The Allen-Bradley 1794-OB8 is a field-proven FLEX I/O discrete output module engineered for reliable, high-density control in demanding industrial environments. Designed to interface directly with 24V DC sourcing actuators, solenoids, and indicator lamps, this module delivers eight independent outputs with a robust 0.5A rating per channel. Each output features built-in short-circuit and overcurrent protection, ensuring system integrity even in harsh plant-floor conditions. The 1794-OB8 supports seamless integration with ControlLogix, CompactLogix, and other Rockwell Automation controllers via the FLEX I/O communication adapter, making it a versatile choice for distributed I/O architectures. Its compact, DIN-rail-mountable form factor reduces panel space while providing clear LED status indicators for rapid troubleshooting. Whether deployed in manufacturing, process control, or material handling systems, the 1794-OB8 ensures consistent, high-speed switching with a typical turn-on time of less than 1 ms. Backed by Allen-Bradley’s rigorous quality standards, this module is engineered for long-term reliability in continuous-duty applications.
| Parameter |
Specification |
| Model |
1794-OB8 |
| Product Type |
Discrete Output Module |
| Series |
FLEX I/O |
| Number of Outputs |
8 (sourcing) |
| Output Voltage Range |
24V DC (nominal), 10-31.2V DC operating |
| Output Current per Channel |
0.5A (continuous), 2A for 10 ms (inrush) |
| Total Output Current (Module) |
4A (all channels on) |
| Output Type |
Solid-state, sourcing (PNP) |
| Load Type |
Resistive, inductive, lamp |
| Off-State Leakage Current |
< 1 mA at 24V DC |
| Turn-On Time |
Typical 0.5 ms, max 1 ms |
| Turn-Off Time |
Typical 0.5 ms, max 1 ms |
| Protection |
Short-circuit (electronic), overcurrent (per channel), reverse polarity (power supply) |
| Isolation Voltage |
50V DC (continuous) between output and backplane, 1500V AC (test) for 1 s |
| Power Supply Voltage |
24V DC (module power via backplane) |
| Power Consumption |
3.5W typical (all outputs on) |
| Current Draw from Backplane |
140 mA at 5V DC |
| Indicators |
8 green LED output status, 1 green/red module status |
| Wiring |
Removable terminal block, 12-24 AWG |
| Operating Temperature |
0°C to +60°C (32°F to +140°F) |
| Storage Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Relative Humidity |
5% to 95% non-condensing |
| Vibration Resistance |
5 g Standard Models 10-500 Hz (IEC 60068-2-6) |
| Shock Resistance |
30 g (IEC 60068-2-27) |
| Enclosure Type |
Open-type (NEMA 1, IP20 typical) |
| Mounting |
DIN rail (35 mm) or panel mount via FLEX I/O base |
| Dimensions (H x W x D) |
94 mm x 45 mm x 75 mm (3.7 in x 1.77 in x 2.95 in) |
| Weight |
Approx. 120 g (0.26 lb) |
| Certifications |
CE, cULus, CSA, ATEX (Zone 2), IECEx (depending on variant) |
| Warranty |
Standard Rockwell Automation 2-year warranty |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22