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saia-pcd.com
Consumption data collection
5
Switch cabinet
components
4
Consumer
data acquisition
3
Dedicated
room controllers
2
Operation
and monitoring
1
Automation
stations
System properties
Radio transmission of RS-485 interfaces (Modbus and S-Bus)
869 MHz band
Can be used in Europe with no approval required
Can be used as Point to Point, multipoint or repeater
Internal or external antenna
Galvanic isolation between supply and bus
Status LEDs at the front
NFC interface
Configuration using FBoxes
The PCD7.T4850-RF RF modem transparently transfers the connected RS-485 interface (Modbus and S-Bus) via
radio. The frequency range of 869 MHz can be used in Europe. The devices can therefore be operated using the
self-declaration with no additional approval required. The modules have an integrated antenna that enables data
to be transferred with no additional hardware required. If an external antenna is required, it can be connected
via a connector on the front plate. The classic hat-shape enables the 35 mm wide housing to fit into an electri-
cal control cabinet. The device has rotary switches for parameter configuration that allows the speed of RF-data
transmission and radio channel to be selected.
Technical Data
Interfaces
Wire-connected
communication interface
RS-485 with galvanic isolation
Baud rate: 2,400, 4,800, 9,600, 19,200, 38,400, 57,600, 115,200 bps (autobauding, parity detection)
Radio communication
2,400, 9,600, 38,400, 57,600 bps, selected with rotary knob
Frequency band
869.475…869.6 MHz
Frequency channels (sub-bands)
4 channels, selected with rotary knob
Radio range (line of sight)
Internal antenna: 1000 m @2400 bps
External antenna: 6000 m @2400 bps
Service interface
NFC (near field communication)
General specifications
Supply voltage
230 VAC, −20/+15%, (50 Hz)
Electrically isolated
2.3 kVDC between current supply and RS-485
Dimensions
Housing width 2 HP (35 mm), compatible with electrical cabinet (in accordance with DIN 43880, size 2 × 55 mm)
Mounting type
DIN rail in accordance with DIN EN 60715 TH35 (1 × 35 mm)
Ambient temperature
Operation: 0…+55°C without forced ventilation
Storage: −40…+70°C
Power consumption
< 4 W
Adapter for external antenna
An adapter is supplied to connect an external SMA antenna to the radio module
Accessories
PCD7.K840
External antenna Antenna with SMA connection plug
The PCD7.T4850-RF device may be used in all EU countries including Switzerland and Norway.
Approvals for other countries are listed in the clarification.
The limitation of broadcasting time must be limited in accordance with standard ERC 70-03 to 10%.
Device design
RS-485 interface
Antenna connection
Address switch
Supply
System LEDs
Connection example
4.3
Radiomodem PCD7.T4850-RF
(RF modem, RS-485)
