The 1746-FIO4I belongs to the Allen-Bradley SLC500 series. It works as a fast analog combination module. This unit offers two differential analog input channels. You can configure each input for 0-20 mA current or 0-10VDC voltage. Additionally, it provides two 0-20 mA current output channels. The input resolution is 12 bits, while the output resolution reaches 14 bits. Its conversion method uses successive approximation for inputs and an R-2R ladder for outputs. Therefore, this module suits applications needing quick response to changing analog signals.
The 1746-FIO4I has a conversion time of just 7.5 µs every 512 µs. Its track and hold time before conversion is 1.5 µs. Furthermore, the input bandwidth reaches 7 kHz. The step response is 100 µs for inputs and 2.5 ms for outputs. Overall input accuracy equals ±0.440% of full scale at 25°C. Meanwhile, output accuracy reaches ±0.298% of full scale at the same temperature. The backplane draws 55 mA at 5V DC and 150 mA at 24V DC. Isolation between backplane and field side is 500V DC.
For input protection, the 1746-FIO4I handles up to ±7.5V DC or 7.5V AC RMS. Its maximum input current is 30 mA. The output load range is 0 to 500 ohms. Maximum load reactance is 100 µH. This module also includes an LED indicator for status monitoring. Consequently, you can quickly verify operation.
The 1746-FIO4I fits into a single SLC500 chassis slot. It uses an open-type enclosure. Ambient humidity should stay between 5% and 95% non-condensing. The recommended wire size is 2.5 mm² (14 AWG). For best signal integrity, use shielded cable like Belden #8761. Operating temperature ranges from 0°C to 60°C (32°F to 140°F). Storage temperature is -40°C to 85°C.
First, confirm the 1746-FIO4I is compatible with your SLC500 controller. It works with fixed styles 1747-L20, L30, L40 and all modular chassis. Next, insert the module into any unused slot. Ensure the backplane connectors align properly. Then, tighten the retaining screws. For wiring, strip wires to 6-7 mm. Connect each signal to the correct terminal. Specifically, use shielded cable for input channels to reduce noise. Finally, ground the shield only at the module end.
1746-FIO4I module – 1 unit
Terminal block (removable) – 1 piece
User manual (quick start guide) – 1 copy
Label sheet for channel identification – 1 sheet
Note: No certificates or warranty documents are included.
We ship via FedEx, UPS, or DHL. Tracking number provided after dispatch.
1. Can the 1746-FIO4I accept both voltage and current on the same channel?
No, each channel is configurable for either 0-20 mA or 0-10V DC. You must select the mode per channel via configuration.
2. What is the update time of the 1746-FIO4I?
The module updates all channels every 512 microseconds. Input conversion occurs every 512 µs as well.
3. Is the 1746-FIO4I isolated from the backplane?
Yes, it provides 500V DC isolation between backplane and field side. However, the two output channels are not isolated from each other.
4. Which controllers work with the 1746-FIO4I?
It works with all SLC500 fixed and modular controllers. Examples include 1747-L20, L30, L40, and any 1746 chassis.
5. What happens if I exceed 20 mA on an input channel?
The 1746-FIO4I can handle up to 30 mA absolute maximum. However, accuracy is only guaranteed within 0-20 mA nominal range.
| Brand Name | Allen-Bradley |
| Model No. | 1746-FIO4I |
| Product Type | Analog Combination Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
