Chapter 3 Connection 9
RDU-S Rack Data Unit User Manual
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2: 1-wire signal
3: NC
4: NC
Pin definition
1: VCC (5Vdc)
5: NC
6: NC
7: NC
8: GND
Figure 3-2 Pin definition of 1-wire sensor port
Connection method
Use a standard network cable with RJ45 connectors on both ends, insert one end into the 1-wire sensor port, and
insert the other end into the RJ45 port of SN-TH temperature & humidity sensor, SN-2D door dry contact sensor,
SN-3C dry contact sensor or SN-L leak detection sensor.
3.2.2 Connecting DI1, DI2 And DI3 Ports
The DI1, DI2 and DI3 ports are used to connect the digital sensors.
Port position
The positions of the DI1, DI2 and DI3 ports are shown in Figure 3-3.
DO2
12V G
ND
DO1
12V G
ND
USB
USB
Micro SD
USB CO
NFIG
ETH
DI1
DI2
DI3
COM1
DO1
DO 2
ALAR
M
POW
ER
RUN
TH_BU
S
COM2
COM1
1
2
TH_BUS
COM2
DI1 port
DI2 port
DI3 port
100-240V
~
Input
Figure 3-3 Positions of DI1, DI2 and DI3 ports
Pin definition
The pin definition of the DI1, DI2 and DI3 ports is shown in Figure 3-4.
1 2 3 4 5 6 7 8
2: NC
3: D1 (smoke sensor)
4: GND
Pin definition
1: 12Vdc
5: GND
6: D2 (door magnet sensor)
7: D3 (water sensor)
8: D4 (infrared sensor)
Figure 3-4 Pin definition of DI1, DI2 and DI3 ports
Connection method
Note
1. It is recommended to use the auxiliary sensors shown in Figure 3-5. If you want to connect other types of sensors, make the
connection cables according to the port pin definition in Figure 3-4 and then connect them.
2. Both vibration sensor and water sensor use D3 channel. If the vibration sensor is selected, it cannot share the same digital
sensor port with the water sensor.
3. The line sequence (see Figure 3-4 for detailed definition) of the DI1, DI2 and DI3 ports is fixed. The types of the sensors
connected to a port cannot be the same.
If the digital sensor (with a connection cable in factory) recommended by Emerson is connected, insert the RJ45
connector of the connection cable into the DI1, DI2 or DI3 port.
The recommended sensors are shown in Figure 3-5.
Summary of Contents for RDU-S
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