L. G. B. 55077 Instructions De Service page 9

terminal is electrically insulated
from the LGB-Bus. You can use
AC or DC to power your dis-
plays.
Attention! The voltage must not
exceed 20V AC or 24V DC.
3. On the other side of the display
module, there are four groups
(A-D) of three terminals each
("a," "b" and ground) (Fig. 1).
Here you can connect eight
lights, LEDs or other devices.
The ground terminals (center
terminals of each group) all are
interconnected.
Attention! The devices connect-
ed to each terminal must not draw
more than 1 amp.
FUNCTION OF THE MTS
DISPLAY MODULE
The display module is pro-
grammed to either four or eight
addresses. It "listens" to the LGB
Bus. When it receives a command
to one of
addresses, the corresponding ter-
minal is activated. Example: A
light illuminates or goes dark.
When the power is switched off
(Emergency Stop), the relay posi-
tions are saved in the internal
memory.
Hints:
- The MTS Display Module dis-
plays only commands that are
sent via the LGB Bus:
- If Switches are set by hand,
the MTS Display Module dis-
plays the new switch setting
only if a true feedback exists
via 12070 EPL Supplemen-
tary Switches and 55070 MTS
Feedback Interfaces.
- With the 55060 MTS Comput-
er Interface, you can trigger
contacts using your computer
mouse. This does not send a
command to the LGB Bus,
and the MTS Display Module
will not display this change. If,
for example, the contact sets a
track switch, the MTS Display
Module will display the result-
ing command.
Option 1: 4 addresses
When using four addresses, two
conditions each are displayed (for
example, "Track switch straight"
its programmed
and "Track switch diverging").
Both relays are electronically con-
nected, so that both show the lat-
est setting at the programmed
address (for example, setting of
track switch).
Option 2: 8 addresses
When using eight addresses, one
condition each is displayed (for
example, "Track occupied").
PROGRAMMING THE MTS
DISPLAY MODULE
There are are several options for
programming the MTS Display
Module. Factory pre-sets are:
Address block 1-8, initial condi-
tion: relay open.
Programming the addresses
Option 1: 4 addresses
Each display module is pro-
grammed to four consecutive
addresses, which are located in
an address block (1-4, 5-8, 9-12,
etc.) (Fig. 2) - similar to MTS
Switch Decoders. Each address
triggers two terminals (A, B, C,
D). When programming, set DIP
switch No. 7 to "OFF."
With this option, the display is as
follows:
Terminal A (a and b) 1st address of address block
Terminal B (a and b) 2nd address of address block
Terminal C (a and b) 3rd address of address block
Terminal D (a and b) 4th address of address block
Option 2: 8 addresses
When eight addresses are dis-
played, the addresses are located
in the programmed address block
(Fig. 2) and in the following
address block. Each address trig-
gers one terminal. When pro-
gramming, set DIP switch No. 7 to
"ON."
With this option, the display is as
follows:
Terminal Aa 1st address of address block 1
Terminal Ab 2nd address of address block 1
Terminal Ba 3rd address of address block 1
Terminal Bb 4th address of address block 1
Terminal Ca 1st address of address block 2
Terminal Cb 2nd address of address block 2
Terminal Da 3rd address of address block 2
Terminal Db 4th address of address block 2
Programming steps:
1. Disconnect the cable (phone-
style connector) to the LGB
Bus.
9