Wiring
17
4.2.6 "Ethernet" option
Ethernet connection
An IEEE 802.3 compatible connector on a shielded RJ45 plug on the rear side of the unit is available
as a network connection. Through this connection, the unit can be connected with a hub or switch
to units in an office environment. For safe spacing distances, the office equipment standard EN
60950 must be observed. The pin assignment corresponds to a standard MDI interface (AT&T258),
so that a shielded 1:1 cable with a maximum length of 100 meters (328 ft) can be used here. The
Ethernet interface is designed as 10BASE-T. Direct connection to a PC is possible with a crossover
cable. Half duplex and full-duplex data communication is supported.
Fig. 8: RJ45 socket (assignment AT&T256)
LED description
Beneath the Ethernet connection (see rear of unit) there are two light emitting diodes which
indicate the status of the Ethernet interface.
• Yellow LED: link signal; is on when the unit is connected to a network. If this LED is not
illuminated then communication is impossible.
• Green LED: Tx/Rx; when the unit is receiving or sending data it flashes irregularly, otherwise is
continuously on.
4.2.7 USB connection
USB connection
A compatible USB connection (V1.1, lowspeed 1.5 Mbit/s) is available on a shielded USB-B socket
at the front of the unit. The unit can be connected to a laptop via this connection. The pin
assignment corresponds to a standard USB interface, so that a shielded standard cable with a
maximum length of 3 meters (9.8 ft) can be used here.
!
Note!
USB2.0 is compatible to USB1.1, i.e. communication is possible.
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