Digital display electronic clock with low power consumption

1Overview of Digital Display Electronic Clocks

Provided by Shanghai Ruicheng Electric Co., LtdDigital display electronic clock with low power consumptionThis is a highly intelligent and functional clock system that complies with relevant national and industry norms and standards, and is designed strictly in accordance with the various special requirements of the hospital's intelligent building project for the clock system. It can achieve unified time standards throughout the hospital, so that staff and patients can grasp accurate and unified time information at any time. It enables various business departments and functional departments to work in an orderly and coordinated manner, providing a standard time basis for organic coordination and close cooperation between various functional departments, ensuring adaptation to the high-speed operation needs of various related businesses in the hospital's intelligent building.

2Networking method of digital display electronic clock

generally haveRS485Bus mode, Ethernet modeWIFIWireless modeCDMAWireless methods will be compared below to consider choosing the appropriate method.

2.1 RS-485Bus mode

RS-485Bus is a serial network that uses differential transmission and is currently one of the most widely used long-distance serial data methods in China.RS-485The bus uses ordinary twisted pair cables as the transmission medium, adopts a linear topology structure, and a single network line can be connected32A node (data from)MAXIMcompanyMAX485Data manual), the total network length can reach1200Rice.

Advantages: For a single node, the circuit cost is low, the design is easy, and the implementation is convenient.

Disadvantages: Poor reliability, single node failure may cause the entire network to crash;RS-485Devices are prone to damage; And it is difficult to define the faulty nodes in the network, resulting in relatively high maintenance costs.

Scope of application: With a small number of nodes, the transmission distance is within1Around kilometers, in situations where safety requirements are not high.

2.2 Ethernet mode

Ethernet is one of the widely used communication methods internationally, widely used in basic communication construction in buildings. As Ethernet was already built and can be used normally during the construction of buildings.

Advantages: High reliability, can support plug and play of hardware nodes. Can fully utilize certain areasPOESwitch, usingPOEThe method of supplying power to the sub clock saves the cost of laying power lines.

Disadvantages: The cost of network construction is slightly higher; But it can fully utilize the existing network resources and reduce the workload of wiring.

Scope of application: Can be used for a large number of nodes, with a transmission distance of10Within kilometers, in situations with high safety requirements.

2.3 WIFImethod

WIFIIt is an extension of the existing Ethernet, which can expand multiple terminals at one point and is now widely used in different fields. Nowadays, it is available in schools, hospitals, office areas, homes, and public areasWIFINetwork coverage,WIFIThe application is becoming increasingly widespread.

Advantages: High reliability and convenient construction.

3Characteristics of digital sub clocks in digital display electronic clocks

High synchronization accuracy - using intelligent time compensation technology

Long visible distance and good angle - using high brightnessLEDAnd anti glare panel

Low power consumption - using dynamic scanning technology and can achieve timed switching

Constant current drive, bidding farewell to traditional voltage drive,Significantly extendedLEDlifespan

Intelligent management - can communicate with the upper computer and monitor the running status in real time

4Technical parameters of digital sub clocks in digital display electronic clocks

Power supply:220VorPOE

power waste:3W～30W

LEDDisplay unit luminous intensity: ≥200cd/m2

Contrast ≥10：1

LEDThe viewing angle of the display screen is ≥ ±75º

Timing accuracy: ≤1ms

Self travel time accuracy: ≤±0.05second/sky

MTBF：≥150000hour

Average repair time（MTTR）Generally not greater than30divide

The service life shall not be less than20Under normal usage conditions, no maintenance is required

Electromagnetic compatibility: Level III or above standard

Installation methods: lifting, wall mounting, inlay, installation on pillars, etc

5Characteristics of pointer sub clocks in digital display electronic clocks

High synchronization accuracy - using intelligent time compensation technology

Multiple timing methods -RS422/485TheNTP/SNTPNetwork, wirelesswifiTheCDMAThe4G

Intelligent management - can communicate with the upper computer and monitor the running status in real time

6Technical parameters of pointer sub clocks for digital display electronic clocks

Operating Temperature-20℃～＋70℃； humidity<95%

Power supply:220VorPOE

torque 800gram.centimeter

Timing accuracy: ≤1ms

Self travel time accuracy: ≤±0.1second/sky

7、Digital display electronic clock with low power consumptionInstallation of

All single face clocks can be installed by hanging or hoisting, while double-sided clocks can only be installed by hanging or hoistingInstallation method for hoisting. Our company also has embedded sub clocks, specifically designed for embedded installation.

7.1 Hanging method

The back of the single face clock is pre installed with stamped wall mounting holes. The power and signal lines of the single-sided digital sub clock are connected through the top opening by default, or can be customized to be connected through the back opening. The power and signal lines of the single-sided pointer clock are connected through the back opening.

7.2 Lifting method

Both single-sided and double-sided sub clocks can be installed by lifting. Randomly equipped with suspension rods, default size of suspension rods: length300mm, diameter20mmThe length of the suspension rod can be customized.

7.3 Embedded installation method

Embedded clock is mainly used in biochemical and pharmaceutical enterprises.