Honeywell FS-TDO-1624 Digital Output Field Termination Assembly
The Honeywell FS-TDO-1624, also cataloged as the FS-TDO-1624 Digital Output Field Termination Assembly, operates as a dedicated hardware component for routing 24 VDC digital output switching signals within Honeywell Safety Manager platforms.
Suffix Breakdown & Model Matrix
The suffix structure defines environmental protection variants for the 1624 digital output field termination assembly:
- FS-TDO-1624: Standard non-conformal-coated fail-safe digital output field termination assembly.
- FC-TDO-1624: Conformally coated variant engineered for enhanced isolation against corrosive atmospheric contaminants and moisture.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FS-TDO-1624 |
| Brand | Honeywell |
| Origin | United States |
| Weight | 0.5 kg |
| Dimensions | 90 x 70 x 58 mm (3.54 x 2.76 x 2.28 in) |
| Operating Temp | -20 deg C to 70 deg C |
| Power Consumption | 24 VDC nominal field voltage |
| Number of Channels | 16 digital output channels |
| Max Continuous Current | 1.5 A per channel |
| System Interface | SIC-C-12 system interconnection cable |
| Mounting Type | TS32 / TS35 x 7.5 DIN rail |
Channel-to-Channel Isolation & HART Loop Protocol
The module architecture enforces strict channel-to-channel isolation to prevent electrical feedback from propagating across adjacent safety loops. While primarily servicing discrete 24 VDC digital actuation, the hardware integrates smoothly into control cabinets operating alongside 4-20 mA HART loop protocol instrumentation. Integrated internal suppression barriers safeguard controller backplane logic against transient voltage spikes originating on long field cable runs, preserving deterministic signal transmission across the SIC-C-12 interconnection bus.
Frequently Asked Questions
Q: How do you establish connection between the FS-TDO-1624 module and the Safety Manager controller architecture?
A: The module connects via the SIC-C-12 system interconnection cable directly to the corresponding controller output card, while external field wiring terminates onto the onboard screw terminals.
Q: What are the wire gauge and tightening torque constraints for the field terminal blocks?
A: The screw terminals accept solid or stranded conductors up to 2.5 mm² (AWG 14). Conductors must be stripped to 7 mm (0.28 in) and terminal screws tightened to exactly 0.5 Nm (0.37 ft-lb).
Field Installation Guidelines
Mount the unit securely onto a standard TS32 or TS35 x 7.5 DIN rail within a grounded metallic enclosure, ensuring the mounting rail span reaches at least 91 mm. Strip field conductors to exactly 7 mm and secure them into the screw terminals using a calibrated torque screwdriver set to 0.5 Nm. Connect the SIC-C-12 interconnection cable firmly to the system interface header prior to energizing the 24 VDC field loop. Land all field cable shielding directly on the cabinet earth ground bar to guarantee optimal noise immunity and surge suppression across all 16 digital output channels.
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