YOKOGAWA DTSXL, User Manual, Page: 53 / 289

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A-30
IM 39J06B40-01EN 14th Edition: May 30, 2022
A4.6. FM Nonincendive
A4.6.1.
Precaution for Nonincendive
The DTSXL System have been approved that the products meet the Nonincendive (NI)
(*1) requirements of the FM Standards.
By this approval, these devices can be installed in Class I Division 2 (*2) hazardous
locations, but for compliance with the standard, the devices must be installed in a
cabinet approved by local explosion-proof testing organization.
*1: Nonincendive (NI):
NI is one of the explosion-proof systems of electrical products used in hazardous locations, particularly, in North
America. NI devices can be used in Class I Division 2 locations.
*2: Class I Division 2:
This is an location where gaseous / vaporous explosive atmospheres are not generated under normal conditions; if
generated, they exist for a short period of time only.
CAUTION
- Control equipment connected to the DTSXL System must not use or generate more
than 250Vrms or Vdc.
- Installation should be in accordance with the National Electrical Code (ANSI/NFPA
70).
- Associated Apparatus manufacture’s installation drawing must be followed when
installing this equipment.
- No revision to drawing without prior FM’s approval.
- WARNING - EXPLOSION HAZARD. DO NOT OPEN ENCLOSURE OR REPLACE
BATTERY WHEN A FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS
PRESENT.

Compliance
Class I, Division 2, Groups A, B, C, D T4
- Class 3600:2018
- Class 3611:2018
- Class 3810:2005
IMPORTANT
The DTSXL System is indoor use. For compliance with these standards, devices must
be installed in a lockable metal cabinet with a key. Use a cabinet approved by local
explosion-proof testing organization.