Product Name:Digital I/O Modules
Brand Name: Allen Bradley
Model Number:1746-IB32
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Allen Bradley |
Model Number: |
1746-IB32 |
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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Contact in Whatsapp: |
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Parameter |
Specification |
|
Catalog Number |
1746-IB32 |
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Module Type |
32-Channel Digital DC Input Module |
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Voltage Category |
24V dc |
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Number of Inputs |
32 |
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Points per Common |
8 (four isolated groups) |
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Operating Voltage |
15 to 30V dc at 50°C; 15 to 26.4V dc at 60°C |
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Input Type |
Sinking input (requires sourcing field devices) |
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On-State Voltage (min.) |
15.0V dc |
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Off-State Voltage (max.) |
5.0V dc |
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Off-State Current (max.) |
1.5 mA |
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Nominal Input Current (at 24V) |
5.1 mA |
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Input Signal Delay (max.) |
ON = 3 ms; OFF = 3 ms |
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Backplane Current (5V dc) |
0.050A |
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Backplane Current (24V dc) |
0A |
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Isolation (Backplane) |
1500V ac for 1 min. |
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Fuse Type |
Series A/B/C: 2.5A non-replaceable fuse per common; Series D: not fused |
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Heat Dissipation (Total) |
6.65 Watts |
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Module Location |
SLC 500 chassis (slot 0 reserved for processor or remote I/O adapter) |
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Connector Type |
40-pin male header; keyed female connector included |
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Agency Certification |
CSA Class I Division 2 Groups A-D, UL listed, CE marked for applicable directives |
The 1746-IB32 is a 32-channel DC input module from Allen-Bradley's SLC 500 family, engineered to interface field devices such as limit switches, pushbuttons, and proximity sensors with the programmable controller. As a sinking input module, the 1746-IB32 accepts 24V dc signals from sourcing devices, converting them to logic levels for the processor. With 32 points arranged in four isolated groups of eight, the 1746-IB32 offers high-density I/O for space-constrained applications. The module provides 3 ms signal delay, 1500V isolation, and status LEDs for each channel, ensuring reliable operation in demanding industrial environments.
Machine Control Systems – Monitoring limit switches, pushbuttons, selector switches, and float switches in manufacturing equipment and packaging machinery
Conveyor Systems – Sensing product presence, position, and jam detection using photoelectric sensors and proximity switches
Material Handling – Interfacing with pallet position sensors, hoist limit switches, and automated guided vehicle (AGV) docking sensors
Industrial Automation Networks – Deploying in SLC 500 remote I/O racks connected via 1747-ASB Remote I/O Adapters for distributed control architectures
Assembly Line Monitoring – Detecting component presence, tool position, and safety interlock status in automated assembly operations
Process Control – Monitoring tank levels, valve position feedback, and pump run status in batch processes and continuous processing lines
32 High-Density Inputs – Provides 32 sinking DC inputs in a single SLC 500 chassis slot, maximizing I/O density for space-constrained panels
Four Isolated Groups – 8 points per common with 1500V ac isolation between groups, allowing independent field power sources and enhanced noise immunity
Wide Operating Voltage Range – Accepts 15 to 30V dc inputs, accommodating variations in field power supplies and cable voltage drops
Fast Signal Response – 3 ms maximum ON and OFF delay enables precise detection of rapid machine events
Comprehensive Status Indicators – 32 red LEDs provide real-time visual indication of each input channel's ON/OFF state
Hazardous Location Certified – CSA Class I Division 2 Groups A-D and UL listed for use in potentially explosive atmospheres
Flexible Wiring Options – Supports 1746-N3 40-pin connector for custom wiring or 1492 pre-wired cables and interface modules for simplified installation
Octal Label Kit Compatible – Supports octal addressing for PLC systems via optional octal label kit (available based on module catalog number)
Modular Installation – Self-locking tabs enable quick module removal and replacement without tools
The 1746-IB32 functions as the interface between field input devices and the SLC 500 processor. Field devices such as pushbuttons or proximity switches connect to the module's input terminals. When a sourcing field device is energized, it provides a positive DC voltage (15–30V dc) to the input point, which then sources current through the module's internal opto-isolator to the common (CM) terminal. The opto-isolator converts the field voltage signal to a logic-level signal that the processor reads via the backplane. Each channel includes a 3 ms debounce filter to prevent false triggering from contact bounce or electrical noise. The 32 inputs are arranged in four isolated groups of eight, each group having its own common (CM) terminal, allowing different field power supplies for each group. In Series A, B, and C modules, a 2.5A non-replaceable fuse per common protects external wiring from overcurrent. Series D modules are not fused and offer improved current handling. The module continuously scans its inputs, updating the processor's input data table at the chassis scan rate.
Q1: What is the difference between Series A/B/C and Series D versions of the 1746-IB32?
A1: Series A, B, and C versions feature a non-replaceable 2.5A fuse per common to protect external wiring. Series D modules do not have these fuses and are not fused.
Q2: How do I address the 1746-IB32 in an SLC 500 system?
A2: In an SLC system, addressing uses decimal numbering (0-31). In a PLC system with a 1747-ASB Remote I/O Adapter, octal addressing (00-37) is used. An octal label kit is available to convert the module's decimal labels to octal addressing.
Q3: Can the 1746-IB32 be used with sourcing or sinking field devices?
A3: The 1746-IB32 is a sinking input module, meaning it requires sourcing field devices that provide a positive voltage to the input terminal. The module's internal circuit completes the path to the common terminal.
Q4: What is the maximum operating temperature for this module?
A4: The 1746-IB32 operates at 15 to 30V dc at temperatures up to 50°C. At 60°C, the allowable input voltage range is derated to 15 to 26.4V dc.
Q5: How is the 1746-IB32 isolated from the backplane?
A5: The module provides 1500V ac isolation (for 1 minute) between the field wiring and the backplane, protecting the processor from voltage transients and ground loops.
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