Hach ORBISPHERE 366 Series Basic User Manual page 10

Section 4 Installation
In accordance with safety standard EN 61010-1, it must be possible to disconnect the power supply of the
3660EX instrument in its immediate vicinity.
The installation of a 3660EX or 3662EX instrument should be performed exclusively by personnel specialized and
authorized to work on electrical installations, in accordance with relevant local regulations.
4.1 Installation diagrams
The ATEX certification for the 3662EX instrument covers only the hazardous area. The customer must verify if a
certificate of conformity is required for the entire installed system, including safety barrier, power supply cable,
and eventually the communication isolator, the 4/20 mA repeater and respective cables.
Figure 3 3660EX installation
1 Safe area
2 Hazardous area
3 0/4–20 mA intr. safe compliance 5 V
4 Sensor cable (32 515E.mm) 10+shield
5 Sensor head (31xxxE or GA2800 ATEX)
6 Optional external pressure sensor (32 570E.wxyz)
10 English
W A R N I N G
W A R N I N G
N O T I C E
7 Sensor cable (32 514E.mm) 4+shield
8 RS-232 or RS-485
9 0/4–20 mA compliance 12 V
10 Gas syst. Hi/Lo alarms
11 Power supply: 95–130 VAC 50/60 Hz;
207–253 VAC 50/60 Hz