Designing Power and Communication Redundancy
Design control-system redundancy by mapping shared dependencies, separating power and network paths, defining failover behavior, exposing degraded operation, and proof-testing every tolerated fault.
Manufacturer: Honeywell
Product No.: SDI-1624
Country of origin:United States
Product Type: Safety PLC Input Modules
Payment: T/T, Western Union
Weight: 3000g
Shipping port: Xiamen
Warranty: 12 months
Integrating seamlessly into Safety Manager and Fail Safe Control (FSC) architectures, the Honeywell SDI-1624 serves as a high-integrity safe digital input interface designed for safety-critical industrial processes. This solid-state module processes up to 16 isolated safe input channels, converting field signals into dual-channel diagnostic data for the safety controller. Engineered with a robust 3U Eurocard form factor, the SDI-1624 provides continuous self-testing, short-circuit protection, and precise signal filtering to prevent spurious trips in demanding industrial settings.
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model Number | SDI-1624 |
| Module Type | Safe Digital Input Module (Solid State) |
| Number of Channels | 16 |
| Physical Dimensions | 4 HP (TE) Width, 3U (HE) Height |
| Logic Power Consumption | 5 Vdc, 8 mA |
| Internal 24 Vdc Power | 24 Vdc, 110 mA |
| External 24 Vdc Power | 24 Vdc, 110 mA (input currents) |
| Maximum Input Voltage | 36 Vdc |
| Nominal Input Current | 7 mA at 24 Vdc |
| Input Threshold - HIGH | > 15 Vdc |
| Input Threshold - LOW | < 9 Vdc (Current < 2 mA) |
| Input Signal Delay | Typically 10 ms |
| Maximum Loop Current | 450 mA |
| Max. Load Capacitance | 32 uF |
| Voltage Drop | < 1.5 V at 450 mA |
| Ripple Limit (5 Vdc Rail) | < 0.5 Vp-p (0 to 360 Hz) |
| Certifications / Approvals | CE, TUV, UL, CSA, FM |
| Shipping Weight | 3.0 kg (6.6 lbs) |
The SDI-1624 is a standardized safe input card for Honeywell FSC and Safety Manager backplanes. When migrating from older system revisions, confirm that the installed Field Termination Assembly (FTA) and cable routing are fully pin-compatible. This module directly replaces legacy safety digital inputs within the same system family, but safety parameter re-validation is recommended post-replacement.
Keep the total field cabling capacitance below 32 uF. Exceeding this limit will distort the pulse-testing diagnostics generated by the safety processor, resulting in false channel faults or card mismatches. Ensure the 24 Vdc power supply feeding the field loops does not exhibit noise levels exceeding 0.5 Vp-p to prevent diagnostics from flagging signal instability.
Always route the 24 Vdc external supply and logic signals in separate shielded conduits to minimize electromagnetic interference (EMI). Ensure that the reference ground for the external 24 Vdc supply is bonded to the Safety Manager system common ground at a single, low-impedance point to prevent ground loops that could cause diagnostic errors.
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Returns & Warranty
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| Country of origin |
United States
|