7008C13

The 708C13 is an optically isolated two-channel digital relay module designed to accept two independent 24 Vdc input signals to switch up to two external devices.

The 708C13 is used in a variety of applications such as controlling a power source on/off switch, small motor controllers, switching between multiple power sources, and providing redundancy to safety systems. They can be used in either a single cut-off or dual-channel mode. The 708C13 is very versatile and can also be used to monitor an AC process signal, or respond to a remote switch or signal.

Application Field:

The 708C13 is employed in a variety of environments, from hazardous areas to control rooms. Due to its exclusive optical isolator technology, it can be used in intrinsically safe applications, allowing for electrical isolation between various applications and equipment in contact with hazardous materials or environments.

The 708C13 can also be used to perform logic functions, drive isolated relays, or interface to isolated logic inputs. With the 708C13 module, users can monitor and control switching operations, providing an effective way to automate processes, save energy, and ensure safety.

The 708C13 is suitable for use in applications such as:

• Industrial automation control
• HVAC control (heating, ventilation, air conditioning)
• Security systems
• Electrical distribution
• Lighting control

Working Principle:

The 708C13 works by receiving an electrical signal from an input device and interpreting it as a switch contact order. The input devices can be connected to the 708C13 module in either single-pole-double throw or double-pole-double throw configurations. The 708C13 module then checks the state of the input device and interprets the switch contact order accordingly.

Once the switch contact order is received, the 708C13 module relays the switch contact order information to the connected output devices. Output devices typically include power relays, contactors, or other types of switches. The 708C13 module provides the electrical isolation required between the input device and the output device, allowing electrical shock protection for the user.

Another feature of the 708C13 module is its external control inputs. The external control inputs can be used to selectively switch the output device on/off, even if the switch contact order from the input device is still active. This allows the user to implement logic and timing functions, to more easily integrate the 708C13 module with other control components or systems, or to override the input signal.

In addition, the 708C13 module can be used to monitor AC process signals. It can be connected to an AC supply line and set up to trip an output device whenever the energy level of the AC signal deviates from an acceptable range. This feature adds to the flexibility of the 708C13 module and can be used in applications such as temperature control systems or motor overload protection.