Replacing ABB DSQC 351: Controller and Network Checks
Checks to record before replacing ABB 3HNE 00006-1 DSQC 351: controller generation, X3/X5/X20/X21 wiring, DeviceNet settings, INTERBUS mapping, and LED states.
Manufacturer: Allen-Bradley
Product No.: 1756-DHRIO
Country of origin:United States
Product Type: Communication Module
Payment: T/T, Western Union
Weight: 350g
Dimensions: 14.5 x 11.2 x 3.5 cm
Shipping port: Xiamen
Warranty: 12 months
The Allen-Bradley 1756-DHRIO is a dual-channel ControlLogix communication module for Data Highway Plus and Remote I/O networks.
The recorded specification includes 57.6, 115.2 and 230.4 Kbps rates, 32 DH+ messages per channel, and 32 logical RIO rack connections per channel.
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Catalog Number / SKU | 1756-DHRIO |
| Module Type | DH+ and Remote I/O Communication Module |
| Backplane Current Draw | 1.7 mA at 5 VDC, 850 mA at 24 VDC |
| Power Dissipation | 4.5 W max |
| Thermal Dissipation | 15.4 BTU/hr max |
| Communication Rates | 57.6 Kbps, 115.2 Kbps, 230.4 Kbps |
| DH+ Connections | 32 messages per DH+ channel |
| RIO Connections | 32 logical rack connections per RIO channel, 16 block-transfer connections |
| Logix Connections | 32 max |
| Conductor Compatibility | Belden 9463 twinaxial cable |
| Enclosure Type | ControlLogix Single-Slot Module |
| Country of Origin | United States |
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Returns & Warranty

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Returns & Warranty
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| Country of origin |
United States
|