Proline Promass 83E/F/O Modbus RS485 Operating Instructions

Proline Promass 83 Modbus RS485Wiring!Note!4.2.2 Cable specification for connecting cableThe specifications of the cable connecting the transmitter and the sensor of the remote version areas follows:• 6 × 0.38 mm PVC cable with common shield and individually shielded cores• Conductor resistance: 50 /km• Capacitance core/shield: 420 pF/m• Cable length: max. 20 m (65 ft)• Permanent operating temperature: max. +105 °C (+221 °F)The cable must be installed in a manner in which it is fixed securely.4.3 Connecting the measuring unit#Warning!4.3.1 Transmitter connection• Risk of electric shock. Switch off the power supply before opening the device. Do not install orwire the device while it is connected to the power supply. Failure to comply with this precautioncan result in irreparable damage to the electronics.• Risk of electric shock. Connect the protective earth to the ground terminal on the housing beforethe power supply is applied (not required for galvanically isolated power supply).• Compare the specifications on the nameplate with the local supply voltage and frequency. Thenational regulations governing the installation of electrical equipment also apply.1. Unscrew the connection compartment cover (a) from the transmitter housing.2. Feed the power supply cable (b), the signal cable (d) and the fieldbus cable (e) through theappropriate cable entries.3. Perform wiring in accordance with the respective terminal assignment and the associatedwiring diagram." Caution!– Risk of damage to the fieldbus cable!Observe the information about shielding and grounding the fieldbus cable ä 27.– We recommend that the fieldbus cable not be looped using conventional cable glands. If youlater replace even just one measuring device, the bus communication will have to beinterrupted.4. Screw the cover of the connection compartment (a) back onto the transmitter housing.Issue/Rev. 0.2 (12/12) MN0M030 • Page 29