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GE / IP FANUC Series 90/30 In Stock

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Includes a PDF Electric and Supply warranty.

(Never Used)


1 In Stock

3 Yr PDF Supply warranty

What is Surplus?



15 In Stock

2 Yr PDF Supply Warranty

What is Refurbished?

Repair Service


5-10 Days

2 Yr PDF Supply warranty


Other Available Revisions for the 1756-DHRIO 1756-DHRIO/A1756-DHRIO/B1756-DHRIO/C1756-DHRIO/D1756-DHRIO/E

Common misspellings:
  • l756-DHRIO
  • 1756-DHR1O
  • 1756-DHRlO
  • 1756-DHRI0
  • 1756DHRIO

The Allen-Bradley/Rockwell Automation 1756-DHRIO communication module from the ControlLogix series of products falls under the remote I/O network module category. The 1756-DHRIO is a versatile Data Highway Plus/Remote I/O module with 57.6, 115.2, and 230.4 kilobytes per second communication rates. This remote I/O communication module is a remote I/O scanner-only version and it features 32 logical rack connections per remote I/O channel of remote I/O and 16 block-transfer connections per channel of remote I/O. This communication module supports up to 32 connections. The insulation voltage functionality includes 30 Volts continuous voltage, standard insulation, DHRIO A and a port for programming to DHRIO B , and DHRIO A/B at the backplane. It is important to note that isolation between the DHRIO A and the port for programming is not provided and the isolation type is tested at 877 Volts DC for 60 seconds. The 1756-DHRIO requires slot width of 1 and it can be installed in any slot on the chassis.

The 1756-DHRIO ControlLogix communication module can be used with chassis models with catalog numbers 1756-A4/A7/A10/A13 or -A17. Also, it can be used with standard (1756-PA72/C/PA75/B/PB72/C/PB75/B/PC75/B or -PH75/B) or redundant (1756-PA75R/PB75R or PSCA2) power supplies. In regard to power-related features, the 1756-DHRIO has 850 mA of current draw at 5.1 Volts DC, 1.7 mA of current draw at 24 Volts DC, and a power dissipation of only 4.5 Watts. Besides that, the 1756-DHRIO has thermal dissipation of 15.4 BTU per hour. In addition, the 1756-DHRIO module has two (2) ports which can be selected individually for either DH+ or remote I/O. The enclosure of the module is not rated since it is an open-style enclosure, and it has a T4A North American temperature code and a T4 IEC temperature code. The operation temperature of the module should be between 0 and 60 degrees Celsius or 32 and 140 degrees Fahrenheit while the storage temperature ranges from -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). The module can also withstand 5 to 95% non-condensing relative humidity.

AB ControlLogix Scanner Module DHRIO

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PDF Electric & Supply Inc. sells new, new surplus and refurbished products which are sourced through independent channels. All warranties and support, if applicable, are with PDF Electric & Supply Inc. and not the manufacturer. PDF Electric & Supply Inc. is not an authorized distributor or representative for the listed manufacturers and makes no representations as to any quality control performed by any listed manufacturer on the products. The products listed on this website may vary as to their country of origin; the accessories, and other items included with the product; and the language used on the packaging, the parts, and any related instructions or printed material related to the products. This website is not sanctioned or approved by any manufacturer or tradename listed. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.