Allen-Bradley 1747-SN SLC500 Remote I/O Scanner Module
Introduction:
This Allen-Bradley 1747-SN is a SLC 500 Remote I/O scanner module. Features one RIO port, Belden 9463 cable, up to 3048 m distance.
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Product Overview
The Allen-Bradley 1747-SN is a Remote I/O (RIO) scanner module for SLC 500 systems. This module implements high-speed data transfer between SLC 500 processors, HMIs, and other automation devices. The 1747-SN communicates with compatible RIO adapter modules to request I/O status updates, messages, and diagnostics over the RIO network. One RIO communication port uses a three-pin terminal. Recommended communication cable is Belden 9463 for reliable operation. Maximum cable length reaches 3048 meters (10,000 feet). Compatible processors include SLC 5/02, 5/03, 5/04, and 5/05 models. The Allen-Bradley 1747-SN supports downloading, uploading, commissioning, and remote I/O passthru.
Technical Specifications
General Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Part Number | 1747-SN |
| Series | SLC 500 |
| Module Type | Remote I/O (RIO) Scanner Module |
| UPC | 10662073876929 |
| Weight | 0.45 kg (1 pound) |
| Chassis Module Slots | 30 |
| Backup Memory | Flash |
Communication Specifications
| Parameter | Value |
|---|---|
| Number of Ports | One (1) |
| Communication Type | Remote I/O (RIO) |
| Communication Cable | Belden 9463 |
| Maximum RIO Cable Length | 3048 meters (10,000 ft) |
| Maximum Devices (normal mode) | 16 devices |
| Maximum Devices (complementary mode) | 32 devices |
| Terminating Resistor | 82 Ohm, 1/2 Watt |
| Topology | Daisy-chain with both ends terminated |
Baud Rate & Distance Specifications
| Baud Rate | Maximum Cable Length |
|---|---|
| 57.6 Kbaud (extended capability) | 3048 meters (10,000 ft) |
| 57.6 Kbaud (non-extended) | 3048 meters (10,000 ft) |
| 230.4 Kbaud (extended capability) | 762 meters (2,500 ft) |
| 230.4 Kbaud (non-extended) | 762 meters (2,500 ft) |
Power & Environmental Specifications
| Parameter | Value |
|---|---|
| Backplane Current (5 Volts) | 600 milliamps |
| Backplane Current (24 Volts) | 90 milliamps |
| Operating Temperature | 0 to 60°C (32 to 140°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | 5 to 95% without condensation |
Compatible Processors
| Processor Model | Compatibility |
|---|---|
| SLC 5/02 | Yes |
| SLC 5/03 | Yes |
| SLC 5/04 | Yes |
| SLC 5/05 | Yes |
Agency Certifications
| Certification | Status |
|---|---|
| UL / C-UL Listed Class I, Division 2, Groups A, B, C, D | Yes |
| CE marked for all applicable directives | Yes |
| C-Tick marked for all applicable acts | Yes |
One RIO Communication Port
The 1747-SN features one Remote I/O communication port. This port uses a three-pin terminal block for field wiring. The recommended communication cable is Belden 9463 for optimal signal integrity. Devices connect in a daisy-chain topology. Both ends of the network require termination using an 82 Ohm resistor. For reliable RIO networks, the Allen-Bradley 1747-SN provides a single-point scanner interface.
Baud Rate & Distance Capabilities
Four selectable baud rates are available using two DIP switches (Switch 1 and Switch 2). At 57.6 Kbaud, maximum cable length reaches 3048 meters (10,000 feet). This applies to both extended and non-extended capability modes. At 230.4 Kbaud, maximum cable length reduces to 762 meters (2,500 feet). For long-distance installations, use the lower baud rate. For high-speed applications, use the higher baud rate with shorter cable runs. The Allen-Bradley 1747-SN balances speed and distance based on your requirements.
Device Capacity
In normal mode, the 1747-SN supports up to 16 devices on the RIO network. In complementary mode, support extends to 32 devices. This capacity includes RIO adapters, PanelView terminals, message displays, and other automation devices. For larger systems, complementary mode doubles the device count. The Allen-Bradley 1747-SN scales to meet your I/O and HMI connectivity needs.
Compatible Processors
The 1747-SN works with multiple SLC 500 processor models. SLC 5/02 processors are fully compatible. Similarly, SLC 5/03, 5/04, and 5/05 processors all support this scanner module. For mixed processor environments, one scanner type serves all compatible CPUs. The Allen-Bradley 1747-SN provides consistent RIO scanning across the SLC 500 family.
