Honeywell MC-TDOY22 Digital Output Field Termination Assembly

Equipped with 16 digital output channels, capable of outputting industrial-standard switching signals (e.g., 0V/24V DC) to control actuators such as solenoid valves, relays, and indicator lights.

Supports open-collector output (or transistor output), compatible with various load types, with fast response speed (typically ≤1ms), suitable for high-speed switching control scenarios.

Operating voltage: 24V DC (typical value). The input signal logic high range is usually 11-30V DC, and logic low is 0-5V DC.

Maximum output current per channel: Typically ≤0.5A (subject to the product manual), supporting inductive loads (requiring freewheeling diode protection) or resistive loads.

DIN rail mounting: Adapts to standard industrial control cabinet layouts, supporting quick installation and disassembly for easy maintenance.

Fixed screw terminal wiring: Ensures secure cable connections, reduces the risk of poor contact, and is suitable for long-term reliable operation in industrial environments.

Optical coupling isolation is adopted between the output channels and the backplane (isolation voltage typically ≥500V AC), effectively blocking external electromagnetic interference and protecting the control system.

High anti-noise design enables stable operation in strong electromagnetic environments (e.g., near frequency converters and motors) to avoid misoutput.

Each channel is equipped with an LED indicator to display the output status (e.g., on/off) in real time, facilitating on-site debugging and fault troubleshooting.

Supports fault diagnosis functions (such as overload and short-circuit protection), and some models can feedback abnormal status through backplane communication.

Operating temperature range: Usually -40°C to +70°C (wide-temperature models can be extended to -40°C to +85°C), adapting to high and low-temperature industrial environments.

Humidity range: 5%~95% RH (non-condensing), protection class IP20, suitable for indoor control cabinet installation.

The module receives output commands from the controller (such as "turn on channel 1") through the backplane bus (e.g., Honeywell's ControlNet, EtherNet/IP, etc.).

The internal logic circuit decodes the commands to determine the channels and states (high/low level) that need to be output.

Command signals are transmitted through an optical coupler isolator to prevent external circuit interference from affecting the controller.

The isolated signals are amplified by transistors (or relays) to output sufficient current to drive loads (such as solenoid valves and contactor coils).

When the transistor is on, the output is connected to the power supply (e.g., 24V DC), and the load works; when the transistor is off, the output is disconnected, and the load stops working.

The LED indicator displays the output status synchronously, and some models can detect load abnormalities (such as short circuits and overloads) through a diagnostic circuit and feedback to the controller.

Controls robotic arm grabbing actions, conveyor start/stop, pneumatic valve switching, etc., to achieve precise execution of production line automation processes. For example, in an automobile welding line, the DO module controls the lifting of the welding gun and the on/off of the welding current.

Drives the opening/closing coils of high-voltage switches, controls standby power supply switching, alarm indicator start/stop, etc. For example, in a substation, when a power grid fault is detected, the module outputs a signal to trigger the circuit breaker to trip and protect the equipment.

Controls the start/stop of reactor agitators, material transfer pumps, safety valve actions, etc. For example, in a chemical reaction process, the DO module automatically starts the cooling water pump according to the temperature sensor signal.

Controls electromagnetic locks of access control systems, fire smoke dampers, start/stop of air conditioning system fans, etc. For example, when a fire alarm is triggered, the module outputs a signal to linkage open the smoke dampers on all floors to ensure safe evacuation.

Controls the start/stop of aeration fans, sedimentation tank sludge scrapers, chemical dosing pumps, and other equipment in sewage treatment plants to achieve automated control of the water treatment process.

High reliability: Optical coupling isolation design and wide temperature working range, suitable for harsh industrial environments.

Fast response: Transistor output with fast response speed, suitable for high-frequency switching control scenarios.

Flexible expansion: Supports seamless integration with other Honeywell controllers (such as PlantScape and PKS systems), facilitating system expansion.

Easy maintenance: DIN rail mounting and status indicator design reduce on-site debugging and maintenance difficulties.