1.4.2 Hazardous area wiring connections
Before installing and using the
HygroPro
in a hazardous
(classified) area, be sure to read and understand all
applicable reference materials. This includes:
• all
EU
or
North American Standards and Directives
(see Table 3 on page 7 and Table 4 on page 7)
• all local safety procedures and practices
• the FM schematic drawing (see Figure 5 on page 6)
• this user’s manual
Note:
It is the installer’s responsibility to follow all applicable
standards and procedures.
WARNING!
The procedures in this section must be
performed only by trained technicians who
have the necessary skills and qualifications.
Associated apparatus
Note 3
RS485 comm
Note 4
Associated apparatus
Note 3
Loop-power device
Note 4
Notes:
1. Installation shall be in accordance with the National Electrical
Code (ANSI/NFPA 70) or part one of the Canadian Electrical Code
(C221), as applicable.
2. The subject equipment is FM approved, and FM approved for
Canada for the following hazardous (classified) locations and
protection methods:
Intrinsically safe, class I, II, III, division 1, group ABCDEFG, T4
T Ambient: -40°C to 60°C
Enclosure: IP 67
3. Galvanically isolated FM approved (US) or Canadian certified
(for Canada) associated apparatus installed in accordance
with the manufacturer’s instructions.
4. Equipment to which associated apparatus is connected shall not
use or generate in excess of 250V.
5. Maintain the following relationship between intrinsic aafety (entity)
parameters of HygroPro and associated apparatus:
HygroPro Vmax ≥ associated apparatus Voc
HygroPro Imax ≥ associated apparatus Isc
HygroPro Pi ≥ associated apparatus Po
HygroPro Ci + Ccable ≤ associated apparatus Ca
HygroPro Li + Lcable ≤ associated apparatus La
Hazardous or non-hazardous location
class I, division 1, group ABCD
class II, division 1, group EFG
class III, division 1
Non-hazardous location
HygroPro
Loop terminal
Safety entity parameters:
Vmax = 28 V
Imax = 93.3 mA
Pi = 0.653 W
Ci = 0
Li = 62 µH
RS485 comm terminal safety
entity parameters:
Vmax = 3.72 V
Imax = 228 mA
Pi = 212 mW
Ci = 0
Li = 62 µH
blue
brown
black
white
Figure 5: FM schematic (ref. dwg #752-262)
6
