Allen-Bradley 1756-OX8I ControlLogix Isolated Relay Output Module
Spécifications techniques
Manufacturer: Allen Bradley
Condition：New with Original Package
Product Type: Digital Output Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
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Product Description
Configured for isolated relay output switching in the ControlLogix system, the Allen-Bradley 1756-OX8I (1756-OX8I Digital Output Module) provides direct physical and electrical execution for discrete contact control operations. The module provides 8 normally open and 8 normally closed individually isolated outputs with relay-based switching capability.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-OX8I |
| Brand | Allen-Bradley |
| Product Type | Digital Relay Output Module |
| System Platform | ControlLogix |
| Origin | USA |
| Operating Temp | 0 to 60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | 2.9 W backplane power |
| Maximum Power Dissipation | 3.1 W at 60 deg C |
| Thermal Dissipation | 10.57 BTU/hr |
| Output Configuration | 8 N.O. and 8 N.C. individually isolated outputs |
| Output Isolation | Two points per group |
| Pilot Duty Rating | C300/R150 |
| Operating Voltage Range | 5 to 125 VDC; 10 to 240 VAC |
| Contact Current Rating | 1 A at 5 to 30 VDC; 0.5 A at 48 VDC; 0.22 A at 125 VDC; 1.5 A at 120 VAC; 0.75 A at 240 VAC |
| Output Delay Time | 13 ms maximum Off to On; 13 ms maximum On to Off |
| Current Draw | 100 mA at 5.1 V; 100 mA at 24 V |
| Off-State Leakage Current | 0 mA maximum per point |
| Minimum Load Current | 10 mA per point |
| Initial Contact Resistance | 100 mOhm maximum at 6 V, 1 A |
| Switching Frequency | 1 operation per 3 s maximum at rated load |
| Contact Bounce Time | 1.2 ms mean |
| Contact Life | 300 kHz resistive; 100 kHz inductive |
| Scheduled Output Synchronization | Within 16.7 s maximum reference to Coordinated System Time |
| Fault Mode State | Hold last state, On, or Off; Off default |
| Program Mode State | Hold last state, On, or Off; Off default |
| Isolation Voltage | 250 V continuous, basic insulation type |
| Routine Dielectric Test | 1350 VAC for 2 s |
| Terminal Block Compatibility | 1756-TBCH, 1756-TBS6H |
| Slot Width | 1 slot |
| Wire Category | Category 1 |
| Enclosure Type | Open-style |
| Humidity Range | 5 to 95% noncondensing |
| Vibration Resistance | 2 g at 10 to 500 Hz |
| Operating Shock | 30 g |
| Nonoperating Shock | 50 g |
| EMC Emissions | CISPR 11 Class A |
| ESD Immunity | 6 kV contact discharge, 8 kV air discharge |
| Radiated RF Immunity | 10 V/m from 80 to 2000 MHz; 3 V/m from 2000 to 2700 MHz |
EtherNet/IP and ControlLogix I/O Architecture Integration
The 1756-OX8I operates within the ControlLogix chassis architecture through the backplane bus interface. Therefore, the module exchanges output command data with the controller while maintaining isolated relay contact switching at the field interface. In addition, the module supports I/O density scaling through the ControlLogix platform, allowing engineers to configure relay output channels alongside other digital and analog modules.
The module uses electronic keying and software configuration to reduce incorrect module placement during system installation. Furthermore, the open-style construction requires appropriate enclosure selection according to the installed environment and local electrical standards.
Frequently Asked Questions
Q: Does the 1756-OX8I provide electrical isolation between output channels?
A: Yes. The module provides individually isolated normally open and normally closed relay outputs, with output-to-output and output-to-backplane isolation rated at 250 V continuous.
Q: Can the 1756-OX8I switch both AC and DC loads?
A: Yes. The module supports relay contact switching for 5 to 125 VDC and 10 to 240 VAC applications within the specified current limits.
Q: Is the 1756-OX8I output protected by internal fusing?
A: No. The module does not include output protection fuses. An external fused interface module is recommended for output circuit protection.
Field Installation Guidelines
Install the 1756-OX8I in a compatible ControlLogix chassis slot and verify the chassis power capacity before module insertion.
Use the recommended removable terminal blocks, including 1756-TBCH or 1756-TBS6H, for field wiring termination. Maintain proper separation between relay output wiring and low-level signal wiring to reduce electrical interference.
Connect external protection devices according to the load characteristics because the module does not provide integrated output fusing. For inductive loads, apply suitable suppression components near the field device to reduce contact stress and switching noise.
Verify conductor routing requirements using the applicable industrial automation wiring guidelines. Ensure grounding, shielding, and enclosure practices comply with the installation environment and electrical codes.
Other Attributes
- Series: Allen-Bradley ControlLogix
- Country of Origin: USA
- Lead Time: In Stock, 2 Working Days
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Question 2: What Is The Warranty Period?
We offer a standard one-year warranty for all new and original items.
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