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750-640 [RTC Module]
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WAGO-I/O-SYSTEM
750
I/O-Modules
2 I/O Modules
2.1 Special Modules
2.1.1 750-640 [RTC Module]
Real Time Clock Module
2.1.1.1 View
1
5
2
6
3
7
4
8
13
14
C
D
B
A
750-640
Clock
V_Ant
-out
V_Ant
+in
V_Ant
-in
V_Ant
+out
Signal
DCF77
24 V out
24 V in
Power jumper contacts
Data contacts
Shield
Ground
Fig. 2.1.1-1: View
g064000e
2.1.1.2 Description
The RTC module 750-640 provides the higher-level control system with the
actual time. The time continues to run in the event of a power failure. Once the
module is switched on, about one hour is required for the integrated backup
capacitor to be fully charged.
When an external antenna is connected, the clock can be set using the time
signal from DCF77, WWVB or MSF. The antenna can be supplied directly via
the module. Connecting an external antenna to operate the RTC module is not
absolutely necessary.
With its 32 channels, the integrated time switch clock function makes it easier
for the control unit to process time-triggered actions. The module also counts
the power-on time of the 32 channels.
An external antenna is connected to both V_ANT+ out and V_ANT- out as
well as to the clock.
Supplying the antenna is done via the V_ANT+ in and V_ANT- in terminals.
Synchronizing the clock is done at the clock input using the time signal from
DCF77 or WWVB. The module is set by default to receive the DCF77 signal.