Yokogawa RotaMASS 3-Series User Manual

Page 203

9. EXplOSION prOTECTEd TYpE INSTrUMENTS

9-11

IM 01R04B04-00E-E 8th edition March 01, 2011 -00

Remote field-mount type RCCF31 with RCCS3 :

L/+

N/-

Power supply

I/O control

Hazardous area

Safe area

I/O

RCCF31

RCCS3

D+
D-
S1+

S1-

S2+

S2-

TP1

TP2

TP3

D+
D-
S1+

S1-

S2+

S2-

TP1

TP2

TP3
COM

Exclusive remote cable RCCY03

F92.EPS

Terminal Box

- The flowmeter must be connected to the potential equalization system. For remote

type converter and detector case must have connection to the potential equalisation

facility.

- For remote type at ambient temperature up to 60°C / 140°F use remote cable RCCY031 or RCCY032.
- For remote type at ambient temperature up to 80°C / 176°F use remote cable RCCY033.
- Maximum length of remote cable is 50 m/164 ft.
- Specified maximum ambient temperature of cables (power supply-, I/O- and remote cable) must be
20°C / 41°F above maximum ambient temperature of flowmeter.
- For AC-version maximum power supply is 250 V AC.
- Install according National Electrical Code. Intrinsically safe circuits must be installed according NEC ANSI

/ NPFA 70 amd ISA RP 12.6.

- Use certified XP (explosion proof) cable glands for power supply and I/O.
- Please confirm that the ground terminal (inside the terminal enclosure) is firmly connected by means of a

clip-on eye-let.

- For EMC technical reasons the case of the detector is connected to the case of the converter via the

shielding of the interconnecting cable.

CAUTION

Installation of separate intrinsic safe ground for remote type rCCS3 with rCCF31
(see Control drawing 8300027) :
- Remove the stopping plug on detector connecting side and replace it by a dust proofed cable gland.
- Open the cover on detector connecting side of RCCF31.
- Remove the cable between COM- terminal and the ground screw.
- Put the intrinsic safe ground cable through the new installed cable gland.
- Connect the IS-ground cable to the COM- terminal.
- Install the remote cable between detector RCCS3 and converter RCCF31 as shown in this chapter.