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Allen-Bradley 1790-0W8X CompactBlock LDX 8-Point Relay Output Expansion Module – Technical Specifications and FAQ
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Manufacturer | Rockwell Automation |
| Model | 1790-0W8X |
| Product Series | CompactBlock LDX |
| Product Name | 8-Point Relay Output Expansion Module |
| Product Type | Digital relay output expansion module |
| Communication Network | DeviceNet |
| Number of Outputs | 8 relay outputs |
| Relay Type | Form A, normally open (SPST) |
| Output Type | AC/DC relay output |
| DC Switching Voltage | 5–24 V DC |
| AC Switching Voltage | Up to 30 V AC |
| Maximum Output Current | 2 A per output (resistive load) |
| Output Isolation | Relay-isolated outputs |
| Connection Type | 37-pin D-shell connector |
| Status Indicators | 8 green output status indicators |
| Expansion Type | CompactBlock LDX expansion module |
| Mounting | Compatible CompactBlock LDX base |
| Country of Origin | Not confirmed; verify product nameplate |
| Lifecycle Status | Discontinued; verify exact product lifecycle with Rockwell |
| Dimensions (H × W × D) | Approx. 104 × 42 × 52 mm (supplier-listed) |
| Weight | Approx. 0.1 kg net (supplier-listed; another supplier lists 0.5 kg) |
FAQ
FAQ
Q1: What is the Allen-Bradley 1790-0W8X used for?
A: It is an 8-point relay output expansion module designed to add switching capacity to a compatible CompactBlock LDX DeviceNet I/O system.
Q2: How many relay outputs does it provide?
A: It provides eight independently controlled, normally open Form A relay outputs.
Q3: What voltage can the relay outputs switch?
A: The product is identified as a 30 V AC / 24 V DC relay output module. The maximum switching current is 2 A per output for resistive loads.
Q4: What power supply does the module require?
A: It requires a 24 V DC field supply, with an allowable voltage range of 19.2–28.8 V DC.
Q5: What type of connector does the 1790-0W8X use?
A: It uses a 37-pin D-shell connector. It is designed for the compatible D-shell CompactBlock LDX expansion system.
Q6: Does it provide electrical isolation?
A: Yes. It uses photocoupler isolation between the I/O circuitry and the logic circuitry, rated at 1250 V AC RMS.
Q7: Is the 1790-0W8X discontinued?
A: The exact D-shell model’s lifecycle status could not be confirmed from a dedicated Rockwell product page. Do not confuse it with the similar 1790-T0W8X terminal-block model, which Rockwell lists as discontinued effective December 31, 2024.
Q8: What are the dimensions and weight for shipping?
A: The published product profile gives dimensions of approximately 104 × 42 × 52 mm and an expansion-block weight of approximately 0.1 kg. Allow additional space and weight for protective export packaging.
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Packing & Delivery
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