Sensor Input Option Mcb; Relay Output; Additional Connections; Dc Bus Connection - Danfoss FC 102 Design Manual

Electrical Installation

6.5.8 Relay Output

Relay 1
•
Terminal 01: common
•
Terminal 02: normal open 240 V AC
•
Terminal 03: normal closed 240 V AC
Relay 2 (Not FC 301)
•
Terminal 04: common
•
Terminal 05: normal open 400 V AC
•
Terminal 06: normal closed 240 V AC
Relay 1 and relay 2 are programmed in 5-40 Function Relay,
5-41 On Delay, Relay, and 5-42 Off Delay, Relay.
6 6
Additional relay outputs by using Relay Option Module
MCB 105.
relay1
relay2
Illustration 6.59 Relay Outputs 1 and 2

6.6 Additional Connections

6.6.1 DC Bus Connection

The DC bus terminal is used for DC back-up, with the
intermediate circuit being supplied from an external
source. It uses terminals 88 and 89.
For further information, contact Danfoss.
114
Design Guide
03
240Vac, 2A
02
01
06
240Vac, 2A
05
400Vac, 2A
04
Danfoss A/S © Rev. 06/2014 All rights reserved.

6.6.2 Load Sharing

Use terminals 88 and 89 for load sharing.
The connection cable must be screened and the max.
length from the frequency converter to the DC bar is
limited to 25 m (82 ft).
Load sharing enables linking of the DC intermediate
circuits of several frequency converters.
WARNING
Note that voltages up to 1099 V DC may occur on the
terminals.
Load Sharing calls for extra equipment and safety
considerations. For further information, see load sharing
Instructions.
WARNING
Note that mains disconnect may not isolate the
frequency converter due to DC-link connection

6.6.3 Installation of Brake Cable

The connection cable to the brake resistor must be
screened and the max. length from the frequency
converter to the DC bar is limited to 25 m (82 ft).
1. Connect the screen by means of cable clamps to
the conductive back plate on the frequency
converter and to the metal cabinet of the brake
resistor.
2. Size the brake cable cross-section to match the
brake torque.
Terminals 81 and 82 are brake resistor terminals.
See Brake instructions for more information about safe
installation.
NOTICE
If a short circuit in the brake IGBT occurs, prevent power
dissipation in the brake resistor by using a mains switch
or contactor to disconnect the mains for the frequency
converter. Only the frequency converter should control
the contactor.
CAUTION
Note that voltages up to 1099 V DC, depending on the
supply voltage, may occur on the terminals.
MG11BC02