Yokogawa RotaMASS 3-Series - Manual (Page 86)

9. EXPLOSION PrOTECTEd TyPE INSTrUMENTS
9-10 IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
9.2.2 Installation
Integral type RCCt3 :
L/+
N/-
G
Power supply
I/O control
Hazardous area Safe area
I/O
Rotamass RCCT3
F91.EPS
Terminal Box
NOTE
temperature classification :the remote converter RCCF31 has a t6 temperature class rating for operation
at ambient temperature up to +50°C / +122°F:
RCCS30 to RCCS33
without insulation
RCCS30 to RCCS33
with factory insulation
temp.
class
Max. ambient
temperature
Max. process
temperature
Max. ambient
temperature
Max. process
temperature
t6 50°C / 122°F 60°C / 140°F 60°C / 140°F 60°C / 140°F
t5 50°C / 122°F 80°C / 176°F 80°C / 176°F 90°C / 194°F
t4
80°C / 176°F
50°C / 122°F 100°C / 212°F
120°C / 248°F
80°C / 176°F 130°C / 266°F
t3 80°C / 176°F 150°C / 302°F 80°C / 176°F 150°C / 302°F
t2 80°C / 176°F 150°C / 302°F 80°C / 176°F 150°C / 302°F
RCCS34 to RCCS39/XR
without insulation
RCCS34 to RCCS39/XR
with factory insulation
RCCt34 to RCCt39/XR
temp.
class
Max. ambient
temperature
Max. process
temperature
Max. ambient
temperature
Max. process
temperature
Max. ambient
temperature
Max. process
temperature
t6 40°C / 104°F 40°C / 104°F 65°C / 149°C 65°C / 149°F 50°C / 122°F 65°C / 149°C
t5 55°C / 131°F 55°C / 131°F 75°C / 167°F 75°C / 167°F 50°C / 122°F 80°C / 176°F
t4
80°C / 176°F
40°C / 104°F 100°C / 212°F
120°C / 248°F
70°C / 158°F 115°C / 239°F 50°C / 122°F 115°C / 239°F
t3
80°C / 176°F
40°C / 104°F 160°C / 320°F
180°C / 356°F
70°C / 158°F 180°C / 356°F 50°C / 122°F 150°C / 302°F
t2 80°C / 176°F 220°C / 428°F 65°C /149°F 275°C / 527°F
t1 45°C / 113°F 350°C / 662°F
For customer insulation of RCCS34 to 39/IR the following must be regarded :
the table "with factory insulation" is calculated with 80 mm insulation and k-factor = 0.4 W/m 2 K.
If your insulation data are worse than these use table "without insulation" !