Products Description
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Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Allen-Bradley 1756-OF8IHK |
| Product Type | ControlLogix Analog Output Module (HART) |
| Manufacturer | Rockwell Automation / Allen-Bradley |
| Series | ControlLogix 1756 |
| Module Function | Analog Current Output |
| Number of Channels | 8 outputs |
| Output Signal Range | 0–20 mA / 4–20 mA |
| Output Type | Current sourcing, HART-capable |
| Resolution | ~15-bit (typical across 24 mA range) |
| Accuracy | Approx. ±0.15% @ 25°C (typical) |
| HART Support | Yes |
| Isolation Voltage | 250 V continuous (reinforced insulation, backplane isolation) |
| Load Resistance | Approx. 50–750 Ω |
| Output Protection | Electronic current limiting (short-circuit protection) |
| Update Time | < 23 ms (HART disabled), up to ~100 ms (HART enabled) |
| Backplane Current | Approx. 220 mA @ 5.1 V DC |
| Power Dissipation | Approx. 6.5 W |
| Wiring Type | 2-wire shielded copper, terminal block |
| Terminal Base | 1756-TBCH / 1756-TBS6H compatible |
| Module Keying | Electronic / software configurable |
| Conformal Coating | Yes |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Shock / Vibration | Industrial IEC-rated (up to 30G shock operating) |
| Mounting Type | ControlLogix chassis slot-mounted |
| Dimensions | Approx. 145 × 140 × 105 mm |
| Weight | Approx. 0.9–1.1 kg |
| Certifications | CE, UL, CSA, ATEX, KC, RCM |
FAQ
FAQ
Q1: What is the 1756-OF8IHK used for?
It is an 8-channel analog current output module used in ControlLogix systems to drive field devices such as valves, actuators, and process instrumentation.
Q2: Does it support HART communication?
Yes, it supports HART protocol for bidirectional communication with smart field devices.
Q3: What signal range does it output?
It outputs standard industrial current signals of 4–20 mA and 0–20 mA.
Q4: How many channels does it have?
The module provides 8 independently controlled analog output channels.
Q5: What type of loads can it drive?
It can drive loads typically in the 50 to 750 ohm range, depending on configuration.
Q6: Is the module isolated?
Yes, it provides reinforced isolation (250 V continuous) between outputs and backplane.
Q7: What is the typical accuracy?
It has a typical accuracy of about ±0.15% at 25°C under standard conditions.
Q8: Where is this module commonly used?
It is commonly used in process control industries such as oil & gas, chemical plants, and industrial automation systems requiring precise analog control.
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Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
