1790-T8BV8VX CompactBlock LDX Expansion Module
Allen‑Bradley 1790-T8BV8VX offers 8 universal inputs and 8 sinking outputs in a compact, non-isolated design. It operates on 24V DC nominal supply and supports DeviceNet communication for flexible system integration.
Technical Specifications
| Brand | Allen‑Bradley |
| Model | 1790‑T8BV8VX |
| Series | CompactBlock LDX |
| Module Type | Expansion Module |
| Inputs | 8 universal (sinking or sourcing), non-isolated |
| Outputs | 8 sinking, non-isolated |
| Nominal Supply Voltage | 24V DC (range 11…28.8V DC) |
| Max Power Dissipation | 1.2 W @ 28.8V DC |
| Input ON‑State Voltage | 9.6V DC min / 24V nom / 28.8V max |
| Input OFF‑State Voltage | ≤5V DC |
| Input Impedance | 4.8 kΩ nominal |
| Output ON‑State Voltage Drop | ≤0.5V DC |
| Output Current Rating | 0.5 A per point, 4.0 A per common |
| Off‑State Leakage | ≤0.5 mA |
| Signal Delay | Off→On: 0.5 ms; On→Off: 1.0 ms |
| Isolation | Photocoupler (I/O to logic), 1250V AC rms |
| Indicators | 8 green per input/output |
| Mounting | Screw mount (M3.0, torque 7 lb‑in max) |
| Altitude | Up to 2,000 m above sea level |
Key Features & Diagnostics
- Built‑in DeviceNet port for seamless network integration.
- Green status LEDs for each I/O point enable instant visual diagnostics.
- Wide temperature and voltage tolerance (10‑28.8V DC field power).
- Supports sinking or sourcing inputs for flexible wiring.
- Photocoupler isolation protects logic from field transients.
- Low output leakage (≤0.5 mA) reduces false triggering.
Installation & Maintenance
- Screw‑mount design with M3.0 terminals simplifies panel mounting.
- Removable terminal block (torque 7 lb‑in) for quick wiring changes.
- No special tools required for routine checks.
- LED indicators allow fast troubleshooting without a multimeter.
- Compact footprint fits tight control cabinets.
Compatibility & Certifications
- Works with CompactBlock LDX base and expansion racks.
- DeviceNet communication protocol (non‑isolated).
- Meets 1250V AC rms isolation (I/O to logic).
- CE marked, UL listed for industrial environments.
- RoHS compliant.
Typical Applications
- Discrete control in packaging and material handling.
- Actuator and sensor interfacing in automated assembly lines.
- Remote I/O nodes for DeviceNet networks.
- Replacement/upgrade for legacy 24V DC systems.
Diagnostic Capabilities
- Per‑point green LED indicates ON‑state status.
- DeviceNet communication status via network scanner.
- Short‑circuit and over‑current protection on outputs (internal).
- Field power loss detection (LED off).
Frequently Asked Questions
Q: Can I use this module with a 12V DC supply?
A: Yes, voltage range is 11‑28.8V DC, but note input ON‑state min is 9.6V.
Q: Are the outputs isolated from each other?
A: No, they share a common (8 points/8 COM) and are non‑isolated.
Q: What wire size is suitable?
A: Use copper or copper‑clad aluminum conductors, M3.0 screws, 7 lb‑in torque.
Q: Does it support sourcing outputs?
A: No, outputs are sinking only. Inputs can be sinking or sourcing.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spares.
- Global shipping via FedEx, UPS, DHL.
- Tested surplus & refurbished options available.
- 12‑month warranty on all modules.
- Every unit receives technical verification before shipment.
- Expert support for obsolete control systems.
Contact us: info@oiltechcontrols.com | +86 158 8020 0923 (WhatsApp)
Packing & Warranty
- Includes: module, terminal block, mounting screws, quick‑start guide.
- 12‑month warranty against manufacturing defects.
- Shipping: FedEx, UPS, DHL – tracking provided.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
- No battery needed – eco-friendly design
- Works in tough conditions (0-60°C)
- Supports multiple industrial networks
Technical Specifications
- Brand: Allen-Bradley
- Model: 1756-L84E (ControlLogix 5580)
- Memory: 20MB user + 2GB SD expandable
- Speed: 1000Mbps Ethernet, 12Mbps USB
- Power Use: 6.2W (1.2mA @5.1V)
- Weight: Only 0.394kg
- Shock Proof: 30G operating shock
- Humidity: 5-95% non-condensing
- Networks: EtherNet/IP, DeviceNet, ControlNet
Common Questions
- How many devices can connect via Ethernet? Supports up to 250 nodes
- What software is needed? Studio 5000 Logix Designer v3.0+
- Is motion control supported? Yes, via EtherNet/IP
- What chassis does it fit? All 1756 series (A4 to A17K)
- How is data backup handled? Uses SD card, no battery required
What You Get
- 1756-L84E Controller
- Installation hardware
- Documentation
Support & Services
- 12-month quality guarantee
- Fast global shipping options
- Download complete specifications
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