TM_s-MEXT_ME28relC_00_12_19_EN
Technical manual
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
121
20.10
SHARED USER TERMINAL
The shared user terminal (address 32) is managed by the application as follows:
•
Usually, it displays the information regarding the unit selected by the user by pressing
[ESC]
and
[ALARM]
simultaneously. Whenever this is done the terminal
switches onto the upper unit address.
•
In case of maintenance alarm or signal on any of the units connected to the LAN network, the user terminal automatically switches onto the alarm or signal unit,
in order to allow proper signalling.
Physically, the shared terminal may be connected to any of the network boards. Moreover, it may be connected both on the unit (panel terminal) or in remote position (wall
terminal).
20.10.1
Connecting the remote keyboard
As a standard, there is only the on-board keyboard, directly connected to the J10 connector.
It is possible to connect a remote keyboard to the unit and it is possible to choose from different configurations.
Figure 20-10:
Basic scheme to connect a remote keyboard
20.10.2
“T” shunt
This is a shunt with phone connectors that is used in both the local network (LAN) and global network.
The two jumpers J14 and J15 must short circuit pins 1 and 2.
There is also a terminal board. The meanings of the various terminals are explained below.
1.
Image and wiring diagram
of a T-shunt.
2.
Meaning of the terminal board
Screw terminal
Function
0
Earth (shielded cable sheath)
1
+VRL=30V
2
GND
3
Rx-/Tx-
4
Rx+/Tx+
5
GND
6
+VRL=30V
Unit
