GASLAB Q2 AFTER DELIVERY AND AT THE PLACE OF USE
Information for general use
Rev. M / 73023639
66
GasLab Q2
5.4.2.
Cables (power supply / communication)
For the connection between GasLab Q2 and other instruments different control and signal cables
are suitable, the choice depends on the requirements at the place of use.
Cables and wires are standard products (not from the manufacturer) which are
necessary to operate the GasLab Q2.
It is recommended to disconnect the data cables from the power supply cable
.
Generally, the connection cables can be routed to 2 separate locations without additional ex-rated
junction boxes. The insulation must at least comply with flammability class 1. Use screened cables.
The screen on the connection cable must be connected in compliance with local regulations.
The connection box temperature may rise to 10°C
≙
18°F
≙
10K above the ambient
temperature. Cables must be suitable for this increase in the local ambient conditions.
La
température du boîtier de jonction peut monter jusqu’à
10°C
≙
18°F
≙
10K au-dessus de
la température ambiante. Les câbles doivent être adaptés à cette augmentation de la
température ambiante locale.
The connection terminals are suitable for conductor cross-sections from 0.25 mm²
≙
24 AWG to 2.5
mm²
≙
14 AWG. Signal cables require conductor cross-sections of
≥
0.25 mm²
≙
24 AWG. We
recommend signal cables with a conductor-to-conductor capacity of less than 120pF/m
≙
36.58 p
S
−
1
/ft and an inductance of less than 0.7
µ
H/m
≙
0.213
µΩ
s /ft.
The number of cores varies depending on the application, whereby the cores should be twisted into
pairs and screened jointly. The maximum cable length depends on the type of signal and must not
be exceeded.
A cable type of category 5 (Cat 5) is recommended for data communication links via Ethernet. See
also the next section.
Cable or cores pass through cable glands on the top of the device into the connection box.
All the electrical interfaces are housed here. The cables are connected to the connection board in
the connection box using the plugs at the edge of the board.
The relevant installation guidelines must be obeyed for routing the cables!