Allen-Bradley 1745-E102 SLC 100 Expansion Unit
The Allen-Bradley 1745-E102 is an I/O expansion unit designed to scale the channel capacity of SLC 100 programmable controller systems. Connected via an interconnecting ribbon cable, it provides control engineers with an integrated hardware solution to expand input and output points without adding another standalone processor.
Field I/O Architecture and Electrical Isolation
The unit features 10 discrete inputs requiring an 8 mA nominal input current, along with 6 discrete outputs wired via screw-type terminals that accept 14 to 24 AWG conductors. To shield sensitive control logic from field-side voltage transients, the inputs incorporate 1,500 V electrical-optical isolation. Signal conditioning includes an input filter time delay of 18 to 25 ms to mitigate contact bounce, while safety limits specify a maximum OFF-state voltage of 50 V and a maximum OFF-state leakage current of 2 mA.
Diagnostic Monitoring and Power Specifications
Real-time status monitoring is provided by front-panel indicators, consisting of 6 green LEDs for input state verification and 10 red LEDs for output status tracking. The internal power supply operates across dual selectable line voltage windows of 85 to 132 VAC and 170 to 265 VAC at standard 50/60 Hz system frequencies.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1745-E102 |
| Brand | Allen-Bradley |
| Product Type | Programmable Controller Expansion Unit |
| Operating Voltage Range | 85–132 VAC / 170–265 VAC |
| System Frequency | 50/60 Hz |
| Number of Inputs | 10 input terminals |
| Rated Input Current | 8 mA |
| Number of Outputs | 6 output terminals |
| Input Filter Time Delay | 18–25 ms |
| Isolation | 1,500 V electrical-optical isolation (inputs to control logic) |
| Max OFF State Voltage | 50 V |
| Max OFF State Leakage Current | 2 mA |
| Local Signalling | 6 green LEDs (inputs), 10 red LEDs (outputs) |
| System Interconnect | Ribbon cable |
| Termination Method | Screw-type terminals |
| Wire Size | 14–24 AWG |
| Weight | 1.81 kg (4.00 lbs) |
Frequently Asked Questions
Q: How does the 1745-E102 expansion unit communicate with the main controller? A: The 1745-E102 interfaces directly with the SLC 100 master programmable controller using a ribbon cable connection.
Q: What line voltages are supported by the 1745-E102 power circuit? A: The internal power stage supports alternating current operating ranges of 85 to 132 VAC and 170 to 265 VAC at 50/60 Hz.
Q: What wire size range is compatible with the unit's field wiring terminals? A: The integrated screw-type terminals accommodate field wiring sizes ranging from 14 to 24 AWG.
Allen-Bradley 1745-E102 SLC 100 Expansion Unit
Allen-Bradley 1745-E102 SLC 100 Expansion Unit
The Allen-Bradley 1745-E102 is an I/O expansion unit designed to scale the channel capacity of SLC 100 programmable controller systems. Connected via an interconnecting ribbon cable, it provides control engineers with an integrated hardware solution to expand input and output points without adding another standalone processor.
Field I/O Architecture and Electrical Isolation
The unit features 10 discrete inputs requiring an 8 mA nominal input current, along with 6 discrete outputs wired via screw-type terminals that accept 14 to 24 AWG conductors. To shield sensitive control logic from field-side voltage transients, the inputs incorporate 1,500 V electrical-optical isolation. Signal conditioning includes an input filter time delay of 18 to 25 ms to mitigate contact bounce, while safety limits specify a maximum OFF-state voltage of 50 V and a maximum OFF-state leakage current of 2 mA.
Diagnostic Monitoring and Power Specifications
Real-time status monitoring is provided by front-panel indicators, consisting of 6 green LEDs for input state verification and 10 red LEDs for output status tracking. The internal power supply operates across dual selectable line voltage windows of 85 to 132 VAC and 170 to 265 VAC at standard 50/60 Hz system frequencies.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1745-E102 |
| Brand | Allen-Bradley |
| Product Type | Programmable Controller Expansion Unit |
| Operating Voltage Range | 85–132 VAC / 170–265 VAC |
| System Frequency | 50/60 Hz |
| Number of Inputs | 10 input terminals |
| Rated Input Current | 8 mA |
| Number of Outputs | 6 output terminals |
| Input Filter Time Delay | 18–25 ms |
| Isolation | 1,500 V electrical-optical isolation (inputs to control logic) |
| Max OFF State Voltage | 50 V |
| Max OFF State Leakage Current | 2 mA |
| Local Signalling | 6 green LEDs (inputs), 10 red LEDs (outputs) |
| System Interconnect | Ribbon cable |
| Termination Method | Screw-type terminals |
| Wire Size | 14–24 AWG |
| Weight | 1.81 kg (4.00 lbs) |
Frequently Asked Questions
Q: How does the 1745-E102 expansion unit communicate with the main controller? A: The 1745-E102 interfaces directly with the SLC 100 master programmable controller using a ribbon cable connection.
Q: What line voltages are supported by the 1745-E102 power circuit? A: The internal power stage supports alternating current operating ranges of 85 to 132 VAC and 170 to 265 VAC at 50/60 Hz.
Q: What wire size range is compatible with the unit's field wiring terminals? A: The integrated screw-type terminals accommodate field wiring sizes ranging from 14 to 24 AWG.
