Description
Description
The Honeywell 10101/2/3 is a 16-channel fail-safe digital input module engineered for critical safety instrumented systems. Designed for 48 VDC signal acquisition, this module ensures high reliability in process automation environments such as oil, gas, and power generation. The unit features a fail-to-safe architecture that forces inputs into a de-energized state during an internal fault, maintaining a predictable safety posture for normally energized loops.
Features
- 16 independent digital input channels for high-density signal monitoring.
- Fail-to-safe design ensures system integrity upon internal diagnostic failure.
- Integrated self-test routines verify both logic HIGH and logic LOW state detection capabilities.
- Active crosstalk monitoring between channels to prevent signal interference.
- Input circuitry optimized for industrial noise immunity with a 10 ms signal delay to filter transient noise.
Technical Specifications
| Model |
10101/2/3 |
| Number of Channels |
16 |
| Rated Input Voltage |
48 VDC |
| Max Input Voltage |
70 VDC |
| Input Current |
4 mA at 48 VDC |
| Logic HIGH |
> 30 VDC |
| Logic LOW |
< 16 VDC (< 1.1 mA) |
| Input Delay |
10 ms (typical) |
| Operating Temp |
0 to 60 deg C |
| Power (5 VDC) |
8 mA |
| Power (24 VDC) |
80 mA |
| Power (48 VDC) |
65 mA |
Installation Guidelines
- Ensure the system is powered down before inserting or removing the module from the rack to prevent electrical damage.
- Maintain a common 0 VDC reference between the internal 24 VDC logic supply and the external 48 VDC input supply for operational stability.
- Verify connector coding (A5, C13) on both the module and the rack backplane prior to installation.
- Handle modules in accordance with standard ESD protection procedures to avoid damage to sensitive internal circuitry.
- Ensure proper ventilation within the cabinet, maintaining an operating environment between 0 and 60 deg C.
FAQ
What is the primary function of the 10101/2/3 module?
It is a fail-safe digital input module used to monitor 48 VDC signals in safety-critical applications, providing continuous diagnostic coverage and state verification.
What happens if the module fails internally?
The module is designed to fail-to-safe, meaning all inputs are forced into a de-energized state to ensure the safety system registers a trip condition.
Is this module compatible with existing 48 VDC systems?
Yes, it is designed for 48 VDC nominal input levels and requires a common 0 VDC reference for proper integration.
