YOKOGAWA CENTUM CS, Техническая информация

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2. Transportation, Storage and Installation
2-49
TI 33J01J10-01EN Mar. 29, 2019-00
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Example of Mounting N-IO Nodes (Non-Intrinsic Safety Barrier) in a Junction
Box
Temperature conditions
In this example, the ambient temperature is assumed to be the followings.
Junction Box ambient temperature 50 °C or less
Maximum numbers of units that can be mounted
Type Model Number of units that can be mounted per side
Per junction
box
NIU A2NN30D (*1) Up to 1
IOBP A2BN3D (*1) Up to 4 (2 rows × 2 shelves)
Other
Heat-generating device
(*2)
heat generation: 40 W or less
*1: Specify the temperature environment option (-40 to 70 °C).
*2: The device to be mounted shall be selected from those that have the ambient temperature range of +15 °C or more.
Heat-generating devices other than the above shall not be mounted in the junction box.
In this example, IOBP_IS cannot be mounted.
Mounting conditions
• Do not mount the IOBP so that its heat-generating part (adaptor or I/O) is located
immediately under the N-ESB Bus module (A2EN501). The IOBP may be mounted
immediately under the power supply of the NIU (A2PW50x).
• The NIU shall be mounted with a 2-unit or more space from the ceiling of the junction box.
• A 1-unit or more space shall be provided between the NIU and IOBP.
• To mount heat-generating devices other than NIU and IOBP shall be mounted with 30-mm
intervals on the right of the NIU on the top shelf. The specifications of the devices shall be
observed.