OLCT 60
FIXED POINTGAS MONITOR
USER MANUAL
12
NPO60GB
Revision F.2
2.6
Connecting cable
The detector shall be connected to the controller with a 3-wire shielded cable. Core size depends
on the specific requirements of the installation, the distance and type of detector (see table
below).
Type of detector
Type of sensor
Maximum length (km)
depending on the core size
Maximum
load
resistance (
Ω
)
0..5mm²
(AWG
20)
0.9 mm²
(AWG
18)
1.5 mm ²
(AWG
15)
Explosimeter
Catalytic
0.55
1.0
1.7
250
Explosimeter
Infrared (GD10P)
0.40
0.80
1.4
250
Toximeter
Electrochemical
1.0
1.8
3.0
250
Oxygen detector
Electrochemical
1.0
1.8
3.0
250
Freon
Semiconductor
0.55
1.0
1.7
250
Table 2: Maximum distance cable (with 24 Vcc at controller terminals)
The cable must be shielded to reduce the influence of electrical and radio-frequency interference.
A cable such as AFNOR M 87-202-01-IT-15-EG-FA (Nexans) may be used. It shall be selected
according to the type of detector and in accordance with the table shown hereinabove. Here are
some more examples of suitable cables:
Safe area: CNOMO FRN05 VC4V5-F
ATEX zone: GEVELYON (U 1000RHC1)
ATEX zone: GVCSTV RH (U 1000)
ATEX zone: xx-xx-09/15- EG-SF or EG-FA or EG-PF (U 300 compatible with M87202).
The maximum permissible length will depend on the cross-section of the cable conductors (see
table) and on the minimum admissible supply voltage at the detector terminals.
2.7
Cable connection
2.7.1
Turn off the line
On the controller:
1.
Inhibit any alarms to prevent false alarms during operation.
2.
Switch off the power supply to the detector.
Summary of Contents for OLCT 60
Page 1: ...NPO60GB Revision F 2 OLCT 60 FIXED POINTGAS MONITOR USER MANUAL ...
Page 44: ...OLCT 60 FIXED POINTGAS MONITOR USER MANUAL 38 NPO60GB Revision F 2 ...
Page 50: ...OLCT 60 FIXED POINTGAS MONITOR USER MANUAL 44 NPO60GB Revision F 2 ...
Page 52: ...OLCT 60 FIXED POINTGAS MONITOR USER MANUAL 46 NPO60GB Revision F 2 ...
Page 66: ...OLCT 60 FIXED POINTGAS MONITOR USER MANUAL 60 NPO60GB Revision F 2 ...
Page 67: ...OLCT 60 FIXED POINTGAS MONITOR USER MANUAL NPO60GB Revision F 2 61 ...