Electrical Installation
NOTICE!
POTENTIAL EQUALIZATION
Risk of electrical interference, when the ground potential between the adjustable frequency drive and the control
system is different. Install equalizing cables between the system components. Recommended cable cross-section: AWG 6
[16 mm
2
].
4
4
4.4 Wiring Schematic
Figure 4.1 Basic Wiring Schematic
A=Analog, D=Digital
*Terminal 37 (optional) is used for Safe Torque Off (STO). For installation instructions, refer to the VLT
Instruction Manual. Terminal 37 is not included in FC 301 (except enclosure type A1). Relay 2 and terminal 29 have no
function in FC 301.
**Do not connect cable shield.
14
Instruction Manual
91 (L1)
3-phase
92 (L2)
power
93 (L3)
input
95
PE
DC bus
88 (-)
89 (+)
50 (+10 V OUT)
+10 V DC
S201
0/-10 V DC-
53 (A IN)
+10 V DC
0/4-20 mA
S202
0/-10 V DC -
54 (A IN)
+10 V DC
0/4-20 mA
55 (COM A IN)
12 (+24 V OUT)
13 (+24 V OUT)
18 (D IN)
19 (D IN)
20 (COM D IN)
27
(D IN/OUT)
*
29
(D IN/OUT)
32 (D IN)
33 (D IN)
*
37 (D IN)
Danfoss A/S © Rev. 09/2014 All rights reserved.
Switch Mode
Power Supply
10 V DC
24 V DC
15 mA 130/200 mA
+
-
+
-
ON=0/4-20 mA
OFF=0/-10 V DC -
+10 V DC
P 5-00
24 V (NPN)
0 V (PNP)
24 V (NPN)
0 V (PNP)
24 V (NPN)
S801
0 V (PNP)
ON=Terminated
24 V
OFF=Open
0 V
5V
24 V (NPN)
0 V (PNP)
24 V
S801
0 V
RS-485
Interface
24 V (NPN)
0 V (PNP)
24 V (NPN)
0 V (PNP)
(U) 96
(V) 97
(W) 98
(PE) 99
Motor
Brake
(R+) 82
resistor
(R-) 81
relay1
03
240 V AC, 2 A
02
01
relay2
*
06
240 V AC, 2 A
05
400 V AC, 2 A
04
Analog Output
(COM A OUT) 39
0/4-20 mA
(A OUT) 42
0 V
RS-485
(N RS-485) 69
: Chassis
(P RS-485) 68
: Ground
**
(COM RS-485) 61
: PE
: Ground 1
: Ground 2
®
Safe Torque Off
MG33AP22
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