2. Explosion Protection Instrumentation in Zone 2/Division 2
2-5
TI 32S01J30-01E
Power Supply Wiring
The power cables for the safety control unit, safety node unit, unit for optical ESB bus repeater
module, and N-IO node must be wired from a non-hazardous area by using specified Division 2,
explosion-proof wiring such as conduit wiring.
In addition, do not apply stress on the both ends of the wiring cable.
The wiring should conform to the NEC (National Electrical Code: ANSI/NFPA-70), CEC
(Canadian Electrical Code) or wiring construction standards of the countries or regions where
wiring is laid.
The power cable of N-IO field enclosure must be wired in accordance with the instructions
provided in the related GS (General Specifications), TI (Installation Guidance) and IM (User’s
Manuals).
Signal Wiring
Cables other than power cables should be explosion-proof wiring that is defined in NEC (National
Electrical Code: ANSI/NFPA-70), CEC (Canadian Electrical Code) or the wiring construction
standards of the countries or regions where wiring is laid. Please follow the procedure below.
• When, Vnet/IP cables, ESB bus cables or GPS connection cables are connected outside
the cabinet, use explosion-proof wiring.
• When field wiring to I/O modules (including terminal blocks, terminal boards, etc.) is laid
outside the cabinet, use explosion-proof wiring.
• When an ALR111, ALR121, ALE111, S2LP131, S2EN402 or S2EN404 Communication
Module is connected, use explosion-proof wiring.
• The signal cable of N-IO field enclosure must be wired in accordance with the instructions
provided in the related GS (General Specifications), TI (Installation Guidance) and IM
(User’s Manuals).
IMPORTANT
(1) Attaching or removing a cable, a fuse or a card
In the system in operation, never attach or remove a cable, a fuse or a card in a explosive
atmosphere.
(2) Product maintenance
When product maintenance is carried out for the system in operation, never attach or
remove the product in a explosive atmosphere.
<English>
WARNING-EXPLOSION HAZARD-
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE
NON-HAZARDOUS.
<French>
AVERTISSEMENT-RISQUE D’EXPLOSION. NEPAS DE’BRANCHER TANT QUE LE
CIRCUIT EST SOUS TENSION, Á MOINS QU’IL NE S’AGISSE D’UN EMPLACEMENT
NON DANGEREUX.
Dec. 3, 2021-00
