User manual

6 Detailed descriptions of I/O modules | Communication module UR20-1COM-SAI-PRO
395Manual u-remote1432790000/08/12.2015
Communication module UR20-1COM-SAI-PRO (Order No. 2007430000)
Up to 15 subbus modules type SAI Active UniversalPro
can be connected to the u-remote station via the
UR20-1COM-SAI-PRO communication module. The subbus
modules can be placed in a IP67 surrounding. The distance
between the UR20 communication module and the last
connected subbus module should not exceed 50metres
(164ft). A maximum of three UR20-1COM-SAI-PRO modules
can be placed within a u-remote station.
The module electronics of the communication module sup-
ply the connected SAI subbus modules with 24VDC (max.
3A) from the input current path (I
IN
). The communication
status is indicated by two LEDs. The SAI subbus modules as
well as the UR20 modules are visible on the web server.
The rst subbus module is connected with its input (4-pole
plug M8 or M12) to the number 3 connector of the com-
munication module (see connection diagramm and pin as-
signment). The shielding is placed at the FE connections on
number 4 plug of the communication module and the body
of the subbus module.
The output of the last module of the subbus chain has
to be covered with a terminating resistor (Order No.
1955340000).
4
3
2
4
3
1
2
4
3
1
GW·SAI
FE
FE
FE
FE
Data +
GND
24VDC
Data –
2 4
31
1 +24 V DC
2 Data +
3 GND
4 Data –
Shield
Shield
Connection diagram UR20-1COM-SAI-PRO
Pin assignment 4-pole connector (male) on SAI-PRO subbus
UR20 SAI IN
Pin
Cable colour Function
3.1 2 brown Data+
3.2 3 green GND
3.3 1 white +24 VDC
3.4 4 yellow Data–
The subbus modules have to be connected
using shielded cables (e.g. Weidmüller Order
No. 198191xxxx)! The maximum cable length
depends on the subbus structure (seedocu-
mentation of the subbus modules).
Shielding has to be designed as described in
the chapter “Earthing and Shielding”.
Connectable subbus modules
SAI-AU M8 SB 8DI SAI-AU M12 SB 4AI
SAI-AU M8 SB 8DIO SAI-AU M12 SB 4AO
SAI-AU M8 SB 8DO 2A SAI-AU M12 SB 4PT100
SAI-AU M12 SB 8DI SAI-AU M12 SB 2CNT
SAI-AU M12 SB 8DIO SAI-AU M12 SB 4THERMO
SAI-AU M12 SB 8DO 2A
6.51 Communication module UR20-1COM-SAI-PRO