1794-IB16D
Allen‑Bradley Flex I/O Digital Input Module w/ Diagnostics
16 sinking inputs · 24V DC · built‑in diagnostics · FLEX I/O series
Key features – field diagnostics & high‑density input
- ✔ 16 sinking 24V DC inputs
- ✔ Diagnostics for open/short wiring
- ✔ 50mA sensor power output
- ✔ Filter adjustable per channel
- ✔ 33 LEDs – 16 diag + 16 status + fault
Manufacturer
Allen‑Bradley / Rockwell
Allen‑Bradley / Rockwell
Model
1794-IB16D · Flex I/O
1794-IB16D · Flex I/O
Inputs
16 sinking, 24V DC nominal
16 sinking, 24V DC nominal
On‑state range
10‑32V DC (detection)
10‑32V DC (detection)
Input impedance
3.1 kΩ nominal
3.1 kΩ nominal
Sensor power
50mA max, drop 2.2V DC
50mA max, drop 2.2V DC
Isolation
50V continuous
50V continuous
Power dissipation
8.5W @31.2V DC · 29 BTU/hr
8.5W @31.2V DC · 29 BTU/hr
Flexbus current
30mA @5V DC
30mA @5V DC
Weight
0.25 lbs (0.11 kg)
0.25 lbs (0.11 kg)
Diagnostic capability & terminal base compatibility
- Detects open input circuits, shorted wiring, reversed DC supply, and disconnected field devices.
- Mounts on 1794-TB32 or 1794-TB32S terminal base (keyswitch position 4).
- Flexbus connector must be pushed fully left to link with adjacent base.
- Adjustable input filter – user‑configurable per channel.
- 33 LED indicators: 16 red diag, 16 yellow on/off, 1 red module fault.
Oiltech Controls’s Insight – ideal pairing
- Best for: PLC‑5, ControlLogix, CompactLogix systems via 1794 FLEX I/O adapters.
- Field devices: 24V DC proximity sensors, limit switches, photoelectric sensors, pushbuttons, and relay contact inputs.
- Diagnostic advantage: reduces troubleshooting time on conveyor lines, packaging machines, and material handling.
- Upgrade path: replaces non‑diagnostic 1794‑IB16 or 1794‑IB8 modules with same footprint.
Additional technical data
- On‑state current max: 1.5mA (sinking).
- Sensor power voltage drop: 2.2V DC max.
- Thermal dissipation: 29 BTU/hr @31.2V DC.
- Dimensions: 45.7 x 94 x 53.3 mm (1.8 x 3.7 x 2.1 in).
- Operating temp: 0‑60°C; humidity 5‑95% non‑condensing.
Frequently asked questions – expert selection guide
- Q: Can I use 1794-IB16D with 1794-ASB or 1794-ACN15?
A: Yes, it works with all FLEX I/O adapters (RIO, ControlNet, DeviceNet). Ensure terminal base is set to position 4. - Q: How do I adjust the input filter time?
A: Use RSLogix 5000 / Studio 5000 – configure the filter per channel (0.5ms to 32ms) to reject noise. - Q: Does this module support 2‑wire or 3‑wire sensors?
A: Both. For 2‑wire, ensure sensor leakage current < 1.5mA off‑state to avoid false triggering. - Q: What is the diagnostic LED behavior for a shorted input?
A: Red diag LED flashes; status LED may stay on. Check field wiring for short to +24V or ground. - Q: Is this module obsolete? What is the replacement?
A: 1794-IB16D is still active but nearing phase‑out. We offer tested surplus units with 12‑month warranty.
Why choose Oiltech Controls
- ✅ 15+ years in industrial spares
- ✅ Worldwide shipping (FedEx, UPS, DHL)
- ✅ Tested surplus / refurbished options
- ✅ 12‑month warranty
- ✅ Pre‑shipment technical verification
- ✅ Legacy system support
🚚 24‑28 hrs dispatch · FedEx / UPS / DHL
🔒 12‑month warranty on all modules
🔒 12‑month warranty on all modules
Inquiries: info@oiltechcontrols.com ·
+86 158 8020 0923 (WhatsApp)
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