 1770-SC connectors, to prevent catastrophic signal loss.

Product Applications

The Allen-Bradley 1770-SC is predominantly found in older, established manufacturing facilities that utilize legacy Rockwell automation architectures.

Automotive Assembly Plants: Interfacing legacy PLC-5 networks managing older welding lines or paint booth conveyors.
Pulp and Paper Mills: Connecting distributed control nodes over long distances across the plant floor where modern Ethernet has not yet replaced legacy networks.
Food and Beverage Processing: Managing communications between processing vats, mixers, and centralized monitoring stations utilizing legacy DH+ protocols.
Material Handling Systems: Linking older sorting systems and baggage handling machinery to central control processors.
Water and Wastewater Facilities: Linking remote pump stations and telemetry units back to a central control room over long-distance twinaxial cable lines.

1794-OE8H/B Allen-Bradley

We have the same series of models in stock. If you don't find the model you need, please contact us and we will provide you with an official quotation！

Allen-Bradley 440G-TZS21UPRH

Allen-Bradley 700-HLS1U2

Allen-Bradley 1440-SDM02-01RA

Allen-Bradley 1492-IFM40F-3

Allen-Bradley 1746-A10

Allen-Bradley 1746-NI4

Allen-Bradley 1746-NI8

Allen-Bradley 1747-L541

Allen-Bradley 1747-L552

Allen-Bradley 1756-A4

Allen-Bradley 1756-A10

Allen-Bradley 1756-A13