Specifications

October 8, 2003 Networking Alpha Signs (9700-0112C)
58 Appendix
Alpha Serial Clocks
The Alpha Serial Clock displays the time in either 12-hour or 24-hour mode using a 4-inch LED display. It can
be used all by itself or networked with other Alpha clocks or signs. In a network, a clock behaves like an Alpha
sign in that it is used to synchronize all other clocks. In this case, the time is synchronized instead of a message.
Also, just like an Alpha sign, a clock must be terminated when it is the last device on a network.
Used alone, an Alpha Serial Clock should be set to Master Mode. In a network composed of all Alpha Serial
Clocks, one clock should be set to Master Mode and the other clocks set to Slave Mode. In a network with a PC that
is connected to Alpha clocks and signs, all the clocks should be set to Slave Mode. For more information on using
the Alpha Serial Clock, see ALPHA Serial Clock for Networked & Synchronized Timing Applications (pn 9703-
3006).
Network of all clocks
Item Part # Description
A 1088-9107
End-of-line (EOL) terminator (Must be plugged into the left—as you
face the back of the clock—RJ11 port.)
B — Ferrite (ferrite end towards clock)
C
1088-8624 8-foot RS485 cable
1088-8636 1-foot RS485 cable
D 4331-0602 Modular Network Adapter
E
1088-8002 1000-foot RS485 shielded plenum cable
7122-0283 100-foot RS485 shielded plenum cable
7122-0284 100-foot RS485 outdoor-rated shielded plenum cable
ALPHA
HOUR MINUTE
A
A
To right port
To right port
To right port
B
C
D
E
ALPHA
HOUR MINUTE
ALPHA
HOUR MINUTE
ALPHA
HOUR MINUTE
Alpha Serial Clocks
To right port
B
CD