SELENA Multifunctional LED Clock USER MANUAL V32D
KERA TECHNOLOGIES INC. 2013 www.ledclocks.com
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4. After the frequency selection has been made, the functions Fn 31 and Fn 11 may be disabled or left enabled.
IMPORTANT: The Sync signal Frequency programming affects the current Stopwatch/Timer/Counter memory.
Therefore, if timers or counters are also being used, DISABLE the function Fn11 and renew the programmed
starting time / count after finishing the zone offset programming. If the timer, not the counter is to be used,
also disable the function Fn31.
NOTE1: It is possible to monitor the presence of the Sync signal detected by the Slave Clock by enabling the function
Fn12. When Fn12 is enabled, the colon in the time clock display will flash when the sync signal is present.
NOTE2: In systems with the WIRED Impulse Sync transmitted through a separate Cable, High Voltage or Low Voltage, the
operation is similar except the SIGNAL Frequency selection is NOT NECESSARY and the function Fn 13 must be
also enabled. The sync signal should then be connected to a pair of designated terminals on the back panel of the
clock.
MASTER—SLAVE Sync System with Serial Communication
( Optional Feature )
Large System Clock installations may be synchronized by linking them together in a serial communication network using a
“Twisted Pair“ 2-conductor cable, power line serial communication, Ethernet/Internet or RF ( radio ) communication.
Slave Clocks receive the data transmitted by the Master Clock ( SELENA or other ) or a PC and interpret that data to
synchronize themselves with the Master.
In the simplest system the basic configurations for the Master-Slave operation are as follows:
1. SLAVE for TIME SYNC only
( for all protocols )
The slaves will interpret the Time data from the Master and will set its own internal clock “in sync” with it.
In these configurations, even if the data connection is lost, the Slaves will continue accurate timekeeping based on
the latest, successful sync data reception.
A. To use the standard SELENA Time Sync communication protocol enable the appropriate functions as
listed in the Configuration Table below.
B. To use the ASCII Time Code Format “0,1,2 or 3” or Lathem protocol enable both Fn 34 and Fn 46 and
select the sync format by enabling Fn11 and Fn12 as required.
2. SLAVE as the DISPLAY REPEATER form the MASTER clock screen ( This option is allowed only when the
SELENA Time Sync protocol is used ). See the function Fn 33.
The Slave will repeat all the display data as transmitted by the Master.
In this configuration the Slave will not be able to perform any other display functions except when it is put in the
programming mode via the Remote Control. In case of a loss of communication, the slave display may “freeze” at
the last received screen.
The function Fn33 may be used in Special Applications as the Master display contents repeater for broadcasting to the slaves.
This may work ONLY with the SELENA Time Sync protocol.
When other communication protocols are enabled, the clock may automatically DISABLE the Fn 33 Display Repeater Mode.
3. EXTRA DATA TRANSMISSION from the MASTER or from designated Slaves
( This option is allowed only when the SELENA Time Sync protocol is used ).
See the functions Fn 81, 82, 83.
The Master ( or a PC ) or in some cases the selected Slaves or Repeater slaves, may be setup to transmit special
data with selected parameters or commands. For instance the temperature measurement results, the relay control
or the timer setup data may be sent from the Master or the repeater to some slaves that are setup to receive such
data.
Appropriate control software ( and hardware ) and functions must be installed and enabled to use this configuration.
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