Product Name: Digital I/O Modules
Brand Name: Allen Bradley
Model Number:1746-OB32
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen Bradley |
Model Number: |
1746-OB32 |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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The Allen‑Bradley 1746‑OB32 is a 32‑point high‑density digital DC output module engineered for the SLC 500 programmable controller platform. This 1746‑OB32 module provides 32 sourcing transistor outputs organized into two isolated groups of 16 points each, with an operating voltage range of 5 to 50V DC. The 1746‑OB32 delivers fast 0.1 ms ON‑delay response, making it ideal for high‑speed switching applications. With 1500V AC isolation, 8.0A total module current capacity, and Class I Division 2 hazardous location certification, the 1746‑OB32 offers robust and reliable output control for demanding industrial automation environments.
High Channel Density – 32 outputs in a single module maximize I/O capacity per chassis slot, reducing overall system footprint and cost.
Wide Voltage Flexibility – 5 – 50V DC operating range accommodates diverse load requirements from low‑voltage signals to standard 24V DC industrial devices.
Fast Switching Performance – 0.1 ms ON‑delay enables precise control of high‑speed actuators and time‑critical processes.
Group Isolation Architecture – Two isolated groups of 16 outputs each with separate power connections allow mixed load configurations and simplified troubleshooting.
Hazardous Location Ready – UL/CSA Class I, Division 2 certification permits installation in potentially explosive environments without additional barriers.
Multiple Wiring Options – Supports both custom 1746‑N3 connector wiring and pre‑wired 1492 interface systems for flexible field termination.
32 Sourcing Transistor Outputs – Independently addressable DC outputs for driving solenoids, relays, indicator lights, and motor starters.
Two Isolated Output Groups – 16 points per common with separate V DC and DC Com connections per group.
Wide Operating Voltage – 5 – 50V DC sourcing output with 24V DC nominal rating.
High Current Capacity – 0.5A per point continuous, 4.0A per common, 8.0A per module total.
Fast Response Time – 0.1 ms maximum ON‑delay and 1.0 ms OFF‑delay for rapid switching.
1500V AC Isolation – Galvanic isolation between field wiring and backplane logic.
Keyed 40‑Pin Connector – Supplied with female connector and crimp pins for secure, reliable terminations.
Comprehensive Diagnostics – LED indicators per group for output status and fault conditions.
Hazardous Area Certification – Class I, Division 2, Groups A, B, C, D approved.
1492 Wiring System Compatible – Supports pre‑wired cables and interface modules for streamlined installation.
The 1746‑OB32 functions as a high‑density digital output interface between the SLC 500 processor and field‑connected DC loads. Upon receiving logic‑level control signals from the processor via the 5V DC backplane, the module's internal transistor output circuits switch the external DC supply voltage (5 – 50V DC) to the corresponding output terminals. The 32 outputs are organized into two galvanically isolated groups of 16 channels each, with each group having dedicated V DC and DC Com connections.
When a channel is energized by the processor, the sourcing transistor connects the external DC positive supply to the load terminal, driving current through the connected device to the common return. The module supports continuous current up to 0.5A per point, with per‑common limits of 4.0A and per‑module total of 8.0A. Each output group requires both V DC pins to be connected if group current exceeds 2.0A, ensuring adequate current handling capacity.
The module's fast switching characteristics (0.1 ms ON‑delay, 1.0 ms OFF‑delay) enable precise control of high‑speed actuators and time‑critical processes. Series A, B, and C variants include non‑replaceable 2.5A fuses per common for external wiring protection; Series D modules omit fuses for higher current ratings. The 1500V AC optical isolation between field wiring and backplane logic protects the processor from electrical transients and ground loops. All field connections are made via a keyed 40‑pin connector supplied with the module, supporting either custom wiring using included crimp pins or pre‑wired 1492 interface cable systems. The module draws 190 mA from the 5V backplane and requires no 24V backplane current, simplifying system power budget calculations.
Q1: What is the Allen‑Bradley 1746‑OB32 used for?
The 1746‑OB32 is a 32‑point digital DC output module for SLC 500 systems, designed to control solenoids, indicator lights, motor starters, relay coils, and other DC‑powered field devices in industrial automation applications.
Q2: What is the voltage range of the 1746‑OB32?
The 1746‑OB32 operates with a sourcing voltage range of 5 to 50V DC, with a nominal rating of 24V DC. This wide range accommodates both low‑voltage and standard industrial DC loads.
Q3: How many outputs does the 1746‑OB32 provide and how are they grouped?
The 1746‑OB32 provides 32 sourcing transistor outputs organized into two isolated groups of 16 points each. Each group has separate V DC and DC Com connections for flexible load configuration.
Q4: What is the current rating of the 1746‑OB32?
Each output point on the 1746‑OB32 supports 0.5A continuous at 30°C (0.25A at 60°C). Per‑common maximum is 4.0A, and total module current is 8.0A at 0 – 60°C.
Q5: What is the difference between the 1746‑OB32 and 1746‑OB32E?
The 1746‑OB32E variant includes integral electronic protection per channel against short‑circuit and overload conditions, with auto‑reset capability. The standard 1746‑OB32 does not have individual channel electronic protection. Series A/B/C 1746‑OB32 modules include non‑replaceable 2.5A fuses per common for external wiring protection.
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