Ward pager principle and circuit diagram

With the development and application of wireless technology, the ward pager system can instantaneously communicate and move to receive call information. Some pagers have been developed and manufactured on the basis of FM wireless technology. It combines a single chip and computer technology to develop a system. .

In general, its working principle is as follows: place a caller on each hospital bed, when the patient needs service, just press the caller's use button, the receiver can display the bed number and send out a music prompt, and the medical staff can Prompt information to know the exact hospital bed to be served and make corresponding service.

Schematic diagram of ward pager circuit

Let's take a deep analysis of its circuit principle and circuit design and implementation principle with the circuit of one kind of ward caller (ward call system circuit diagram). It is mainly composed of the following three major parts: power circuit, trigger control circuit and acousto-optic call circuit. These three major parts are independently connected with each other, and complete the realization of the function of the entire system. Let me talk to you about the selection of electronic components and parameters of electronic components used in the circuit diagram.

A, VD use 1 N5401 silicon rectifier diode;

B, C1 use aluminum electrolytic capacitors with a withstand voltage of 35V;

C, C2 use aluminum electrolytic capacitors with voltage resistance value of lOV;

D, VS use 1 / 2W, 3V silicon voltage stabilizing diode;

E, R1 ~ R6 all use 2 ~ 4W wire wound resistors;

F, R7 use 1 / 2W metal film resistor;

G, IC choose KD9300 or C W9300 type music integrated circuit;

H, K1 ~ K3 use JRX-13 F type 6V DC relay;

I, BL use 0. 25W, 8 Ω electric speakers;

J, V use 59013 silicon NPN transistor;

K, T use 5VA, secondary voltage is 18V power transformer;

L, S1 ~ S3 use button self-locking switch or boat switch;

M, HLl ~ HL6 all use 6.3V, 0.1 A red indicator bulb;

N, HL7 ~ HL9 use 220V, 10 ~ 20W red bulbs;

The principle analysis of power supply is as follows:

In the circuit, the power circuit is composed of a fuse FU, a power transformer T, a rectifier diode VD, a filter capacitor C1, a current limiting resistor R7, and a zener diode VS; the trigger control circuit is composed of S1 ~ S3 (bedside switch of the ward), resistance R1 ~ R6 and indicator lights HL1 ~ HL6 and relays K1 ~ K3; the acousto-optic call circuit is composed of indicator lights HL7 ~ HL9, K1-K3 normally open contacts, capacitor C2, music integrated circuit IC, transistor V and speaker BL composition.

After the AC 220V voltage is stepped down by T, VD rectified and C1 filtered, it generates 18V DC voltage, one way as the working power supply of the trigger control circuit; the other way through R7 current limiting and VS voltage regulation as 3V DC voltage, as the working power supply of the IC. When S1 ~ S3 are not pressed, HL1 ~ H19 are not lit, and BL does not sound. When a switch in S1-S3 is pressed, the relay is energized and the indicator light is on; at the same time, the IC is energized and the music electrical signal output from its 0 / P terminal is amplified by V, which drives the BL to emit music.

For example, when S2 is pressed, HL3 and HL4 are lit, and K2 is energized and attracted, and its normally open contacts K2-1 and K2-2 are connected, so that H L8 is lit, and BL emits music.

Ward pager functions and features

A. No wiring, simple installation and maintenance;

B. Improve service response speed, can guarantee to be on call;

C. It can not only solve bedside calls, but also emergency calls in toilets, activity rooms, etc .;

D. The procedure for the patient to call the service is simpler, just press the button used;

E. Medical staff can take it with you and can provide services in any corner of the place;

F. You can communicate without creating loud noises and create a good medical environment;

G. Reduce labor costs, a medical staff can monitor several wards;

H. Reduce management costs, no need for multi-level human monitoring, improve management efficiency, and save management personnel;

I. Two-way call, dual-function call, multi-function display of the host, multi-level nursing settings, fault self-test alarm, emergency call function and other functions

How to use ward pager

A. The patient presses the corresponding button of the wireless pager to initiate a call to find a staff member;

B. You can know which room or which bed is called and which type of call is made by the LED display host.

C. You can get the call content through the digital information machine you carry, and there are many prompt methods such as vibration and music;

D. Install call supervision and management software to query call records;

E. Managers can also be equipped with wireless dispatch handles or wireless keyboard callers to dispatch service personnel and group call alarms

Simple Ceiling Light.


simple ceiling lighting a creative  pendant light


simple style ceiling light is for North America, Southeast Asia, Eastern Europe, Africa(except Middle East), Hong Kong/ Macao/ Taiwan, Latin America, Japan & Korea, Mainland China, Western & Southern Europe, Northern Europe, Central & Southern Asia, Middle East market.


simple ceiling light

simple ceiling light,simple ceiling lighting,simple style ceiling light

Monike lighting , https://www.monikelight.com

Posted on