Product characteristics

 AC220 V power supply, internal switching power supply design, voltage range AC85 ~ 265V;

 provide one 12V power output, load capacity 6W (0.5A / 12V), overload / short circuit protection;

 multiple input and output ports:

 3-way relay output with LED indication; load capacity AC220 30A;

 3 optical isolation inputs;

 2-channel analog input, supporting current transformer;

 2-channel RS485 data port, 1-way master, 1-way slave, RS485 master uses standard Modbus protocol, which can be connected with sensors, controllers and other MODBUS devices;

RS485 slave port uses standard Modbus protocol to connect with MODBUS server;

 integrated wireless sensor network (sleep tree protocol) function, 2.4G or 780mhz frequency band can be selected;

Through the wireless sensor network (sleep tree protocol), the wireless sensor nodes are directly connected;

 through the wireless sensor network (sleep tree protocol), complete the ad hoc network transmission between the main control nodes, and connect to the multi-functional gateway;

 integrate GPRS module to interact with remote server or control software, applicable to China Mobile or China Unicom;

 RF transmission power can be selected: - 11dbm ～ +10dBm@780MHz  , +3dBm@2.4GHz ;

Multi parameter configurable;

 working temperature: - 40 ~ 85 ℃;.

 dimension (mm): 145 (L) x89 (W) X40 (d)

Description and schematic diagram of network topology

Wems-ctl-m supports point-to-point, star network and tree network architecture

1) The network supports multi-level routing, and any node can be used as a routing node;

2) The network supports link self-healing and automatically repairs the transmission link;

Detailed specification

1、Technical index of 2.4GHz frequency band

Test conditions: VCC = 3.0V, working frequency: 2.45GHz, test temperature: 25 ℃

project	Parameter value	project	Parameter value
RF operating frequency	2.4～2.48GHz	Transmitting power	+3dBm
Wireless rate	250kbps	Receiving sensitivity	-101dBm
TX / RX RF interface impedance	50 Ohms	Open communication distance	750m
Number of available frequency bands	16	Frequency interval	5MHz
Single channel maximum control power	30A/AC220V	Environmental control relay control power	30A/AC220V
Operating humidity range	0-95% non condensing	Operating temperature range	-40～85℃

2、Technical index of 780mhz frequency band

Test conditions: VCC = 3.0V, working frequency: 782mhz, test temperature: 25 ℃

project	Parameter value	project	Parameter value
RF operating frequency	779～787MHz	Transmitting power	0～+10dBm
Wireless rate	20/250kbps	Receiving sensitivity	-110dBm
TX / RX RF interface impedance	50 Ohms	Open communication distance	2km
Number of available frequency bands	4	Frequency interval	2MHz
Single channel maximum control power	6KW	Environmental control relay control power	30A/AC220V
Operating humidity range	0-95% non condensing	Operating temperature range	-40～85℃

★Note: the wireless communication distance is related to the working environment, climate, antenna installation mode, etc. the communication distance indicated in this table is limited to the test site designated by our company.

3. RS485 interface index

　1) Baud rate: 1200 ~ 115200bps

　2) Optocoupler isolation: 1.5kV

　3) Polarity mode: polarity, divided into a / b line

4. 12V power supply index

　1) Output voltage: DC12V, ± 0.5V

　2) Maximum output power: 6W

　3) Ripple: < 100mvp-p

5. Digital input index

　1) Number of channels: 3

　2) Input signal level: 12V

6. Analog input index

　1) Number of channels: 2

　2) Input signal level: < 3vp-p

ordering information

Module model	Working frequency band	Supply voltage	working temperature
WEMS-LDK-M/780	779-787MHz	AC-220V	-40～85℃
WEMS-LDK-M/2400	2.4-2.48GMHz	AC-220V	-40～85℃