Features:
- Sixteen fail-to-safe 48 V DC inputs
- Defined HIGH and LOW thresholds
- Protected 48 V diagnostic test output
FC-SDI-1648 brings sixteen 48 V DC field states into the safety application.
Threshold margin must include supply tolerance, contact resistance, conductor drop and leakage.
The input delay and application time belong in the final safety-response calculation.
The Honeywell FC-SDI-1648 16-Channel 48 V DC Safe Digital Input Module is available for quotation and technical support from Apter Power.
Verified resources for FC-SDI-1648:
Input Data:
- Safe input channels: 16
- Nominal field voltage: 48 V DC
- Maximum signal voltage: 70 V DC
Use the documented FC-SDI-1648 limits when calculating the complete field circuit.
Diagnostics:
- Logic-state and crosstalk self-tests
- Protected 48 V test output
- Typical 10 ms input delay
Resolve all FC-SDI-1648 channel, wiring and system diagnostics before release to operation.
Compatibility:
- Maximum 70 V DC signal
- Maximum 100 nF load capacitance
- Key coding A13/C29
Match FC-SDI-1648 to the approved Safety Manager module, termination and field-device arrangement.
Installation Check:
- Verify 48 V polarity and range
- Prove HIGH and LOW thresholds
- Confirm application mapping
Complete and record the end-to-end functional test after installing FC-SDI-1648.