12 Check-List for Mounting
12-5
Did you avoid branch cables?
With potential differences: are the appropriate compensating cables used?
Was the cable sheath stripped off properly so that it can be put on the contact
ledge?
Are the connectors fastened with screws?
With redundancy:
Is the used connection suitable for the RLM 01?
Is an external termination installed at both cable ends?
With FO cables, only: Is the appropriate interface converter used?
Are signals RTS, VP and GND connected in addition to the interface converter?
Is the appropriate FO cable used?
Cabling the serial module EI 820F (4.3.2)
With RS232C, only: Is the max. cable length of 15 m observed?
Is the appropriate cable used (with sufficient wire CSA, shielded)?
Was the connector shield applied to terminal P?
Were all connector pins not assigned to RS232C left free?
Was the cable sheath stripped off properly? Was the cable connected properly
to the contact ledge?
Are the connectors fastened with screws?
Was the terminal block connected properly? Did you check the connection?
With redundancy:
Is the connection between the terminal blocks correct?
With RS485, only:
Did you select either internal or external termination?
With internal termination:
Is the termination active, if the module is located at the end of the bus?
With external termination:
Were both cable ends terminated properly?
Is the internal termination disabled?
Is a 1kΩ pull-up, 100Ω and 1kΩ pull-down resistance circuitry used as the
external termination?
Is an external 5-V power supply provided for external termination?
Were all connector pins not assigned to RS485 left free?
Is the appropriate cable used (sufficient wire CSA, shielded)?
Is the connector shield applied properly to terminal P?
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