10 Chapter 3 Connection
RDU-S Rack Data Unit User Manual
EE-SD01S smoke sensor
ER-DR02J door magnet sensor
IRM-S01W water sensor
ER-ST01P infrared sensor
Figure 3-5 Recommended sensors
Connecting multiple signals of RJ45 ports
DI1, DI2 and DI3 ports can be connected with multiple signals simultaneously.
When a port is connected to multiple signals, RJ45 three-way connectors (optional) are required for transferring
according to the signal amount. Use standard straight network cables to cascade-connect the signals in daisy chain
mode and then connect them with the corresponding port. Figure 3-6 indicates the connection method that DI1 port is
connected with infrared sensor, door magnet sensor and smoke sensor.
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DI1 port
RJ45 three-way connector
RJ45 three-way connector
Network
cable
Network
cable
Connecting smoke sensor
Connecting door magnet sensor
Connecting infrared sensor
Figure 3-6 Connecting multiple sensors
When a port is connected with multiple signals simultaneously, you must note that the line sequence conflict of the
signals cannot occur. For example, the DI1 port can be connected with four sensors simultaneously. The
recommended sensors include smoke sensor, door magnet sensor, water sensor and infrared sensor. If the DI1 port
is connected with vibration sensor and water sensor simultaneously, signal conflict will occur, resulting in signal
acquisition failure, because both sensors use the DI3 channel.
3.2.3 Connecting IRM Sensor Port
The IRM sensor port (silkscreen: TH_BUS) is used to connect the IRM series temperature sensor and temperature &
humidity sensor.
Note
The address range of the IRM series temperature sensor and temperature & humidity sensor is 10, 11, 12, 13, 20, 21, 22 and 23;
besides the above addresses, the address range of the IRM series temperature sensor also includes 30, 31, 32, 33, 40, 41, 42 and
43.
Port position
The position of the IRM sensor port is shown in Figure 3-7.
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