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The shield (screen) is directly connected to the DIN rail. A capacitive
connection is made automatically when the module is snapped onto the DIN
rail.
The status of the antenna input signal is indicated with a green LED.
An optocoupler is used for electrical isolation between the bus and the field
side.
Any configuration of the specialty modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.
The field side supply voltage of 0 V and 24 V to downstream I/O modules is
derived from adjacent I/O modules or from a supply module. The supply
voltage for the field side is made automatically through the individual I/O
modules by means of power jumper contacts.
Warning
The maximum current of the internal power jumper contacts is 10 A. When
configuring the system it is important not to exceed the maximum/sum
current. However, if such a case should occur, another supply module must
be added.
The RTC module 750-640 can be used with all couplers / controllers of the
WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324
and –327).
2.1.1.3
Display Elements
A
Fig. 2.1.1-2:
Display Elements
g063002x
WAGO-I/O-SYSTEM 750
I/O-Modules
LED
Description State
13 14
A
C
Antenna
B
D
green
signal
750-640 [RTC Module]
Display Elements
Function
off
No antenna signal
Fast blinking
No or faulty antenna signal
Blinking with
Antenna signal is present, but not
1 Hz
yet a correct telegram received
Antenna signal receiver is error
on
free
• 9
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