Allen-Bradley 1746-NIO4I SLC 500 Analog Combination Module
$123.00
$320.00
Description
Allen-Bradley 1746-NIO4I SLC 500 Analog Combination Module
Configured for mixed analog signal acquisition and analog output execution in SLC 500 I/O architectures, the Allen-Bradley 1746-NIO4I (1746-NIO4I Analog Combination Module) provides direct physical/electrical interface between field current/voltage signals and PLC backplane processing channels.
Suffix Breakdown & Model Matrix
The 1746-NIO4I designation does not contain structured functional suffix segmentation. The model is identified as a single cataloged SLC 500 analog combination module without optional ordering suffix branches.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1746-NIO4I |
| Brand | Allen-Bradley |
| Weight | 0.45 kg |
| Dimensions | Single-slot SLC 500 rack module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 55 mA @ 5 VDC / 90 mA @ 24 VDC backplane draw |
| Input Channels | 2 analog inputs |
| Output Channels | 2 analog current outputs |
| Input Signal Range | -20 mA to +20 mA, -10 VDC to +10 VDC |
| Output Range | 0-20 mA, -10 VDC to +10 VDC |
| Resolution | 16 bit input / 14 bit output |
| Update Time | 512 microseconds |
| Step Response | 60 ms in / 2.5 ms out |
| Isolation Voltage | 500 VAC tested |
| Bandwidth | 10 Hz |
| Mounting Style | Rack mount |
| Backplane Interface | SLC 500 backplane bus |
Backplane Signal Processing Characteristics
The module interfaces with the SLC 500 backplane using cyclic I/O scanning and end-of-scan update execution. Input conversion is performed via sigma-delta sampling with programmable filtering applied prior to backplane transfer. Backplane loading is defined by fixed current draw characteristics and deterministic scan timing, with no field-side hot-swap support.
Frequently Asked Questions (FAQ)
Q: Can the 1746-NIO4I be hot-swapped under energized rack conditions?
A: The module does not support field-side hot-swap operation. Removal or insertion requires rack power isolation to avoid backplane disturbance.
Q: How is backplane current distributed during module operation?
A: Current consumption is split between 5 VDC logic rail (55 mA) and 24 VDC backplane rail (90 mA), fixed during scan operation.
Q: Does firmware affect I/O update timing or conversion cycle?
A: Conversion timing (512 microseconds update time) is hardware-defined and not modified by firmware revision level.
Field Installation Guidelines
-
Insert module into an SLC 500 compatible rack slot with backplane alignment confirmed.
-
Ensure rack power is disabled before installation or removal to prevent backplane signal disturbance.
-
Use shielded twisted pair wiring for analog inputs and route away from high-voltage conductors.
-
Terminate cable shields at a single-point ground reference at the chassis end only.
-
Maintain separation between input and output wiring paths to reduce coupling on differential channels.
-
Verify terminal block seating prior to energizing system backplane.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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