Allen‑Bradley 1790D-T0W6 Technical Guide – Installation & Maintenance
1790D-T0W6 Product Introduction
The Allen‑Bradley 1790D-T0W6 belongs to the 1790D Compact I/O series. Specifically, this module provides six 24V DC digital input channels. Each channel handles sink or source wiring configurations. You can mount the 1790D-T0W6 on a DIN rail directly. Moreover, the module communicates via DeviceNet protocols. Therefore, it integrates easily with Logix controllers and other Allen‑Bradley PLCs. Additionally, the 1790D-T0W6 supports auto‑addressing to reduce setup time.
Core Value
Firstly, the Allen‑Bradley 1790D-T0W6 reduces wiring complexity. Its removable terminal block simplifies field connections. Secondly, this module offers high noise immunity for industrial environments. Consequently, you get stable signal acquisition near motors or drives. Thirdly, the 1790D-T0W6 lowers overall project costs. You avoid extra junction boxes because the module fits inside small enclosures. Furthermore, its hot‑swappable design minimizes downtime during replacements. Specifically, field engineers value the diagnostic LEDs that indicate channel status instantly.
Technical Insights
The 1790D-T0W6 operates at 24V DC nominal voltage. Input voltage range spans from 10V to 28.8V DC. Each channel draws only 7 mA typical. The module supports an input delay of 1 to 15 ms. You can adjust this delay via configuration software. Meanwhile, the backplane current draw sits at 40 mA. Isolation voltage reaches 50V DC between field side and logic side. For environmental limits, the 1790D-T0W6 works from 0°C to 55°C. Storage temperature ranges from -40°C to 85°C. Humidity tolerance is 5% to 95% non‑condensing. Therefore, this module suits most manufacturing floors and remote I/O panels.
Installation & Maintenance
To install the Allen‑Bradley 1790D-T0W6, follow these steps. Firstly, mount the module on a standard 35 mm DIN rail. Ensure the rail clips lock firmly. Secondly, connect the DeviceNet cable to the open connector. Then apply 24V DC power to the module. Thirdly, wire your field devices to the six input terminals. Use shielded cable for long runs. For maintenance, inspect terminal screws every six months. Additionally, clean the module with compressed air. If an input channel fails, test the voltage at the terminal first. Replace the 1790D-T0W6 only if the diagnostic LED remains off after power cycling.
Buyer’s Guide FAQ
1. What is the Allen‑Bradley 1790D-T0W6 used for?
This module reads digital input signals from sensors, pushbuttons, or limit switches. It sends these signals to a DeviceNet master controller.
2. Can the 1790D-T0W6 work with non‑Rockwell controllers?
Yes, as long as the controller supports standard DeviceNet communication. However, full diagnostic features require Allen‑Bradley PLCs.
3. What is the maximum cable length for inputs on the 1790D-T0W6?
For 24V DC signals, keep cable length under 300 meters. Use shielded cable in high‑noise areas.
4. How do I address the 1790D-T0W6 on DeviceNet?
Set the node address using the rotary switches on the module side. Valid addresses range from 0 to 63.
5. Does the 1790D-T0W6 support sinking and sourcing inputs?
Yes, each channel accepts both sinking and sourcing wiring. You do not need different modules for each type.
