Honeywell FTA-T-17 Digital Output FTA

Overview

The Honeywell FTA-T-17 is a fail-safe digital output Field Termination Assembly (FTA) for AK5/6 safety applications. It offers four independent relay output channels, each using three relays for redundancy. Each channel includes a fused normally open (NO) contact and an LED status indicator. These features ensure secure, fail-safe control of field devices in critical environments.

Technical Specifications

Electrical Characteristics

• Input voltage: nominal 24 VDC, maximum 36 VDC

• Relay pickup voltage: typically 19.2 VDC

• Input current: ~35 mA @ 24 VDC

• Max output voltage: 250 VAC / 250 VDC

• Max output current: 5 A

• Relay contact rating: 8 A

• Max switched load: 1250 VA / 150 W

• Switching frequency: max 20 Hz

Output Configuration

• Channels: 4 relay output channels

• Relay configuration: 3 relays per channel

• Output type: potential-free NO contact with fuse

• Contact material: gold flash over silver alloy

Life Expectancy

• Electrical life: 100,000 operations

• Mechanical life: 10,000,000 operations

Protection and Isolation

• Fuses: 5 AT slow-blow (5 × 20 mm)

• Isolation coil-to-contact: 3750 VAC

• Isolation contact-to-contact: 1200 VAC

Mechanical and Wiring

• Mounting: DIN EN rail (TS32 / TS35 × 7.5)

• Dimensions: 160 × 70 × 60 mm

• Weight: 0.25 kg

• Wire termination: screw terminals, max 2.5 mm² (AWG 14)

• Strip length: 7 mm

• Tightening torque: 0.5 Nm

Environmental

• Operating temperature range: –5°C to +60°C