7
X54-201L/SR
INSTALLATION DRAWING
USING I.S. BARRIERS OR
EXPL. PROOF CONDUIT
DRAWING NUMBER
X54D105
REV
6
NOTES:
1.
Subject loops must be connected in accordance with
ANSI/ISA RP12.6
2.
Barrier parameters must meet the following requirements:
CAUTION:
THESE REQUIREMENTS MUST BE
FOLLOWED FOR NEW INSTALLATIONS
OR MODIFICATIONS TO EXISTING
INSTALLATIONS.
Vt or Voc
≤
The lowest Vmax of the three FMRC
Approved apparatus installed in the loop,
and greater than 4.5 VDC
It OR Ioc
≤
The lowest Imax of the three FMRC
Approved apparatus installed in the loop.
La
> The sum of the cable inductance and the
internal inductance Li of each FMRC
Approved apparatus installed in the loop.
Ca
> The sum of the cable capacitance and the
internal capacitance Ci of each FMRC
Approved apparatus installed in the loop.
3.
Maximum safe area voltage should not exceed 250 Vrms.
4.
De-energize supply power before disconnecting loop
apparatus.
5.
Vmax and Imax values do not apply in explosion proof
installation.
6.
For Class II and III applications, model X54-201L/SR-EXP2
housing must be installed with Approved seal.
7.
For Division 2 installations, connection of the X54-201 l/SR
in the panel mount or EXP. PROOF ENCLOSURES does not
require a safety barrier when installed per the national
electrical code and when connected in a loop whose voltage
source cannot exceed 35 Vdc.
