The 1791DS-IB12 belongs to the Guard I/O 1791DS series. It provides 12 single‑channel sinking safety inputs and 4 sourcing test outputs. This module also carries North American Hazardous Location approval. You can mount it easily using the built‑in DIN rail attachment hook.
Furthermore, the 1791DS-IB12 has no external enclosure. Its compact design saves panel space. The module communicates over DeviceNet, making it a strong fit for safety control systems.
Here are the key technical details for the 1791DS-IB12:
Number of inputs: 12 single‑channel safety inputs (highlighted)
Input type: Current sinking
On‑state input voltage: 11V DC minimum
Off‑state input voltage: 5V DC maximum
Input current (on‑state): 6 mA
Input current (off‑state): 1 mA maximum
Test outputs: 4 current sourcing outputs
Output residual voltage: 1.2V maximum
Output rated current: 0.7 A
Output leakage current: 0.1 mA maximum
Additionally, the 1791DS-IB12 draws 110 mA at 24V DC for communications. Its I/O power supply range is 20.4 to 26.4V DC, with a nominal 24V DC. The communication power supply accepts 11 to 25V DC.
The 1791DS-IB12 weighs 1.19 lbs (0.54 kg). It has no built‑in enclosure, so you must install it inside a suitable control cabinet. The DIN rail attachment hook simplifies mounting and removal.
Because this module carries Hazardous Location approval, you can use it in specific industrial environments. However, always follow local safety codes during installation.
First, attach the 1791DS-IB12 to a standard DIN rail using the hook. Next, connect the DeviceNet communication cable and supply 11‑25V DC. Then wire the I/O power at 24V DC nominal (20.4‑26.4V DC).
Meanwhile, verify that field devices match the sinking input configuration. For instance, connect safety switches or light curtains to the 12 input channels. Use the 4 test outputs to monitor external device status.
Finally, test the safety function before putting the system into operation. Proper testing ensures reliable safety performance.
1791DS-IB12 safety input module (1 unit)
DIN rail attachment hook (pre‑installed)
Quick reference guide
Note: No certificates or warranty documents are included. Contact your supplier for warranty terms.
Shipping method: FedEx, UPS, DHL
1. Does the 1791DS-IB12 work with standard DeviceNet networks?
Yes, it communicates over DeviceNet using 11‑25V DC communication power.
2. Can I use the 1791DS-IB12 in a hazardous location?
Yes. It holds North American Hazardous Location approval for specific industrial areas.
3. How many test outputs does the 1791DS-IB12 provide?
It gives you 4 current sourcing test outputs for monitoring external safety devices.
4. What is the difference between the 1791DS-IB12 and a standard input module?
This module includes safety‑rated inputs and test outputs. It also carries safety approvals for critical applications.
5. Does the 1791DS-IB12 require an external enclosure?
Yes, because it has no built‑in enclosure. You must mount it inside a control cabinet.
| Brand Name | Allen-Bradley |
| Model No. | 1791DS-IB12 |
| Product Type | Safety Input Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
