ALPHA Serial Clock Manual
12
In a network with a PC that is connected to Alpha clocks and Alpha signs, all
the clocks must be set to slave mode.
Table 3: Networking Alpha serial clocks
(Example 3 — A network of clocks attached to a PC)
Unlike the previous all-clock network, in this example, a PC is connected to the network. All the clocks on the network
must be set to slave mode. Also, the last clock on the network must be terminated.
Item Part # Description
A 1088-9107
End-of-line (EOL) terminator. (An EOL must be plugged into the left—as you face the
back of the clock—RJ11 phone jack.)
B — Ferrite (ferrite end towards sign)
C
1088-8624 8 foot, 4-conductor RS485 cable
1088-8636 1 foot, 4-conductor RS485 cable
D 4331-0602 Modular Network Adapter
E 1088-8000 RS485 cable
F 1088-1111 Converter Box III
G 1088-8634 10 foot, 9 pin-to-9 pin, type “A9” RS232 cable
H — serial port DB25-to-DB9 RS232 adapter (may be required by your computer)