Endress+Hauser gammapilot FTG 671, Руководство по эксплуатации

Страница: 23 / 64

DG 57 detector wiring The wiring for the standard version of the DG 57 detector [EEx ib] is shown in Fig. 2.13.
•
We recommend the use of standard 2-core installation cable, max. 25
Ω
per
core.
•
Use shielded cable where electromagnetic interference is to be expected.
The [EExd]/ATEX II 2 G, [EEx de]/ATEX II 2 G or ATEX II 2 D detector versions are
connected in the same way - here the protective measures for the wiring, e.g. conduits,
are to be observed. Observe the associated Safety Instructions (XA 057F-A for
ATEX II 2 G; XA 112F-A for ATEX II 2 D).
Detector DG 57 Hxxxxx
or Vxxxxx
(EEx d version) The EEx d version of the DG 57 detector is supplied with cable entries NPT
1
/
2
", M20x1.5
or G
1
/
2
". For Connection of the detector DG 57-H with connection housing of the type
of protection "flameproof enclosure" the customer must supply suitable cable glands
(ip65) or conduits and wire to explosion-proof standards in accordance with EN 50018,
Section 12.1 and 12.2. Unused cable entries must be sealed to IP 65 in accordance with
EN 50 018, Section 12.5. Type of protection IP65 must be obtained. For connection of
the detector DG 57-V... with connection housing of the type of protection "flameproof
enclosure" the supplied cable gland Shimada SCX-16B Exd IIC must be used.
After the cable has been connected, screw the compartment lid down as far as possible
and lock with the safety claws.
Do not unscrew the Allen screws which hold the protective steel tube and detector head
together. Removing these screws will destroy the explosion protection of the detector
electronics!
DG 17/DG 27 detector
wiring The DG 17/DG 27 Geiger-Müller counters are supplied ready wired (3m cable) at the
detector end. They must be connected to the FTG 671 as shown in Fig. 2.14.
BA082D15
Fig. 2.13:
Connecting diagram for DG 57
(PCM signal)
BA082E16
Safe area Safe area
Rmax = 25
Ω
terminal box
provided by customer
Fig. 2.14:
Connecting diagram for
DG 17/DG 27 (PFM signal)
Gammapilot FTG 671 Chapter 2: Installation
21