Allen-Bradley 1746-IV32 SLC 500 32-Channel Digital Input Module
The Allen-Bradley 1746-IV32 is a 32-channel discrete digital input module designed for Allen-Bradley SLC 500 programmable controller systems. It operates as a 24 VDC current sourcing input module featuring thirty-two input channels organized into four groups of eight channels each. This unit interfaces external DC-powered field devices like sensors and switches with the controller backplane while providing robust electrical isolation and built-in noise immunity.
Group Organization and Fusing
The thirty-two input points are divided into four isolated groups of eight points per common. Depending on the specific hardware series, fusing varies: Series A, B, and C include an internal non-replaceable electronic fuse rated at 2.5 A per common group, whereas Series D modules omit internal group fusing.
Electrical Ratings and Signal Characteristics
The module functions across an input voltage range of 15 to 30 VDC at 50 deg C, or 15 to 26.4 VDC at an elevated temperature of 60 deg C. Each input draws a nominal current of 5.1 mA at 24 VDC, with a maximum off-state current of 1.5 mA, a minimum on-state voltage of 15.0 VDC, and a maximum off-state voltage of 5.0 VDC. Signal transition delays are rated at a maximum of 3 ms for both ON and OFF states.
Power Consumption and Environmental Design
Power is supplied via the system backplane, consuming 106 mA (or approximately 0.05 A) at 5 VDC with zero draw from the 24 VDC backplane rail. The unit is built to withstand industrial environments, featuring agency certifications including UL, C-UL, CE, and C-Tick, alongside resistance to operational shocks up to 30G and vibrations up to 2.5G.
| Parameter | Specification |
|---|---|
| Model | 1746-IV32 |
| Brand | Allen-Bradley |
| Product Type | Digital Input Module |
| Series | SLC 500 |
| Number of Inputs | 32 Points |
| Number of Groups | 4 Groups (8 points per common) |
| Input Voltage Range | 15-30 VDC (at 50 deg C) / 15-26.4 VDC (at 60 deg C) |
| Nominal Input Current | 5.1 mA at 24 VDC |
| On-State Voltage, Min | 15.0 VDC |
| Off-State Voltage, Max | 5.0 VDC |
| Off-State Current, Max | 1.5 mA |
| Signal Delay | ON = 3 ms; OFF = 3 ms |
| Backplane Current (5 VDC) | 106 mA (0.05 A) |
| Operating Temperature | 0 to +60 deg C (+32 to +140 deg F) |
| Weight | 1.31 lbs (0.60 kg) |
Frequently Asked Questions
Q: How are the 32 input channels organized on the 1746-IV32 module? A: The 32 inputs are divided into 4 groups of 8 channels each, with each group sharing a common connection point.
Q: Are the internal fuses on the input commons replaceable if an overcurrent event occurs? A: For Series A, B, and C modules, the internal group fuses are non-replaceable electronic fuses. Series D models do not feature internal group fusing.
Q: Can this input module be placed in any slot of an SLC 500 chassis? A: Yes, the 1746-IV32 can be installed in any available slot of a local, extended, or distributed SLC 500 I/O chassis.
Allen-Bradley 1746-IV32 SLC 500 32-Channel Digital Input Module
Allen-Bradley 1746-IV32 SLC 500 32-Channel Digital Input Module
The Allen-Bradley 1746-IV32 is a 32-channel discrete digital input module designed for Allen-Bradley SLC 500 programmable controller systems. It operates as a 24 VDC current sourcing input module featuring thirty-two input channels organized into four groups of eight channels each. This unit interfaces external DC-powered field devices like sensors and switches with the controller backplane while providing robust electrical isolation and built-in noise immunity.
Group Organization and Fusing
The thirty-two input points are divided into four isolated groups of eight points per common. Depending on the specific hardware series, fusing varies: Series A, B, and C include an internal non-replaceable electronic fuse rated at 2.5 A per common group, whereas Series D modules omit internal group fusing.
Electrical Ratings and Signal Characteristics
The module functions across an input voltage range of 15 to 30 VDC at 50 deg C, or 15 to 26.4 VDC at an elevated temperature of 60 deg C. Each input draws a nominal current of 5.1 mA at 24 VDC, with a maximum off-state current of 1.5 mA, a minimum on-state voltage of 15.0 VDC, and a maximum off-state voltage of 5.0 VDC. Signal transition delays are rated at a maximum of 3 ms for both ON and OFF states.
Power Consumption and Environmental Design
Power is supplied via the system backplane, consuming 106 mA (or approximately 0.05 A) at 5 VDC with zero draw from the 24 VDC backplane rail. The unit is built to withstand industrial environments, featuring agency certifications including UL, C-UL, CE, and C-Tick, alongside resistance to operational shocks up to 30G and vibrations up to 2.5G.
| Parameter | Specification |
|---|---|
| Model | 1746-IV32 |
| Brand | Allen-Bradley |
| Product Type | Digital Input Module |
| Series | SLC 500 |
| Number of Inputs | 32 Points |
| Number of Groups | 4 Groups (8 points per common) |
| Input Voltage Range | 15-30 VDC (at 50 deg C) / 15-26.4 VDC (at 60 deg C) |
| Nominal Input Current | 5.1 mA at 24 VDC |
| On-State Voltage, Min | 15.0 VDC |
| Off-State Voltage, Max | 5.0 VDC |
| Off-State Current, Max | 1.5 mA |
| Signal Delay | ON = 3 ms; OFF = 3 ms |
| Backplane Current (5 VDC) | 106 mA (0.05 A) |
| Operating Temperature | 0 to +60 deg C (+32 to +140 deg F) |
| Weight | 1.31 lbs (0.60 kg) |
Frequently Asked Questions
Q: How are the 32 input channels organized on the 1746-IV32 module? A: The 32 inputs are divided into 4 groups of 8 channels each, with each group sharing a common connection point.
Q: Are the internal fuses on the input commons replaceable if an overcurrent event occurs? A: For Series A, B, and C modules, the internal group fuses are non-replaceable electronic fuses. Series D models do not feature internal group fusing.
Q: Can this input module be placed in any slot of an SLC 500 chassis? A: Yes, the 1746-IV32 can be installed in any available slot of a local, extended, or distributed SLC 500 I/O chassis.
