Installing A Tim Module As Cp - Siemens SINAUT ST7 System Manual

Installing and putting a TIM into operation
4.5 Installing a TIM
General notices on use in hazardous areas according to ATEX
Requirements for the cabinet/enclosure
When used in hazardous environments corresponding to Class I, Division 2 or Class I,
Zone 2, the device must be installed in a cabinet or a suitable enclosure.
To comply with EU Directive 94/9 (ATEX95), this enclosure must meet the requirements of
at least IP54 in compliance with EN 60529.
Suitable cables for temperatures in excess of 70 °C
If the cable or conduit entry point exceeds 70 °C or the branching point of conductors
exceeds 80 °C, special precautions must be taken. If the equipment is operated in an air
ambient between 50 °C and 70°C, only use cables with admitted maximum operating
temperature of at least 80 °C.
Protection against transient voltage surges
Provisions shall be made to prevent the rated voltage from being exceeded by transient
voltage surges of more than 40%. This criterion is fulfilled, if supplies are derived from
SELV (Safety Extra-Low Voltage) only.
4.5.3

Installing a TIM module as CP

Note
If you intend to install a SINAUT ST7 MD2, MD3 or MD4 modem to the right of the TIM,
remember that the modem does not have an S7-300 backplane bus. There must therefore
be no S7-300 module that communicates with the CPU over the backplane bus (SM, FM or
CP) installed to the right of the modem.
To connect the TIM and MD2, MD3 or MD4 modem, no bus module connector is required
(nor does this ship with the modem). The connection between TIM and modem is only over
the connecting cable of the type 6NH7701 on the front.
Order of installation
Install a TIM as a CP in an S7-300 rack by following the steps in the order shown below:
1. Turn off the power supply to the CPU.
2. A bus module connector ships with the TIM. Insert this in the backplane connector of the
162
WARNING
WARNING
WARNING
module to the left of the TIM.
System Manual, 07/2009, C79000-G8976-C178-07
Station control system