14
15
G
Mounting and Installation
General
The radio frequency gateway GW-xx-FEM is a device for on-wall installation and serves as bidirectional gateway between the units of a
radio frequency bus system (radio sensors and radio actuator on basis of EnOcean technology) and devices like PC, PLC, and controller
systems with RS232 or RS485 interface. All radio telegrams from radio transmitters received faultless by the gateway are packed into
a telegram frame and output at the bus side. All bus telegrams received faultless by the gateway from the bus side are sent out at the
radio transmitter side in form of EnOcean telegrams. In this way, a bidirectional connection between PC ⁄ PLC systems at one side and the
radio transmitters and radio signal receivers of a radio frequency bus system at the other side can be established by the radio frequency
gateway. In order to enable a reduction of telegram occurrences at the bus side to a minimum, the gateway is provided with a filter. When
the filter is activated, only telegrams received from those radio transmitters are output by the gateway at the bus side, of which the
transmitter IDs have been learned in by the filter.
RS 232
Principle
GW2 - RS 232- FEM radio frequency gateways are connected via screw terminals to the 232 bus cable. The bus cable must be twisted-pair,
preferably shielded T-wire cable 1 x 4 x 0.8 mm
2
.
At one RS 232 bus cable, always only two devices, i. e. radio frequency gateways, plus the master in form of a PC or PLC system for
example can be connected.
The bus cable should never exceed a maximum length of 15 m.
The gateway can be supplied by DC power of 10 - 30 V DC via terminals 1 and 2.
RS232
+V Rx Tx GND
Gateway
SPS and
DC-Supply
Connecting terminals
Screw terminal block X1 for T-wire cables and strands of 0.5 - 1 mm
2
PIN .................... Name ................ Legend
1 ........................ GND ................... Minus, ground, reference potential
2 ........................ +VDC ................. Plus, voltage supply 10 - 30 V DC
3 ........................ B ........................ Rx – RS 285 data line receiving
4 ........................ A ........................ Tx – RS 285 data line transmitting
5 ........................ GND ................... Minus, ground, reference potential
The following list shows the pin assignment of a 9-pole D-SUB connector
to establish correct communication with the RS 232 gateway:
PIN at the D-SUB9 socket
of the master system .............. Assignment ................................ Terminal
1 .................................................... Not assigned
3 .................................................... Rx receiving ................................ No. 3
2 .................................................... Tx transmitting ........................... No. 4
4 .................................................... Connection to PIN 6
5 .................................................... GND ⁄ ground .............................. No. 1
6 .................................................... Connection to PIN 4
7 .................................................... Connection to PIN 8
8 .................................................... Connection to PIN 7
9 .................................................... Not assigned
SUB-D9
SUB-D9
SUB-D9
SUB-D9
DSR in
RXD in
RTS out
TXD out
CTS in
DTR out
GND
DSR
RXD
RTS
TXD
CTS
DTR
GND
GND
TXD in
RXD out
(DTE)
(DCE)
1
6
2
7
3
8
4
5
9
1
6
2
7
3
8
4
5
9
1
6
2
7
3
8
4
5
9
1
6
2
7
3
8
4
5
9
Serial cable
Computer
Modem
Connector Socket
Connector Socket
