1791‑16AC
Allen‑Bradley Block I/O Module
16 AC inputs · 16 AC outputs · Remote I/O adapter
Product description
1791‑16AC is a complete block I/O from Allen‑Bradley. It integrates power supply, RIO adapter, signal conditioning, and I/O terminals. This module supports 16 discrete 120VAC inputs and 16 discrete 120VAC outputs (2 groups of 8). Designed for remote I/O architectures, it connects via daisy‑chain topology to a main controller. Compatible with proximity switches, limit switches, pushbuttons, pilot lamps, solenoid actuators, and more. Mount vertically or horizontally.
- 16 inputs · 120VAC
- 16 outputs · 20‑132VAC
- RIO adapter built‑in
- 2 groups of 8 outputs
- Vertical / Horizontal mount
- 500‑1250VAC isolation
Technical specifications
Manufacturer Allen‑Bradley (Rockwell)
Model / Series 1791‑16AC · 1791 Block I/O
Part number 1791‑16AC · UPC 612598124749
Inputs 16 x 120VAC (On‑state 79‑132VAC, 47‑63Hz)
Input current 11 mA nominal / 12.3 mA max @132V
Input delay Off→On 1.0 ms; On→Off 26 ms
Outputs 16 x 120VAC (20‑132VAC) · 2 groups of 8
Output delay Off→On 1.0 ms; On→Off 8.3 ms @60Hz / 10 ms @50Hz
External power 85‑132VAC, 47‑63Hz, 150 mA @132V
Power dissipation 31.3 W max · 106.73 BTU/hr
Isolation voltage 500VAC (PS‑RIO); 1250VAC (group‑group / logic)
Mounting Vertical or horizontal (see derating)
| Input off‑state voltage | 35 V max |
| Input off‑state current | 2.3 mA min |
| Output current (vertical) | 300 mA @60°C · 600 mA @30°C |
| Output current (horizontal) | 150 mA @60°C · 300 mA @30°C |
| Weight | 2.00 lbs (0.91 kg) |
| Thermal dissipation | 106.73 BTU/hr max |
Mounting orientation
Vertical or horizontal. Vertical provides higher output current (better airflow).
Vertical or horizontal. Vertical provides higher output current (better airflow).
Diagnostic capability
Built‑in LED indicators for input/output status, power, and communication.
Built‑in LED indicators for input/output status, power, and communication.
Compatibility
Remote I/O scanner via daisy‑chain. Works with PLC‑5, SLC, and Logix controllers.
Remote I/O scanner via daisy‑chain. Works with PLC‑5, SLC, and Logix controllers.
Environmental tolerance
Operates 0‑60°C. Humidity 5‑95% non‑condensing. Vibration 2g @ 10‑500Hz.
Operates 0‑60°C. Humidity 5‑95% non‑condensing. Vibration 2g @ 10‑500Hz.
Certifications & delivery
- CE, UL, CSA
- RoHS compliant
- Package: module, terminal block, manual
- 12‑month warranty
- Shipping: FedEx, UPS, DHL
Typical applications
- Material handling conveyors · packaging machinery
- Automated assembly lines · pick‑and‑place systems
- Remote I/O racks in large distributed control systems
- Replacement for obsolete 1791 series blocks
FAQ – quick answers
Can I mix AC/DC? No, this block is AC only (120VAC I/O).
RIO baud rate? 57.6k, 115.2k, 230.4k auto‑detect.
Mounting hardware? Included; use M4 screws.
Surplus / refurbished? Yes, tested and verified.
Warranty period? 12 months from invoice.
Software support? RSLogix 500 / Studio 5000.
Why buy from Oiltech Controls
- ▶ 15+ years in industrial automation spares
- ▶ Global shipment with FedEx / UPS / DHL
- ▶ Tested surplus & refurbished options
- ▶ 12‑month warranty on every module
- ▶ Technical verification before shipment
- ▶ Support for obsolete & legacy systems
Inquiries:
info@oiltechcontrols.com ·
+86 158 8020 0923 (WhatsApp)
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