Yokogawa RotaMASS 3-Series User Manual
Page 81
9. EXPLOSION PrOTECTEd TyPE INSTrUMENTS
9-5
IM 01R04B05-00E-E 3rd edition July 30, 2010 -00
all Rights Reserved. Copyright © 2005, Rota Yokogawa
Remote type RCCF31 with RCCS3
WARNING
1.
Ex type RCCF31 and RCCS3 must be connected to the suitable IS earthing system
(see installation diagram). Converter and detector case must have connection to the potential
equalisation facility.
2.
use the certified cable glands, suitable for the conditions of use.
3.
Please confirm that the ground terminal (inside the terminal enclosure) is firmly connected by
means of a clip-on eye-let.
4.
Ex-e terminals for power supply and I/o-lines are designed for cables with cross section of 0.08 mm²
(aWG 28) to 2.5 mm² (aWG22). the strip length must be 5 to 6 mm (0.2 to 0.24 in).
5.
For EMC technical reasons the case of the detector is connected to the case of the converter via
the shielding of the interconnecting cable.
Cable glands for power- and I/o-cables :
RCCF31-xxx M : Ex e types are enclosed. these cable glands can also be used for “dust application” (D).
use atEX-certified Ex d cable glands for Ex d condition.
RCCF31-xxx a : no cable glands are enclosed. use the atEX-certified cable glands, suitable for the
conditions of use (Ex de or Ex d or dust application)
For “dust application” (D) use cable glands with minimum IP67 protection !
Cable glands for detector connection terminal :
RCCF31-xxx M : Cable glands are fitted in the concerning thread. this cable gland can also be used
for “dust application” (D).
RCCF31-xxx a : Cable glands are enclosed. this cable gland can also be used for “dust application” (D).
Installation diagram /KF4 :
the inner shields (shields of the cable pairs) are connected together to CoM –terminal on converter side.
the outer shield of the cable is connected on both sides to the cases by cable gland.
[Remote type]
Terminator
RCCF31
(Converter)
FFout+
FFout–
+
–
+
–
Field Instrument
Field Instrument
Safe Area
Hazardous Area
Terminator
Saftey Barrier
RCCS3
(Detector)
D+
D-
S1+
S1-
S2+
S2-
TP1
TP2
TP3
COM
L/+
N/–
Power supply
AC or DC
D+
D-
S1+
S1-
S2+
S2-
TP1
TP2
TP3
COM
Remote Cable
RCCY03
Outer shield
Connected shields
of cable pairs
to COM-terminal
F09106.EPS