YOKOGAWA CENTUM CS, Technical Information

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2. Transportation, Storage and Installation
2-46
TI 33J01J10-01EN Mar. 29, 2019-00
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Example of Mounting N-IO Nodes (Intrinsic Safety Barrier) in a Cabinet
Temperature conditions (For direct field wiring to IOBP)
In this example, the ambient temperature is assumed to be the followings.
Cabinet ambient temperature 50 °C or less
Maximum numbers of units that can be mounted in case of this example
Type Model Number of units that can be mounted per side
NIU A2NN30D (*1) Up to 2
IOBP_IS
A2BN4D (*1) 8 (2 rows × 4 shelves)
A2BN5D (*1) 10 (2 rows × 5 shelves)
*1: Specify the temperature environment option (-40 to 70 °C).
Heat-generating devices other than the above shall not be mounted in the cabinet.
IOBP cannot be mounted.
Mounting conditions
• The NIU shall be mounted with a 100-mm or more space from the cabinet ceiling.
• A 1-unit (=44.45 mm) or more space shall be provided between NIU and IOBP_IS.
• Suitable length of signal cables and power cables should be used.
• Mounting the devices in the cabinet should be in line according to the intrinsic safety
standard.