FC-TSRO-08UNI

Configured for relay-based safety output switching in the Honeywell Safety Manager system, the Honeywell FC-TSRO-08UNI (TSRO-08UNI) Digital Output Field Termination Assembly provides eight relay output channels between the system interconnection cable SICC-0001/Lx and external field wiring. Each channel contains three relays, a fused normally open field contact, and a status LED. The assembly supports SIL3 applications in accordance with IEC 61508 and uses a common external power connection.

Hardware Specifications

Parameter	Specification
Model	FC-TSRO-08UNI
Base Model	TSRO-08UNI
Brand	Honeywell
Product Type	Digital Output Relay Field Termination Assembly
System	Honeywell Safety Manager
Number of Output Channels	8
Output Type	Relay-based digital output
Nominal Input Voltage	24 VDC
Maximum Input Voltage	36 VDC
Relay Pick-up Voltage	19.2 VDC
Maximum Output Current	2 A per channel, fused
Minimum Output Current	1 mA at 5 V
Maximum Output Voltage	250 VAC / 250 VDC
Field Contact	Normally open (NO), fused
Fuse Rating	2 AT, slow-acting
Relay Configuration	Three relays per channel
Status Indication	LED per channel
External Power Connection	Common power connection via screw terminals
System Interface	SICC-0001/Lx system interconnection cable
Field Wiring Interface	Screw terminals
Safety Standard	IEC 61508
Safety Application Rating	SIL3, without fault exclusions

Relay Output Architecture and SIL3 Operation

The FC-TSRO-08UNI provides eight relay-based output channels for switching external field loads. Each channel incorporates three relays and a fused normally open field contact. The common external power connection supplies the assembly through screw terminals.

The relay contacts support AC and DC switching within the specified maximum ratings, including 115 VAC and 230 VAC applications. The energized relay state is indicated by the channel status LED.

The module is specified for SIL3 applications in accordance with IEC 61508 without relying on fault exclusions. Application-level safety performance depends on the complete safety loop design, wiring, load characteristics, and system configuration.

Frequently Asked Questions (FAQ)

Q: Can the FC-TSRO-08UNI switch both AC and DC field loads?

A: Yes. The specified maximum output voltage is 250 VAC or 250 VDC. The connected load must also comply with the channel's 2 A fused current rating and the applicable relay contact limitations.

Q: What protection is provided for each relay output channel?

A: Each channel has a fused normally open field contact with a 2 AT slow-acting fuse. Each channel also has a status LED indicating the energized relay state.

Q: How does the FC-TSRO-08UNI connect to the Safety Manager system and field wiring?

A: The assembly interfaces with the SICC-0001/Lx system interconnection cable and terminates external field wiring at screw terminals. It uses one common external power connection.

Field Installation Guidelines

• Verify the FC-TSRO-08UNI model and compatibility with the installed Honeywell Safety Manager system before installation.
• Confirm that the system interconnection cable matches the specified SICC-0001/Lx interface.
• Wire field loads to the designated screw terminals in accordance with the manufacturer's terminal assignment documentation.
• Verify that the external supply is within the specified nominal 24 VDC and maximum 36 VDC input ratings.
• Check that each connected load remains within the 2 A fused current limit and the maximum 250 VAC / 250 VDC output voltage rating.
• Route relay output wiring separately from low-level analog and communication wiring where practical to reduce electrical interference.
• Apply protective earthing and cable shielding according to the system installation documentation and site electrical standards.
• Verify fuse ratings, field contact continuity, relay operation, and LED status indications during commissioning.
• Validate the complete safety function and SIL3 requirements at system level before placing the installation into service.

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