ICS Triplex T3480 Guarded Analog Output Module

Configured for executing analog signal generation in Regent T3xxx safety system architectures, the ICS Triplex T3480 (T3480 Guarded Analog Output Module) provides direct physical/electrical execution across six isolated current channels.

Hardware Specifications

Triple Modular Redundancy and SIL3 Execution

The T3480 incorporates internal dual-redundant logic paths per output channel to enforce a fail-safe state execution under single-fault conditions. Interfacing directly with the triplicated Regent I/O Safetybus, the hardware voting architecture prevents unintended 4-20 mA current deviations. Internal output drivers continuously validate loop integrity against commanded state vectors. If an internal component fault occurs, the module forces the affected channel into a deterministic safe state while maintaining galvanic isolation up to 2500 V between field wiring and internal logic circuitry, preserving overall system SIL3 compliance.

Frequently Asked Questions

Q: Does the T3480 module support live hot-swapping during active operation?

A: Yes, the T3480 is fully hot-replaceable under live backplane power without interrupting adjacent modules or disrupting loop signals on healthy channels.

Q: What is the maximum load resistance supported by the 4-20 mA outputs?

A: Each channel drives external field loops up to a maximum load resistance of 400 ohm at rated supply voltage.

Field Installation Guidelines

1. Ensure the mounting chassis frame is bonded to system protective earth via a heavy-gauge copper braid before inserting the module into the backplane.
2. Route all field-side 4-20 mA current loop wiring through dedicated shielded twisted-pair cables, keeping power conductors physically segregated to limit electromagnetic interference.
3. Terminate signal cable shields at a single point on the chassis ground rail to eliminate ground loops while providing effective RF suppression.
4. Verify external loop supply voltage stays within the specified 24 VDC +/-10% window prior to energizing field loops connected to the module output terminals.
5. Fully seat the module into the designated Regent I/O slot, locking all retaining hardware to ensure stable continuous contact with the Safetybus backplane.