Installation

2.4Connect Power to the Liqui-tect Panel

The Liqui-tect panel requires 24VAC for proper operation. Liebert recommends using the optional Transformer Module manufactured by Liebert or another UL-approved Class 2 power unit to obtain proper voltage. If the power unit is not a Class 2 circuit, it must be protected with an IEC 5 x 20mm time lag 2A fuse. For information, consult your local dealer, Liebert representative or the Liebert Worldwide Support Group.

! WARNING

Check that power is removed from wires prior to installation.

! CAUTION

The Liqui-tect panel is designed for use on properly grounded (earthed) 24VAC power, 50Hz or 60Hz. The ground wire for the power lead must be wired to the earth ground terminal (stud located next to the 24VAC terminal block).

This equipment is intended to be installed by a qualified and certified electrician who must review and approve customer supplied wiring and circuit breakers, verify correct input and grounded (earthed) connections to ensure compliance with technical standards and national and local electrical codes.

! WARNING

Be sure that the power wiring is disconnected from the Liqui-tect panel before installing any wiring to this unit.

2.4.1Input Power Connections - Small Enclosure

To connect electrical power:

1.Run conduit and electrical wiring from building to the Liqui-tect panel.

2.Use copper wires only; proper wiring to use for 24VAC power is 18-22 AWG stranded and shielded (18 AWG is recommended—see Table 4). Strip wires 1/2".

Figure 5 Electrical connections to panel

External wiring through knockout

Ground wire (black)

Earth ground

R4

TB1

24V Power

TVS3

FB2

 

terminal

24VAC wiring (red & white)

EGND1

Reset

SW3

24VAC input connector

3.Secure the incoming electrical service wires to the Liqui-tect panel’s 24VAC input by sliding the wires into TB1, the 24VAC input terminal block. There is no polarity requirement when connecting to TB1. The ground wire must be connected to the earth ground terminal located on the side of the panel (see Figure 5).

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Emerson MC68HC16Z1 Connect Power to the Liqui-tect Panel, Input Power Connections Small Enclosure, 24VAC input connector

MC68HC16Z1 specifications

The Emerson MC68HC16Z1 is a versatile microcontroller that combines power and efficiency, making it an ideal choice for various embedded applications. As part of the Motorola 68HC16 series, the MC68HC16Z1 is designed to deliver robust performance while offering extensive support for both simple and complex tasks. With its 16-bit architecture, this microcontroller is well-equipped to handle a range of functionalities, from industrial control systems to automation processes.

One of the main features of the MC68HC16Z1 is its high-performance 16-bit CPU, which operates at speeds up to 20 MHz. This allows for efficient data processing and execution of instructions, which is critical in time-sensitive applications. The microcontroller boasts a rich instruction set, including various addressing modes that enhance programming flexibility. This versatility enables developers to implement efficient algorithms tailored to their specific application needs.

Power management is another noteworthy characteristic of the MC68HC16Z1. The device supports low-power operation modes, which is essential for battery-powered applications or scenarios where energy consumption is a concern. With its capability to switch between different operational states, the microcontroller can significantly extend battery life while ensuring that performance is not compromised.

The MC68HC16Z1 also includes an integrated analog-to-digital converter (ADC) that allows for direct interaction with analog signals. This feature is particularly beneficial in applications that require sensor data acquisition. Additionally, the microcontroller provides various communication interfaces, including serial communication options like UART and SPI, facilitating seamless data transfer between devices.

In terms of memory, the MC68HC16Z1 supports a wide range of options, including both RAM and ROM, allowing for flexible storage solutions depending on the application requirements. The built-in programmability further allows for updates and modifications to the firmware, ensuring that the system can adapt to evolving project specifications.

Moreover, the microcontroller features an extensive array of I/O ports, making it capable of interfacing with various peripheral devices such as sensors, actuators, and displays. This extensive connectivity enhances its usability in a range of applications, from robotics to automotive systems.

In summary, the Emerson MC68HC16Z1 microcontroller stands out for its balanced blend of performance, low power consumption, and feature-rich design. Its 16-bit architecture, integrated ADC, versatile communication interfaces, and extensive memory options make it a go-to choice for developers looking to create effective and reliable embedded systems. Whether for industrial automation or consumer electronics, the MC68HC16Z1 continues to be a dependable and powerful component in the realm of microcontroller technology.