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Allen-Bradley 1756-OF8HK ControlLogix 8-Point HART Analog Output Module – Technical Specifications and FAQ
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley (Rockwell Automation) |
| Model | 1756-OF8HK |
| Product Type | ControlLogix Analog Output Module |
| Module Function | HART Analog Voltage / Current Output |
| Number of Outputs | 8 channels |
| Output Configuration | Eight voltage or current outputs |
| Output Signal Ranges | ±10 V, 0–20 mA, 4–20 mA |
| Output Voltage Range | -10 to +10.4 V |
| Output Current Range | 0–20 mA / 4–20 mA |
| Resolution | 15–16 bits |
| HART Communication | Supported; one HART modem per module |
| Backplane Current at 5.1 V DC | 230 mA |
| Backplane Current at 24 V DC | 230 mA |
| Total Backplane Power | 6.54 W |
| Power Dissipation | 4.92 W |
| Thermal Dissipation | 16.78 BTU/hr |
| Isolation Voltage | 50 V continuous, basic insulation between output channels and backplane |
| Channel-to-Channel Isolation | No isolation between individual output channels |
| Overvoltage Protection | 24 V DC |
| Compatible Terminal Blocks | 1756-TBNH or 1756-TBSH |
| Conformal Coating | Yes |
| Mounting | ControlLogix 1756 chassis |
| Operating Temperature | 0 to 60°C |
| Storage Temperature | -40 to 85°C |
| Relative Humidity | 5–95%, non-condensing |
| Dimensions (H × W × D) | Approx. 145 × 35 × 145 mm; estimated module dimensions |
| Weight | Approx. 0.30 kg; estimated, excluding terminal block and packaging |
| Country of Origin | USA (Rockwell Automation listing; actual manufacturing location should be checked on the product label) |
| Lifecycle Status | Active |
FAQ
FAQ
Q1: What is the Allen-Bradley 1756-OF8HK used for?
A: It is an 8-channel analog output module used in ControlLogix systems to send voltage and current control signals to field instruments and other devices.
Q2: How many output channels does the 1756-OF8HK have?
A: It has eight analog output channels, configurable for voltage or current signals.
Q3: Does the 1756-OF8HK support HART communication?
A: Yes. It supports HART communication through one HART modem per module.
Q4: What output signal ranges does this module support?
A: It supports ±10 V voltage output and 0–20 mA or 4–20 mA current output.
Q5: Is the 1756-OF8HK conformally coated?
A: Yes. The K suffix identifies the conformal-coated version, providing additional protection against environmental contaminants.
Q6: Is the 1756-OF8HK output-channel isolated?
A: No. The module has no isolation between individual output channels. It provides 50 V continuous basic insulation between the output channels and the backplane.
Q7: What are the dimensions and weight of the 1756-OF8HK?
A: Approximate dimensions are 145 × 35 × 145 mm (H × W × D), and the listed weight is approximately 0.45 kg, excluding packaging.
Q8: Is the 1756-OF8HK still available?
A: Yes. Rockwell Automation currently lists the 1756-OF8HK as an active product.
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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.
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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.
