1771-DCM | Allen-Bradley Direct Communication Module
1771-DCM | Allen-Bradley Direct Communication Module
1771-DCM | Allen-Bradley Direct Communication Module
    1771-DCM | Allen-Bradley Direct Communication Module
1771-DCM | Allen-Bradley Direct Communication Module

1771-DCM | Allen-Bradley Direct Communication Module

Part #: 1771-DCM Manufactured by: Allen-Bradley
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$814.00
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$814.00
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Product Overview
Allen Bradley PLC 5 Direct Communication Module
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Product Description P/N: 1771-DCM

Description / Specifications

Description 

The Allen-Bradley 1771-DCM is a Direct Communications module. This module is used to implement direct communication between supervisory and local processors via the provided Serial interface that supports Remote I/O (RIO) protocol. This module supports discrete data wherein up to 7 words plus 1 status word may be transferred and block transfer where up to 66 words plus 1 status word may be transferred. It supports a 57.6Kbaud transmission rate using a 10,000 foot cable and 115.2 kbaud with a 5000 foot cable. This module has a backplane current draw of 1.2 Amperes.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1771-DCM
Relative Humidity 5-95 %
Operating temperature 32 to 131oF
Backplane Current 1.2 A
Compatible Keying Between 2 and 14; Between 16 and 18
Response Time 15 ms
Block Transfer data Up to 63 Words + 1 Status Word
Discrete Data Transfer Up to 7 Words + 1 Status Words
Transfer modes Discrete Data Transfer; Block Transfer
Communication cable Belden 9463 or any equivalent
Transmission rate 57.6K baud at 10,000 ft; 115.2K baud at cable length of 5000 feet
Supported Protocol Remote I/O (RIO)
Module Type Direct Communication Module (DCM)
Storage Temperature -40 to 185oF
Number of Bytes 32 Kilobytes
Number of Bits 8 Kilobits
Operation BASIC Programs and C Programs
Communication w/ PLC Processor Block-Transfer w/ PLC-5 Processor
Wiring Arm 1771-WN
Module Scan Time 1.3-5 ms
Coating Conformal Coat
Dimensions 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)

  

 

Information About 1771-DCM

The Allen-Bradley 1771-DCM is a PLC 5 Direct Communication Module. It allows communication between a local processor with the remote I/O scanner port of a supervisory processor by using a remote I/O adapter port across a remote I/O link. It supports two modes of transfer i.e., discrete transfer for up to eight words or block transfer for up to 64 words with 1 status word. A supervisory processor communicates with the 1771-DCM as an adapter module and the local processor communicates over the backplane using block transfer. It has uses in various applications where the transfer of data table values is required. The 1771-DCM module has a communication rate of 57.6 Kbps and 115 Kbps. It has a backplane current load of 1.2A at 5V DC and maximum power dissipation of 6.3W. It requires a remote I/O adapter port for connection. For installation, the 1771-DCM requires one slot on the 1771 I/O chassis. Keying bands for placing it in right I/O slots are between pins 16 and 18 for the upper connector and between pins 2 and 4 for the lower connector. For wiring, the 1770-CD Belden 9463 or equivalent cable must be used. The 1771-DCM module has Power, Serial communication, Backplane communication, and Module Fault diagnostics Indicators. It supports serial communication and reads/writes data in parallel form. It has switches for options according to application requirements. It has a communication rate of 57.6K Baud up to 10,000 feet or 115.2K Baud up to 5000 feet. It has an I/O Rack Address and a Rack Size setting option for discrete data transfer. The 1771-DCM has a protected data option to prevent block transfer until the previous data transfer is completed.

The Allen-Bradley 1771-DCM is a Direct Communications module that is part of the 1771 Programmable Logic Controller (PLC) platform. This module is used to establish direct communication between supervisory and local processors via Remote I/O (RIO) communication protocol.

With this module, processors residing in the same RIO network are capable of exchanging information and processing data for the purpose of monitoring and control. It supports RIO transmission speed specifically, 57.6K baud at 10,000 feet of communication cable and 115.2K baud at cable length of 5000 feet. Appropriate cable for use to establish connection between processors using the 1771-DCM is the standard RIO cable specifically, 1770-CD which is the Belden 9463 or any equivalent cable. This module can perform Discrete data transfer wherein up to 7 words + one status word can be exchanged and up to 63 words plus one status word can be transferred using the Block Transfer instruction.

The 1771-DCM may be used with PLC-2/05; PLC-2/15; PLC-2/02; PLC-2/30; PLC-3; PLC-5; PLC-5/250 processors and the 1771-ASB Remote I/O adapter. This module occupies a single-slot of the 1771 chassis. It has eight (8) DIP switches installed within this module which is used to define the operation of this module. Switch 1 is used to set Baud Rate; Switch 2 is unused; Switch 3 defines the last rack of the network; Switch 4 sets the transfer method; Switch 5 is unused; Switch 6 sets data protection while Switch 7 and Switch 8 defines the rack size such as ¼, ½. ¾ and Full rack.





Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1771-DCM is a Direct Communications module. This module is used to implement direct communication between supervisory and local processors via the provided Serial interface that supports Remote I/O (RIO) protocol. This module supports discrete data wherein up to 7 words plus 1 status word may be transferred and block transfer where up to 66 words plus 1 status word may be transferred. It supports a 57.6Kbaud transmission rate using a 10,000 foot cable and 115.2 kbaud with a 5000 foot cable. This module has a backplane current draw of 1.2 Amperes.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1771-DCM
Relative Humidity 5-95 %
Operating temperature 32 to 131oF
Backplane Current 1.2 A
Compatible Keying Between 2 and 14; Between 16 and 18
Response Time 15 ms
Block Transfer data Up to 63 Words + 1 Status Word
Discrete Data Transfer Up to 7 Words + 1 Status Words
Transfer modes Discrete Data Transfer; Block Transfer
Communication cable Belden 9463 or any equivalent
Transmission rate 57.6K baud at 10,000 ft; 115.2K baud at cable length of 5000 feet
Supported Protocol Remote I/O (RIO)
Module Type Direct Communication Module (DCM)
Storage Temperature -40 to 185oF
Number of Bytes 32 Kilobytes
Number of Bits 8 Kilobits
Operation BASIC Programs and C Programs
Communication w/ PLC Processor Block-Transfer w/ PLC-5 Processor
Wiring Arm 1771-WN
Module Scan Time 1.3-5 ms
Coating Conformal Coat
Dimensions 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)

  

 

Information About 1771-DCM

The Allen-Bradley 1771-DCM is a PLC 5 Direct Communication Module. It allows communication between a local processor with the remote I/O scanner port of a supervisory processor by using a remote I/O adapter port across a remote I/O link. It supports two modes of transfer i.e., discrete transfer for up to eight words or block transfer for up to 64 words with 1 status word. A supervisory processor communicates with the 1771-DCM as an adapter module and the local processor communicates over the backplane using block transfer. It has uses in various applications where the transfer of data table values is required. The 1771-DCM module has a communication rate of 57.6 Kbps and 115 Kbps. It has a backplane current load of 1.2A at 5V DC and maximum power dissipation of 6.3W. It requires a remote I/O adapter port for connection. For installation, the 1771-DCM requires one slot on the 1771 I/O chassis. Keying bands for placing it in right I/O slots are between pins 16 and 18 for the upper connector and between pins 2 and 4 for the lower connector. For wiring, the 1770-CD Belden 9463 or equivalent cable must be used. The 1771-DCM module has Power, Serial communication, Backplane communication, and Module Fault diagnostics Indicators. It supports serial communication and reads/writes data in parallel form. It has switches for options according to application requirements. It has a communication rate of 57.6K Baud up to 10,000 feet or 115.2K Baud up to 5000 feet. It has an I/O Rack Address and a Rack Size setting option for discrete data transfer. The 1771-DCM has a protected data option to prevent block transfer until the previous data transfer is completed.

The Allen-Bradley 1771-DCM is a Direct Communications module that is part of the 1771 Programmable Logic Controller (PLC) platform. This module is used to establish direct communication between supervisory and local processors via Remote I/O (RIO) communication protocol.

With this module, processors residing in the same RIO network are capable of exchanging information and processing data for the purpose of monitoring and control. It supports RIO transmission speed specifically, 57.6K baud at 10,000 feet of communication cable and 115.2K baud at cable length of 5000 feet. Appropriate cable for use to establish connection between processors using the 1771-DCM is the standard RIO cable specifically, 1770-CD which is the Belden 9463 or any equivalent cable. This module can perform Discrete data transfer wherein up to 7 words + one status word can be exchanged and up to 63 words plus one status word can be transferred using the Block Transfer instruction.

The 1771-DCM may be used with PLC-2/05; PLC-2/15; PLC-2/02; PLC-2/30; PLC-3; PLC-5; PLC-5/250 processors and the 1771-ASB Remote I/O adapter. This module occupies a single-slot of the 1771 chassis. It has eight (8) DIP switches installed within this module which is used to define the operation of this module. Switch 1 is used to set Baud Rate; Switch 2 is unused; Switch 3 defines the last rack of the network; Switch 4 sets the transfer method; Switch 5 is unused; Switch 6 sets data protection while Switch 7 and Switch 8 defines the rack size such as ¼, ½. ¾ and Full rack.





Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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