AutomationDirect C0-08TR Relay Output Module

The AutomationDirect C0-08TR is an 8-point, relay output module designed for use with AutomationDirect's CLICK and CLICK PLUS Programmable Logic Controllers (PLCs). It allows the PLC to control external devices (like contactors, solenoids, lights, etc.) by switching electrical circuits ON or OFF using built-in relays. The "TR" in the model name specifically indicates "Transistor Relay," although in this context, it refers to mechanical relay outputs.

Product Detailed Description

• Function: The C0-08TR acts as an interface between the PLC's internal logic and external loads. When the PLC's program instructs an output to turn ON, the corresponding relay on the C0-08TR module closes, completing an external circuit and powering the connected device. When the PLC instructs it to turn OFF, the relay opens, breaking the circuit.

• Output Type: It features 8 Form A (SPST - Single Pole, Single Throw) relay outputs. This means each output is a simple ON/OFF switch.

• Voltage Versatility: A key advantage is its ability to switch both AC and DC voltages, making it versatile for various applications. It can handle a wide range from 6-240 VAC and 6-27 VDC.

• Isolation: The module includes 2 isolated commons, with 4 points sharing each common. This isolation helps to protect the PLC from voltage spikes or faults in the output circuits.

• Removable Terminal Block: It comes with a removable terminal block, which simplifies wiring and module replacement, as you can pre-wire the block and then simply plug the module in.

• Compatibility: It's designed to seamlessly integrate with the CLICK and CLICK PLUS PLC systems, stacking easily onto the CPU or other I/O modules.

• Indicators: Typically, each output point will have an LED indicator to show its ON/OFF status, aiding in troubleshooting.

Product Parameters

(Note: These are typical parameters for the C0-08TR. Always refer to the official AutomationDirect documentation for the most precise and up-to-date specifications.)

• Number of Outputs: 8 points

• Output Type: Relay (Form A / SPST - Single Pole, Single Throw)

• Operating Voltage Range:

• AC: 6 - 240 VAC

• DC: 6 - 27 VDC

• Maximum Current per Point: 1 Amp (A) resistive

• Maximum Current per Common: 4 Amps (A) resistive (since there are 2 commons, 4 points per common)

• Minimum Load Current: Typically 5mA @ 5VDC (for relay reliability)

• Maximum Inrush Current: 5A for 10ms

• Response Time:

• OFF to ON: < 15ms

• ON to OFF: < 15ms

• Isolation: 2 isolated commons (4 points per common)

• Life Expectancy (Relay Life - typical at room temperature):

• 24VDC, 1A Resistive: 100,000 cycles

• 24VDC, 1A Inductive: 50,000 cycles

• 110VAC, 1A Resistive: 100,000 cycles

• 110VAC, 1A Inductive: 25,000 cycles

• Indicators: Output Status LEDs (typically red for each point)

• Bus Power Required (24VDC): Max. 90mA (All Outputs On)

• Terminal Block: Removable 11-position terminal block included.

• Operating Temperature: 0°C to 55°C (32°F to 131°F)

• Storage Temperature: -20°C to 70°C (-4°F to 158°F)

• Ambient Humidity: 30% to 95% relative humidity (non-condensing)

• Agency Approvals: UL Listed File #: E157382, RoHS Compliant.

• Country of Origin: China

• Dimensions (approx.): 3.8 cm x 7.6 cm x 8.9 cm (1.5 in x 3.0 in x 3.5 in)

• Weight (approx.): 0.177 kg (0.39 lb)

Product Advantages

• Versatile Output: Capable of switching both AC and DC loads over a wide voltage range, reducing the need for different module types.

• Cost-Effective: As part of the CLICK PLC family, it offers an economical solution for industrial control applications.

• Easy Integration: Designed for simple "CLICK-able" stacking onto the CPU or other I/O modules, simplifying system expansion.

• Removable Terminal Block: Facilitates quick wiring, installation, and module replacement without disturbing field wiring.

• Isolation: Isolated commons provide a degree of protection for the PLC from external load circuit issues.

• Visual Status Indicators: LEDs for each output point provide immediate feedback on output status, which is valuable for troubleshooting.

• Robust Relays: Designed for industrial environments, offering a reasonable number of switching cycles for general-purpose applications.

• Compact Size: Saves panel space in control cabinets.

Precautions

• Load Current Limits: Strictly adhere to the maximum current ratings per point (1A) and per common (4A). Exceeding these limits will significantly reduce relay life or cause immediate failure. For higher current loads, use the relay output to energize an external contactor or interposing relay.

• Inductive Loads: When switching inductive loads (e.g., solenoids, contactor coils), implement surge suppression (e.g., flyback diodes for DC, MOV for AC) across the load to protect the relay contacts from arcing and premature wear. Inductive loads significantly reduce relay life.

• Voltage Compatibility: Ensure the voltage of the external device being switched is within the specified 6-240 VAC / 6-27 VDC range for the module.

• Wiring Practices: Follow good industrial wiring practices, including proper wire sizing, insulation, and secure termination to the removable terminal block. Ensure proper grounding.

• Environmental Conditions: Install the module within its specified operating temperature and humidity ranges. Avoid areas with excessive vibration, corrosive gases, or extreme dust.

• Safety Interlocks: For critical safety functions, do not rely solely on PLC relay outputs. Implement hardwired safety circuits with dedicated safety relays or safety-rated components.

• Fuse Protection: It is highly recommended to externally fuse each output circuit to protect the relay and the load from overcurrents and short circuits. The module itself generally relies on external protection.

• Hot Swapping: Avoid installing or removing I/O modules while power is applied to the PLC system unless explicitly stated as supported in the PLC manual, as this can damage the module or CPU.

Product Applications

The AutomationDirect C0-08TR relay output module is suitable for a wide range of general-purpose industrial control applications where digital ON/OFF control of various loads is required.

• Motor Control:

• Starting/stopping small motors (via contactors or motor starters).

• Controlling motor starter coils.

• Solenoid Valve Control:

• Activating pneumatic or hydraulic solenoid valves for cylinder or fluid control.

• Indicator Lights/Alarms:

• Turning ON/OFF stack lights, warning lights, or audible alarms.

• Heater Control:

• Switching small heating elements (usually via SSRs or larger contactors if the current is high).

• Conveyor Systems:

• Controlling conveyor start/stop, diverters, or indexing mechanisms.

• Packaging Machinery:

• Controlling various actuators, grippers, or labeling mechanisms.

• General Machine Control:

• Interfacing the PLC with various electromechanical devices in a machine.

• Building Automation:

• Controlling simple lighting circuits, fans, or dampers.

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