The Allen-Bradley 1756-OF8H ControlLogix Analog Output HART Current/Voltage Module is a high-reliability I/O solution designed for precise analog output control in complex process automation environments. This 8-channel module delivers industry-standard current and voltage signals while supporting HART protocol for bidirectional communication with intelligent field devices such as transmitters and positioners. Engineered for scalability, the 1756-OF8H integrates seamlessly into ControlLogix chassis, offering galvanic isolation per channel to protect against ground loops and noise. Its robust construction and advanced diagnostics ensure consistent performance in harsh industrial settings, making it ideal for oil and gas, chemical, and power generation applications.
| Parameter |
Specification |
| Product Type |
Analog Output HART Module |
| Series |
ControlLogix |
| Model Number |
1756-OF8H |
| Number of Output Channels |
8 (individually isolated) |
| Output Signal Ranges |
0-20 mA, 4-20 mA, ±10 VDC, 0-10 VDC |
| Resolution |
16-bit D/A converter |
| HART Protocol |
HART pass-through (Bell 202 standard), supports multi-drop |
| Update Rate |
8 ms per channel (typical) |
| Isolation Voltage |
1500 VDC channel-to-backplane, 500 VDC channel-to-channel |
| Backplane Current (5V) |
300 mA |
| Backplane Current (24V) |
80 mA (module power), plus field loop power |
| Field Power Requirement |
24 VDC nominal (19.2 to 31.2 VDC), 150 mA per channel max |
| Accuracy |
±0.05% of full scale (at 25°C) |
| Temperature Drift |
±50 ppm/°C typical |
| 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 |
| Chassis Compatibility |
1756-A4, A7, A10, A13, A17, A21 (ControlLogix standard chassis) |
| Indicators |
Module status (OK), channel status (individual), HART activity |
| Firmware Compatibility |
ControlLogix version 20 or later (with appropriate HART driver) |
| Certifications |
CE, UL, CSA, ATEX (Zone 2), IECEx |
| Weight |
Approximately 0.4 kg (0.88 lbs) |
| Dimensions (H x W x D) |
144 mm x 35 mm x 129 mm (5.67 in x 1.38 in x 5.08 in) |
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