3. Introduction to Extended Relay Card MCB 113
3.1. Introduction to Extended Relay Card MCB 113
The VLT Extended Relay Card MCB 113 is constructed as a standard C1 option for the Danfoss VLT AutomationDrive FC 300 and is automatically detected
after mounting.
The MCB 113 adds 7 digital inputs, 2 analog outputs and 4 SPDT relays to the standard I/O of the frequency converter which makes it possible to comply
with the German NAMUR NE37 recommendations.
3.1.1. Connection Schematic
Below the electrical connections for the Extended Relay Card MCB 113 are shown:
X46/
DI
7
+
+
-
-
+
+
+
-
-
-
-
-
+
+
DI
1
DI
2
DI
3
DI
4
DI
5
DI
6
3
2
1
8
7
6
5
4
11
10
9
13
12
14
X58/
3
+
-
E
xt. 2
4
V
D
C
2
1
4
+
-
AO
4
3
1
+
-
AO
3
2
X45/
13
246
579
81
0
12
11
R
el
ay
4
R
el
ay
5
R
el
ay
6
X4
7/
Re
la
y 3
.
.
.
.
.
.
.
.
130BA687.10
3.1.2. Galvanic Isolation
MCB 113 can be connected to an external 24 V on X58/ in order to ensure galvanic isolation between the VLT AutomationDrive and the option card. If
galvanic isolation is not needed, the option card can be supplied through internal 24 V from the frequency converter - available on X58/ provided that
internal supply is specified in par. 14-80 ([0] No).
FC 300 Extended Relay Card Operating In-
structions
3. Introduction to Extended Relay Card MCB
113
MI.33.G2.02 - VLT
®
is a registered Danfoss trademark
7
3
