Honeywell FC-TDOL-0724P Line-Monitored Relay Contact Digital Output Assembly

The Honeywell FC-TDOL-0724P is a field termination assembly for 24 VDC line-monitored digital outputs in the Safety Manager system. It provides seven fused relay contact outputs, each rated at 2 A, for non-safety-related resistive or inductive loads up to 50 W. Dedicated monitoring circuits detect short circuits and lead breakages when outputs are energized or de-energized, in conjunction with compatible Safety Manager digital input and output modules and the required application software.

Output Configuration and Line Monitoring

The FC-TDOL-0724P provides seven individually fused relay contact outputs. Each channel supports a maximum output current of 2 A, subject to the load rating, fuse protection, and temperature-dependent derating limits. The specified field supply is 24 VDC +/- 20%.

Each channel includes a dedicated line-monitoring circuit for detecting wiring faults in both the energized and de-energized states. The short-circuit detection load threshold is specified as 200 ohm to 400 ohm. The diagnostic function requires coordinated operation with standard Safety Manager DI and DO modules configured for redundant or non-redundant I/O, together with the applicable software from the Safety Manager Function Library.

Electrical Ratings

Fuse Protection and Derating

Each output uses a 2 A fuse with the following specifications.

The fuse rating defines the specified protection component, not an unrestricted continuous load rating under all conditions. The stated current derating should be considered when evaluating operation at elevated temperatures. The product description limits field loads to 50 W, even though the relay contact specification lists a maximum switched power of 150 W; these figures describe different stated limits and should not be treated as interchangeable.

Power Consumption

The assembly uses the 24 VDC field supply and associated Safety Manager I/O modules for its output and read-back functions. The listed consumption values distinguish the field supply from current drawn through the associated I/O modules.

The listed values apply to different supply paths and circuit configurations. They should not be added together as a single power-consumption figure without confirming the applicable wiring and system configuration.

Mechanical Design and Field Termination

The assembly mounts on standard TS32 or TS35 x 7.5 DIN EN rails. Seven pairs of screw terminals provide the field wiring connections, while a keyed two-pole connector provides the common supply connection.

The field terminals and common supply connector have separate wiring requirements. Confirm conductor size, stripping length, terminal torque, and connector keying before installation. The supplied dimensions and rail length should also be checked against the available cabinet space.

Frequently Asked Questions

Q: Can the FC-TDOL-0724P be used for safety-related field loads?

A: The specified application is for non-safety-related resistive or inductive loads up to 50 W per output. Its line-monitoring capability does not, by itself, establish a safety integrity rating for the field termination assembly.

Q: Which Safety Manager I/O modules are required for line monitoring?

A: The documented configuration uses the SDI-1624 digital input module and SDO-0824 digital output module. Both are required for the stated line-monitoring arrangement, with the overall configuration and application software selected for redundant or non-redundant I/O.

Q: What load conditions must be checked before connecting a field device?

A: Verify the 24 VDC +/- 20% supply, 2 A channel fuse, 50 W field-load limit, relay contact rating, and temperature-dependent current derating. Inductive loads must also meet the specified spark-suppression diode requirement.