8C-TDOLA1 Digital Output IOTA | Honeywell

The Honeywell 8C-TDOLA1, also cataloged as the 8C-TDOLA1 Digital Output Module, operates as a dedicated hardware component for 32-channel sourcing discrete signal drive execution within Honeywell Experion LX platforms.

Hardware Specifications

Channel-to-Channel Isolation & Output Drive Dynamics

The 8C-TDOLA1 incorporates a 1000 VAC isolation barrier between system backplane logic and field-side terminal circuits. Engineered to interface with discrete field actuators and 4-20 mA HART loop protocol environments, the module delivers 32 independent source-type digital outputs at up to 100 mA per channel. Individual short-circuit protection combined with a 4-fuse grouping architecture (one fuse per 8 channels) limits field-side fault propagation, shielding central controller buses from transient overload states.

Frequently Asked Questions

Q: What protection is provided if a field wiring short circuit occurs on an output channel?

A: Each output channel features built-in electronic short-circuit protection, augmented by four internal fuses that each protect an 8-channel branch circuit.

Q: What isolation rating exists between the system backplane and field-side wiring on the 8C-TDOLA1?

A: The module provides 1000 VAC galvanic isolation between the internal system logic and field output circuits when using an external field power supply.

Field Installation Guidelines

1. Disconnect all 24 VDC external power sources before mounting or removing the module from the IOTA terminal assembly base.
2. Route discrete output field cables in dedicated raceways physically separated from high-voltage AC conductors.
3. Verify that channel load current draw does not exceed 100 mA per point to prevent blowing the branch circuit fuse blocks.
4. Secure signal cable shields and establish a single-point earth ground connection at the cabinet ground bar to prevent ground loops.