Honeywell TC-FOR081 8-Channel Relay Output Module

Honeywell TC-FOR081 Relay Digital Output Module

Product Introduction

The Honeywell TC-FOR081 provides eight independent relay outputs for your automation system. Each output uses a Form A (normally open) electromechanical relay. Moreover, every channel is fully isolated from the others. This design makes the TC-FOR081 ideal for switching mixed voltage loads. You can control ac and dc devices on the same module without interference.

Additionally, this module handles demanding applications. It switches resistive loads up to 240V ac at 2A. It also supports inductive loads with high inrush current up to 15A. The TC-FOR081 mounts easily on a DIN rail. Eight yellow status indicators show the logic state of each channel.

Technical Specifications

This section details the electrical and switching characteristics.

Output Configuration

• Number of outputs: 8 Form A (normally open) electromechanical relays

• Isolation: Fully isolated between any two channels

• Off-state leakage: 1mA through snubber circuit

• Keyswitch position: 9

Resistive Load Ratings

• 5-30V dc at 2.0A

• 48V dc at 0.5A

• 125V dc at 0.25A

• 125V ac at 2.0A

• 240V ac at 2.0A

Inductive Load Ratings (steady state)

• 5-30V dc at 2.0A (L/R = 7ms)

• 48V dc at 0.5A (L/R = 7ms)

• 125V dc at 0.25A (L/R = 7ms)

• 125V ac at 2.0A, 15A make (PF = 0.4)

• 240V ac at 2.0A, 15A make (PF = 0.4)

Power Ratings (steady state)

• 250W for 125V ac resistive, 250VA for inductive

• 480W for 240V ac resistive, 480VA for inductive

• 60W for 30V dc resistive, 60VA for inductive

• 24W for 48V dc resistive, 24VA for inductive

• 31W for 125V dc resistive, 31VA for inductive

Isolation Voltage (tested for 1 second)

• Between any two sets of contacts: 2550V dc

• Customer load to logic: 2550V dc

• Customer load to 24V dc supply: 2550V dc

• Customer 24V dc supply to logic: 850V dc

Timing and Switching

• OFF to ON signal delay: 8ms maximum

• ON to OFF signal delay: 26ms maximum

• Operate/release time: 10ms maximum

• Bounce time: 1.2ms mean

• Switching frequency: 1 operation per 3 seconds (0.3Hz at rated load) maximum

• Minimum contact load: 100µA at 100mV dc

• Expected electrical life: 100,000 operations minimum at rated loads

Additional Electrical Data

• Initial contact resistance: 30mΩ

• Max inrush current: 15A

• Flexbus current: 69mA at 5V dc maximum

• Power dissipation: 5.5W maximum

• Thermal dissipation: 18.8 BTU/hr maximum

Fusing Requirement
The TC-FOR081 outputs are not fused internally. For external fusing, use a fused terminal base with a 3.0A Littelfuse 239003 per channel.

Mechanical and Environmental Ratings

The Honeywell TC-FOR081 is built for industrial environments. Its compact size saves panel space.

Dimensions and Mounting

• Height: 46mm (1.8 inches)

• Width: 94mm (3.7 inches)

• Depth: 53mm (2.1 inches)

• Mounting type: DIN-rail mounted

Environmental Conditions

• Operational temperature: 0 to 55°C (32 to 131°F)

• Storage temperature: -40 to 85°C (-40 to 185°F)

• Relative humidity: 5 to 95% non-condensing

• Shock operating: 12g peak acceleration, 11ms pulse width

• Shock non-operating: 50g peak acceleration, 11ms pulse width

• Vibration: tested at 2g from 10 to 500Hz per IEC 68-2-6

Wiring Specifications

• Conductor wire size: 12 gauge (4mm²) stranded maximum

• Insulation thickness: 3/64 inch (1.2mm) maximum

• Wire temperature rating: 75°C or higher

External DC Power

• Supply voltage: 24V dc nominal

• Voltage range: 19.2 to 31.2V dc (includes 5% ac ripple)

• Supply current: 125mA maximum

Indicators

• 8 yellow status indicators (field side, logic-driven)

Installation Guidelines

Follow these steps to install the TC-FOR081 correctly.

First, mount the module on a standard DIN rail. Push it firmly until the clip locks. Next, connect external 24V dc power within the 19.2-31.2V range. Meanwhile, ensure the fused terminal base has the correct 3.0A Littelfuse 239003 installed.

For wiring loads, use 12-gauge stranded wire. Strip the insulation to 1.2mm maximum. Also, verify the load voltage and current do not exceed the relay’s rating. For inductive loads, always add a snubber or suppression device. Finally, check the yellow LEDs after power-up. Each LED lights when its corresponding relay is energized by the logic.

Packaging List

• 1 x Honeywell TC-FOR081 relay output module

• 1 x DIN-rail mounting clip (pre-attached)

• 1 x Quick reference card

Frequently Asked Questions (FAQ)

1. Can the TC-FOR081 switch both ac and dc loads on different channels?
Yes. Each relay is fully isolated. You can mix ac and dc loads across the eight channels without any problem.

2. Why does my output show 1mA leakage when OFF?
The leakage comes from the internal snubber circuit. This snubber protects the relay contacts. It is normal and safe for most loads.

3. What fuse should I use with the Honeywell TC-FOR081?
Use a 3.0A Littelfuse 239003 per channel. The module has no internal fuses. You must provide external fusing through the terminal base.

4. How fast can the relays switch repeatedly?
The maximum switching frequency is one operation every 3 seconds (0.3Hz) at rated load. Slower switching extends relay life.

5. Which shipping carriers do you offer?
We ship using Fedex, UPS, and DHL. Tracking information is provided after dispatch.