Implementation Of An Ac 31 System; Assembly Conditions; Input/Output Cabling - ABB AC 31 Technical Manual

1. Implementation of an AC 31 system

1.1. Assembly conditions

1.2. Input/output cabling

ABB Control - AC 31
1SBC 260400 R1001-b 06.99
Installation
This chapter presents the cabling, product by product, the main implementation rules and the
addressing rules.
The AC 31 product range has been conceived for operation in extreme industrial
environments. The correct operation of these products is only ensured if a certain number of
rules are adhered to. These rules concern the assembly conditions, the input / output cabling
principle, the earthing, the connection of the CS 31 bus and the different types of power
supply.
The products of the AC 31 range may be mounted on two types of fixation. They may be
installed vertically or horizontally:
- either on a DIN rail (35 mm) by using the support lock.
- or by a screw (4 mm diameter M4), the fixing holes placed at the base of the units
enabling plate mounting.
For a cabinet assembly:
operating temperature from 0 to 55°C, envisage sufficient free volume around the units to
allow the heat to dissipate correctly. It is recommended that the cabinet be fitted with a
ventilation system.
Warning: avoid placing heat generating devices next to the products (transformers, mains,
power contactors, ...).
All electrical connections are effectuated through removable terminal blocks with an
acceptable wire section equal to 2.5 mm
The tightening torque, for reference, is equal to 0.8 Nm.
Use rigid wires or multi-conductor wires AWG 18 (0.96 mm
inputs and rigid wires or multi-conductor wires AWG 14 (1.95 mm
Certain precautions should be taken to reduce installation disturbances from the surroundings.
The cables carrying low voltage signals should not be placed in the same sleeve as the power
cables.
One must distinguish between two types of signals:
- 230 V a.c. power supply
- analog signals (use shielded cables) and low voltage (24 V d.c. ).
2.
2
) to AWG 14 (1.95 mm
2
) for the outputs.
2
) for the
Page 4-3