ELPRO 805U-E Instrukcja Użytkownika Pobierz pdf (Strona 14)

805U-E Wireless Ethernet User Manual

Man_805U-E Rev 1.5 Page 14

2.3 Power Supply

The 805U-E module can be powered from a 10 - 30VDC power supply. The power supply

should be rated at 1 Amp. The negative side of the supply should be connected to a good

“ground” point for surge protection. The supply negative is connected to the unit case

internally.

The positive side of the supply

must not be connected to earth.

The DC supply may be a floating

supply or negatively grounded. The

power requirements of the 805U-E

unit is 280mA @ 12V or 150mA

@ 24VDC. This is inclusive of

radio and Ethernet ports active, &

serial port plugged in.

Transmission current (500mW RF) is nominally 500mA at 12V, 250mA at 24VDC.

A Ground Terminal is provided on the back of the Module. This Terminal should be

connected to the Main Ground point of the installation in order to provide efficient surge

protection for the Module (Refer to the Installation Diagram)

2.4 Serial Connections

2.4.1 RS232 Serial Port

The serial port is a 9 pin DB9 female and provides for connection to a host device as well as

a PC terminal for configuration, field testing and for factory testing. Communication is via

standard RS232 signals. The 805U-E is configured as DCE equipment with the pinouts

detailed below.

905U-E

DB9

MALE

DTE HOST

DB9

FEMALE

905U-E

DB9

MALE

DCE HOST

DB9

MALE

Hardware handshaking using the CTS/RTS lines is provided. The CTS/RTS lines may be

used to reflect the status of the local unit’s input buffer, or may be configured to reflect the

status of CTS/RTS lines at the remote site. The 805U-E does not support XON/XOFF.

Example cable drawings for connection to a DTE host (a PC) or another DCE hosts (or modem)

are detailed above.

COM

DIO

805U-E

VDC

RS485

SUPPLY

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 79 80

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