Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
The Allen-Bradley 1734-IB4 is a 4-point sinking digital input module designed for the POINT I/O system. The 1734-IB4 interfaces field-side sensor devices—such as 2-wire or 3-wire proximity switches—with a central controller over I/O networks like DeviceNet, PROFIBUS, ControlNet, or EtherNet/IP via compatible adapters. Receiving 24V DC discrete signals, it produces 1 byte of input data for processor memory mapping.
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Country of Origin | Singapore |
| Inputs per Module | 4 (1 group of 4), sinking |
| On-State Voltage, Nom | 24V DC |
| On-State Voltage Range | 10...28.8V DC |
| On-State Current, Nom | 4 mA @ 24V DC |
| On-State Current, Max | 5 mA |
| Off-State Voltage, Max | 5V DC |
| Off-State Current, Min | 1.5 mA |
| Input Impedance, Nom | 3.6 kOHM |
| Input Impedance, Max | 4.7 kOHM |
| Input Filter Time (Off-to-On) | 0.5 ms hardware plus 0...63 ms (user-selectable) |
| Input Filter Time (On-to-Off) | 0.5 ms hardware plus 0...63 ms (user-selectable) |
| Field Power Supply Voltage, Nom | 24V DC |
| Field Power Voltage Range | 10...28.8V DC |
| POINTBus Current, Max | 75 mA @ 5V DC |
| Power Dissipation @ 28.8V DC, Max | 1.0 W |
| Thermal Dissipation @ 28.8V DC, Max | 3.4 BTU/hr |
| Isolation Voltage | 50V (continuous), Reinforced Insulation Type (Tested @ 2500V DC for 60 s, field-side to system) |
| Keyswitch Position | 1 |
| Terminal Base Screw Torque | 0.8 N-m (7 lb-in) |
| Enclosure Type Rating | None (open-style) |
| Dimensions (H x W x D), Approx. | 56.6 x 12.1 x 77.5 mm (2.23 x 0.48 x 3.05 in.) |
| Weight, Approx. | 31.8 g (1.12 oz) |
| Operating Temperature | -20 degC to +55 degC (-4 degF to +131 degF) |
| Nonoperating Temperature | -40 degC to +85 degC (-40 degF to +185 degF) |
| Relative Humidity | 5...95% noncondensing |
| Connector Pin | Function |
|---|---|
| 0 | Input 0 |
| 1 | Input 1 |
| 2 | Input 2 |
| 3 | Input 3 |
| 4 | Common |
| 5 | Common |
| 6 | User Supply (12/24V DC) |
| 7 | User Supply (12/24V DC) |
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The Allen-Bradley 1734-IB4 is a 4-point sinking digital input module designed for the POINT I/O system. The 1734-IB4 interfaces field-side sensor devices—such as 2-wire or 3-wire proximity switches—with a central controller over I/O networks like DeviceNet, PROFIBUS, ControlNet, or EtherNet/IP via compatible adapters. Receiving 24V DC discrete signals, it produces 1 byte of input data for processor memory mapping.
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Country of Origin | Singapore |
| Inputs per Module | 4 (1 group of 4), sinking |
| On-State Voltage, Nom | 24V DC |
| On-State Voltage Range | 10...28.8V DC |
| On-State Current, Nom | 4 mA @ 24V DC |
| On-State Current, Max | 5 mA |
| Off-State Voltage, Max | 5V DC |
| Off-State Current, Min | 1.5 mA |
| Input Impedance, Nom | 3.6 kOHM |
| Input Impedance, Max | 4.7 kOHM |
| Input Filter Time (Off-to-On) | 0.5 ms hardware plus 0...63 ms (user-selectable) |
| Input Filter Time (On-to-Off) | 0.5 ms hardware plus 0...63 ms (user-selectable) |
| Field Power Supply Voltage, Nom | 24V DC |
| Field Power Voltage Range | 10...28.8V DC |
| POINTBus Current, Max | 75 mA @ 5V DC |
| Power Dissipation @ 28.8V DC, Max | 1.0 W |
| Thermal Dissipation @ 28.8V DC, Max | 3.4 BTU/hr |
| Isolation Voltage | 50V (continuous), Reinforced Insulation Type (Tested @ 2500V DC for 60 s, field-side to system) |
| Keyswitch Position | 1 |
| Terminal Base Screw Torque | 0.8 N-m (7 lb-in) |
| Enclosure Type Rating | None (open-style) |
| Dimensions (H x W x D), Approx. | 56.6 x 12.1 x 77.5 mm (2.23 x 0.48 x 3.05 in.) |
| Weight, Approx. | 31.8 g (1.12 oz) |
| Operating Temperature | -20 degC to +55 degC (-4 degF to +131 degF) |
| Nonoperating Temperature | -40 degC to +85 degC (-40 degF to +185 degF) |
| Relative Humidity | 5...95% noncondensing |
| Connector Pin | Function |
|---|---|
| 0 | Input 0 |
| 1 | Input 1 |
| 2 | Input 2 |
| 3 | Input 3 |
| 4 | Common |
| 5 | Common |
| 6 | User Supply (12/24V DC) |
| 7 | User Supply (12/24V DC) |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Singapore
|