Siemens SIMATIC RF600 System Manual page 146

Antennas
6.1 RF660A antenna
Figure 6-4
Connecting RF660A to RF660R
Preassembled standard cables in lengths of 10 m and 20 m are available for connection.
The cable between antenna and reader can be up to 20 m in length.
When less than four antennas are used, we recommend that the antennas are connected to
the reader as follows:
Number of antennas
2 antennas
3 antennas
Connecting RF660A to RF630R
Preassembled standard cables in lengths of 3 m, 10 m and 20 m are available for
connection.
The cable between antenna and reader can be up to 20 m in length.
When one antenna is used, it is recommended that the remaining antenna connection is
sealed using the supplied protective cap.
146
Rear of antenna with RTNC connection
Connections on the reader
ANT 1, ANT 2
ANT 1, ANT 2, ANT 3
System Manual, 10/2009, J31069-D0171-U001-A8-7618
SIMATIC RF600