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The Sapling Company, Inc.
1633 Republic Road
Huntingdon Valley, PA 19006
USA
P. (+1) 215.322.6063
F. (+1) 215.322.8498
www.sapling-inc.com
Outputs - Backup Mode
21 20 19 18
27 26 25 24 23 22
18 19
Primary Master Clock
18 19
Backup Master Clock
21 20
24 23 22
25 26 27
To RS485 or 2-Wire Digital
Clock System
RS485 Output B
RS485 Output A
When used as a backup clock,
the NTP Master
Clock accepts RS485 Data from another NTP or
SMA Master Clock and passes them through its
clock-sync relay switches. If data is not received for
a period of time from the Primary Master Clock, the
relay switches shift to sending RS485 data from its
own data ports.
In this configuration, the backup master clock may
only be used as a backup for RS485 and 2-Wire
Digital Clock systems.
The backup feature must be enabled in the
Web Interface for the clock to function in this
manner. Refer to the section “Web Interface -
Synchronization” for activation instructions.
In an RS485 System,
Output A attaches to Blue,
while Output B attaches to Red.
In a 2-Wire Digital System,
Output A attaches to
Converter Box Input A, while Output B attaches to
Converter Box Input B.