Allen-Bradley 8500-1746I SLC 500 Interface Adapter Module
The Allen-Bradley 8500-1746I, also cataloged as the 1746I Adapter Module Interface, operates as a dedicated hardware component for backplane expansion routing within SLC 500 I/O Ring networks. The module interfaces 1746 rack chassis communication channels to allow continuous signal distribution and remote rack expansion across host controllers. Internal logic converts serial ring traffic to match internal backplane bus timing, consuming 0.175 A at 5 VDC logic supply while maintaining signal integrity across industrial I/O structures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 8500-1746I (Part Number: 1746I) |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.20 kg (0.44 lbs) |
| Dimensions | Standard SLC 500 1746 single-slot chassis module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 5 VDC at 0.175 A (backplane bus power) |
| Module Type | Adapter Module Interface |
| Compatible System | SLC 500 / 1746 I/O chassis |
| Communication Network | I/O Ring interface |
| Mounting Type | Rack Mount (1746 chassis slot) |
Deterministic Network Routing & I/O Density Scaling
The 8500-1746I interface adapter manages serial data frame transmission across 1746 I/O Ring topologies, enabling high-density I/O expansion without exceeding backplane address limits. Onboard signal conditioning logic buffers input/output image tables and maintains deterministic data transfer rates between local and remote expansion chassis. Internal filtering circuits suppress electromagnetic interference (EMI) and line transients generated across long cable runs, preserving firmware flash compatibility and scan synchronization across connected rack chassis.
Frequently Asked Questions
Q: How is logic power supplied to the 8500-1746I interface module?
A: Operating power is drawn directly from the 1746 I/O chassis backplane, requiring 0.175 A from the 5 VDC power rail.
Q: What function does the I/O Ring interface serve on this module?
A: The I/O Ring interface provides physical data link routing between remote expansion racks and the primary processor rack in an SLC 500 architecture.
Q: What installation precautions should be taken regarding ground potentials across expansion racks?
A: Each interconnected 1746 chassis must be bonded to a common technical earth bar to eliminate ground loop voltage differentials across the communication ring cables.
Field Installation Guidelines
- De-energize the 1746 chassis power supply before inserting or removing the 8500-1746I module.
- Align the module circuit board with the card guides of the designated 1746 I/O chassis slot and push until fully seated in the backplane connector.
- Secure the module top and bottom retaining clips to ensure mechanical stability and frame grounding contact.
- Route I/O Ring communication cables away from high-voltage AC conductors or variable frequency drive outputs by at least 20 cm.
- Apply power to the 1746 chassis supply and verify status LED indication prior to initiating host controller communication scans.
Allen-Bradley 8500-1746I SLC 500 Interface Adapter Module
Allen-Bradley 8500-1746I SLC 500 Interface Adapter Module
The Allen-Bradley 8500-1746I, also cataloged as the 1746I Adapter Module Interface, operates as a dedicated hardware component for backplane expansion routing within SLC 500 I/O Ring networks. The module interfaces 1746 rack chassis communication channels to allow continuous signal distribution and remote rack expansion across host controllers. Internal logic converts serial ring traffic to match internal backplane bus timing, consuming 0.175 A at 5 VDC logic supply while maintaining signal integrity across industrial I/O structures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 8500-1746I (Part Number: 1746I) |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.20 kg (0.44 lbs) |
| Dimensions | Standard SLC 500 1746 single-slot chassis module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 5 VDC at 0.175 A (backplane bus power) |
| Module Type | Adapter Module Interface |
| Compatible System | SLC 500 / 1746 I/O chassis |
| Communication Network | I/O Ring interface |
| Mounting Type | Rack Mount (1746 chassis slot) |
Deterministic Network Routing & I/O Density Scaling
The 8500-1746I interface adapter manages serial data frame transmission across 1746 I/O Ring topologies, enabling high-density I/O expansion without exceeding backplane address limits. Onboard signal conditioning logic buffers input/output image tables and maintains deterministic data transfer rates between local and remote expansion chassis. Internal filtering circuits suppress electromagnetic interference (EMI) and line transients generated across long cable runs, preserving firmware flash compatibility and scan synchronization across connected rack chassis.
Frequently Asked Questions
Q: How is logic power supplied to the 8500-1746I interface module?
A: Operating power is drawn directly from the 1746 I/O chassis backplane, requiring 0.175 A from the 5 VDC power rail.
Q: What function does the I/O Ring interface serve on this module?
A: The I/O Ring interface provides physical data link routing between remote expansion racks and the primary processor rack in an SLC 500 architecture.
Q: What installation precautions should be taken regarding ground potentials across expansion racks?
A: Each interconnected 1746 chassis must be bonded to a common technical earth bar to eliminate ground loop voltage differentials across the communication ring cables.
Field Installation Guidelines
- De-energize the 1746 chassis power supply before inserting or removing the 8500-1746I module.
- Align the module circuit board with the card guides of the designated 1746 I/O chassis slot and push until fully seated in the backplane connector.
- Secure the module top and bottom retaining clips to ensure mechanical stability and frame grounding contact.
- Route I/O Ring communication cables away from high-voltage AC conductors or variable frequency drive outputs by at least 20 cm.
- Apply power to the 1746 chassis supply and verify status LED indication prior to initiating host controller communication scans.
