M
M
F
F
W
W
-
-
Z
Z
D
D
-
-
B
B
A
A
-
-
U
U
K
K
-
-
0
0
0
0
6
6
P
P
a
a
g
g
e
e
9
9
o
o
f
f
2
2
4
4
A system from the MFW product family
3.5 Connections and indicator lamps
Figure 1: Master module with IEC interface
6
Indicator light “Operating condition”
Permanent light - No error
Off
- no supply voltage or module defect
flashing
- Error (
section)
1
Protocol interface
(only for modules with serial protocol interface)
2
SDP interface
3
Socket for the prepared Ethernet interface
(only for master module with IEC interface)
4
CAN bus interface
(for connecting the expansion modules)
5
Connecting socket for the DCF77 active antenna
(only for master module with IEC interface)
7 Status
LEDs
LED1 TX for data traffic on the two wire (telegram transmission)
LED2 RX for data traffic on the two wire (telegram receiving)
<=>
“External module” LED flashes if an expansion module is connected.
<~>
LED “DCF77 module”
Flashing once per second
- DCF77 reception
Irregular flashing
- bad DCF77 reception
Off
- no DCF77 reception or no DCF77 receiver connected
8
COM-LED for the serial interface flashes when data is sent to or received by the interface.
