Filter
Top Products
LTRx-512 Installation and User’s Guide
1
Welcome
Thank you for purchasing your new MASTER CLOCK. You can use your new Master to ring bells or turn on
circuits for up to 99 seconds, as well as to synchronize the time on secondary wall clocks or devices.
This manual covers 3 models of MASTER clocks: the LTR4-512, the LTR8-512 and the LTR8-512M
LTR4-512 LTR8-512 LTR8-512M
System Clock
Correction
1 correction type
running, plus RS485
correction
Up to 2 like or dissimilar
correction types running
simultaneously, plus RS485
correction
Up to 2 like or dissimilar
correction types running
simultaneously, plus
RS485 correction
Bell Circuits 4 with no clock
correction
2 with 1 clock
correction
8 with no clock correction
6 with 1 clock correction
4 with 2 clock correction
8 with no clock correction
6 with 1 clock correction
4 with 2 clock correction
Certifications UL, cUL,
FCC
UL, cUL,
FCC, DOC (internal modem
option)
UL, cUL,
FCC, DOC (internal
modem)
PC Interface
Software
None RS-232, RS-485,
Ethernet (requires TXTOSER
+ Cable)
RS-232, RS-485,
Modem , Ethernet
(requires TXTOSER +
Cable)
Atomic clock
synchronization
Yes. Requires LTR-GPS Yes. Requires LTR-GPS or
MasterLink software
Yes. Requires LTR-GPS or
MasterLink software
If your Master has 4 lights on the front panel, then you have the model LTR4-512
If your Master has 8 lights at the left of the front panel, then you have the model LTR8-512. If the TR
light at the keypad is lit, then you have the model LTR8-512M
CLK 1
1 2 3 4
cancel enter
1
2
3
4
5
6
7
8
9
0
*
#
SD
TR
RD
CD
CLK 2 CLK 1
1 2 3 4
5 6 7 8
cancel enter
1
2
3
4
5
6
7
8
9
0
*
#