Backplane Current Draw
Backplane current draw at 5 Volts reaches 600 milliamps. At 24 Volts, current draw measures 90 milliamps. Total power consumption must be considered when populating the chassis. For power budgeting, the 1747-SN has moderate requirements relative to its scanning capacity.
Supported Devices
The 1747-SN communicates with RIO protocol enabled devices. PanelView graphic operator terminals connect via RIO. Message displays and SLC 500 controllers also communicate through this scanner. Third-party devices such as gateways and protocol converters are supported as well. For diverse automation networks, the Allen-Bradley 1747-SN provides broad device compatibility.
Remote I/O Passthru
The 1747-SN supports remote I/O passthru functionality. This feature allows programming devices to communicate through the RIO network. For maintenance and commissioning, passthru simplifies access to remote devices. The Allen-Bradley 1747-SN enables efficient system-wide programming access.
Termination Requirements
Both ends of the RIO network must be terminated using an 82 Ohm, 1/2 Watt resistor. Proper termination prevents signal reflection and communication errors. Use the specified resistor value for reliable operation. For network reliability, the 1747-SN requires correct termination practices.
Agency Certifications
The 1747-SN carries UL and C-UL Class I, Division 2, Groups A, B, C, D hazardous location certifications. CE marking applies for all European Union directives. C-Tick marking applies for all applicable Australian acts. For global installations, the Allen-Bradley 1747-SN meets multiple regulatory requirements.
Installation Guidelines
Follow these steps for proper installation of the 1747-SN.
Power down the SLC 500 chassis completely before installation.
Select an available slot in the 1746 chassis for the scanner module.
Align the 1747-SN with the card guides inside the selected slot.
Slide the module firmly into place until backplane connectors engage.
Secure the module using the retaining screws at top and bottom.
Set baud rate DIP switches (Switch 1 and 2) for desired communication speed.
Connect Belden 9463 cable to the three-pin RIO port.
Install 82 Ohm terminating resistors at both ends of the network.
Connect RIO devices in daisy-chain topology.
Power up the system and verify scanner communication with adapters.
Note: The 1747-SN requires Belden 9463 cable for RIO communication. Use 82 Ohm, 1/2 Watt terminating resistors at both network ends. Maximum cable length is 3048 meters at 57.6 Kbaud and 762 meters at 230.4 Kbaud. For hazardous location installations, observe all applicable codes.
Packaging List
One Allen-Bradley 1747-SN Remote I/O Scanner Module
One product installation manual
One anti-static protective bag
Common FAQs
1. What cable is required for the 1747-SN?
Belden 9463 cable is the recommended communication cable for this scanner. The RIO port uses a three-pin terminal for field wiring connections. Devices connect in daisy-chain topology with both ends terminated. For reliable RIO networks, the Allen-Bradley 1747-SN requires Belden 9463 cable.
2. What is the maximum cable length for the 1747-SN?
At 57.6 Kbaud, maximum cable length reaches 3048 meters (10,000 feet). At 230.4 Kbaud, maximum cable length reduces to 762 meters (2,500 feet). Use 82 Ohm, 1/2 Watt terminating resistors at both ends. For long-distance installations, the Allen-Bradley 1747-SN supports up to 3048 meters at lower baud rates.
3. How many devices can connect to the 1747-SN?
In normal mode, the scanner supports up to 16 devices on the RIO network. In complementary mode, support extends to 32 devices. This includes RIO adapters, PanelView terminals, and other automation devices. For larger systems, the Allen-Bradley 1747-SN with complementary mode doubles the device capacity.
4. Which SLC processors work with the 1747-SN?
Compatible processors include SLC 5/02, 5/03, 5/04, and 5/05 models. All these processors support the RIO scanner for remote I/O communication. For mixed processor environments, one scanner type serves all compatible CPUs. The Allen-Bradley 1747-SN provides consistent RIO scanning across the SLC 500 family.
5. What are the baud rate options on the 1747-SN?
Four selectable baud rates are available using two DIP switches (Switch 1 and Switch 2). At 57.6 Kbaud, maximum distance reaches 3048 meters. At 230.4 Kbaud, maximum distance reaches 762 meters. For speed versus distance trade-offs, the Allen-Bradley 1747-SN allows user configuration of baud rate.
Why Choose This Scanner Module?
The Allen-Bradley 1747-SN delivers reliable Remote I/O scanning for SLC 500 systems. One RIO port with Belden 9463 cable supports distances up to 3048 meters. Selectable baud rates of 57.6 Kbaud and 230.4 Kbaud balance speed and distance. Support for 16 devices (normal mode) or 32 devices (complementary mode) scales with system size. Class I Division 2 hazardous location certification expands application flexibility. For SLC 500 systems requiring RIO scanning, choose the 1747-SN.