Allen-Bradley 1756-IB16S
Control Logix Safety IO Module, 16 Sinking Inputs
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Allen-Bradley 1756-IB16S ControlLogix safety input module: 16 sinking inputs, 10...32V DC on-state, eight test outputs, up to SIL 3 per IEC 61508.
- Manufacturer
- Allen-Bradley
- Manufacturer part no.
- 1756-IB16S
- Product family
- ControlLogix I/O Modules (1756)
- Type
- Digital input module
- Category
- PLCs and I/O › Digital I/O modules
- Lifecycle
- Active
- OEM successor
- Not stated
- Technical datasheet
- Data sheet
Technical specifications
- Manufacturer
- Allen-Bradley
- Manufacturer part no.
- 1756-IB16S
- Type
- Digital input module
- Application
- I/O module
- Used with
- ControlLogix 1756 chassis
- On-state voltage range
- 10...32V DC
- On-state current, @ on-state min voltage
- 2.4 mA @ 10V
- On-state current, @ on-state nom voltage
- 2.5 mA @ 24V
- On-state current, @ on-state max voltage
- 2.8 mA @ 32V
- Off-state voltage, max
- 5V DC
- Off-state current, max
- 1.5 mA
- Input delay time (screw to backplane), max
- 6 ms @ RPI of 2 ms
- Safety Integrity Level
- Up to and including Cat. 4 / PLe acc. to EN ISO 13849-1, SIL CL 3 acc. to IEC 62061, SIL 3 acc. to IEC 61508.
- Test output current per point
- 0.2 A
- Number of test outputs
- 8
- Test output pulse width, max
- 600 µs
- Test output pulse period, typical
- 100 ms
- Test output max field capacitance
- 100 nF
- Test output short circuit protection
- Yes
- Test output leakage current, max
- 0.5 mA
- DC supply overvoltage protection, max
- 60V
- Input delay time
- 0…50 ms 0…50 ms
- Timestamp of inputs
- No
- Inputs
- 16 channels (1 group of 16), sinking
- Current draw @ 5.1V
- 280 mA
- Total backplane power
- 1.43 W
- Field Power voltage range
- 18…32V DC SELV/PELV
- Field Power current, max
- 1.8 A SELV/PELV
- Input Power, voltage range
- 10…32V
- Input Power current, max
- 2.5 mA SELV/PELV 150VA
Show all 51 specificationsShow fewer
- Test Output Power, voltage range
- 18…32V DC
- Test Output Power current, max
- 200 mA
- Power dissipation, max
- 6 W
- Thermal dissipation, max
- 20.47 BTU/hr
- Isolation voltage
- 60V (continuous), basic insulation type, channels-to-backplane, No isolation between DC power and channels, No isolation between individual ports
- Module keying
- Electronic, software configurable
- RTB keying
- User-defined mechanical
- Wire category
- 2 - on power ports
- Enclosure type
- None (open-style)
- Temperature code
- T4
- Temperature, operating
- 0 °C ≤ Ta ≤ 60 °C (32 °F ≤ Ta ≤ 140 °F)
- Temperature, nonoperating
- -40…+85 °C (-40…+185 °F)
- Relative humidity
- 5…95% noncondensing
- Vibration
- 2 g @ 10…500 Hz
- Shock, operating
- 30 g
- Emissions
- IEC 61000-6-4
- ESD immunity
- 6 kV contact discharges 8 kV air discharges
- Radiated RF immunity
- 10V/m with 1 kHz sine wave 80% AM from 80…2000 MHz 3V/m with 1 kHz sine wave 80% AM from 2000…2700 MHz 3V/m with 1 kHz sine wave 80% AM from 2000…6000 MHz
- EFT/B immunity
- ±2 kV @ 5 kHz on signal ports
- Surge transient immunity
- ±1 kV line-line (DM) and ±2 kV line-earth (CM) on signal ports
- Conducted RF immunity
- 10V rms with 1 kHz sine wave 80% AM from 150 kHz…80 MHz
Technical documents (1)
Key features
- 16 sinking input channels in one group
- Eight test outputs with short circuit protection
- Electronic, software configurable module keying
- User-defined mechanical RTB keying
- Operating temperature 0 °C to 60 °C
About the Allen-Bradley 1756-IB16S
The 1756-IB16S is a ControlLogix safety I/O module with 16 sinking input channels in one group. On-state voltage is 10...32V DC and maximum off-state voltage is 5V DC. It is rated up to Cat. 4 / PLe to EN ISO 13849-1, SIL CL 3 to IEC 62061 and SIL 3 to IEC 61508. It draws 280 mA at 5.1V and dissipates up to 6 W.
What is the 1756-IB16S used for?
It brings 16 safety input channels into a ControlLogix safety system. Eight test outputs, each rated 0.2 A per point with short circuit protection, pulse the field devices. Maximum input delay is 6 ms from screw to backplane at an RPI of 2 ms.
Lifecycle and successor
Active (Rockwell Automation lifecycle status, checked 24 October 2026).
Before you order
What to photograph or confirm so the right unit is quoted.
Read the catalog number 1756-IB16S, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.
Other parts in the Allen-Bradley ControlLogix I/O Modules family
Listed for reference. They differ from the 1756-IB16S in rating, supply, interface or function and are not interchangeable with it unless Allen-Bradley says so. Match the part number on your unit.
| Product | Type | Lifecycle | Qty Available | Price | Action |
|---|---|---|---|---|---|
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| Allen-Bradley 1756-IF6IControlLogix 6 Point Isolated Analogue Input Module | Analog input module | Discontinued | On request | On request | View |
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| Allen-Bradley 1756-OA16ControlLogix 16 Point 74-265 VAC Output Module | Digital output module | Active | On request | On request | View |
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