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RAD-900-...
PHOENIX CONTACT
3827_en_B
Figure 4-4
Connecting the power supply
In order to prevent damage to the wireless module, we recommend the installation of a
surge arrester. Wiring between the surge arrester and the wireless module should be as
short as possible. Please also observe the manufacturer’s specifications.
4.1.4
Serial interfaces
The RAD-900-IFS wireless module has one RS-232 interface and one RS-485 2-wire
interface. Connect the I/O device to the wireless module via the corresponding serial
interface.
4.1.4.1
Connecting the RS-485 cable
In RS-485 mode, an RS-485 network with several I/O devices can be created. Use a
twisted-pair, common shielded bus
RS-485 pin assignment
In RS-485 mode, you can create a network with several I/O devices. Use a twisted-pair bus
cable to connect the I/O devices. Install this bus cable with a termination network at the two
furthest points.
•
Connect the single wires of the data cable to the COMBICON plug-in screw terminal
•
Make sure the signal assignment is correct.
Both serial interfaces are deactivated by default. Activate and configure the RS-232 or
RS-485 interface using the PSI-CONF software (from Section 5.6, “Configuration via PSI-
You can only use one interface per wireless module. Parallel operation of both interfaces
is not possible.
NOTE:
Observe the polarity of the RS-485 cable. Install the bus cable with a termination network
at the two furthest points of the RS-485 network.
Termination resistors are integrated into the RAD-900-IFS and can be switched on using
the DIP switches on the side of the module.
+24
V
RSS
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D(B
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Re
s
et
RAD-ID
RAD-2400-IFS
S.PORT
8
8
PWR
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ER
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1.1
1.2
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