KEM TRICOR TCE80 -E Series, Manual

Page: 70 / 98

Remote Operation
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5 Remote operation
As a standard the TCE8000 is equipped with an RS-485 Interface. Optionally also a HART or
Foundation Fieldbus interface is available.
5.1 RS485
5.1.1 Electrical connection of RS-485
Prepare the TCE8000 and the cable as described in chapter 3.2.2 or 3.2.3.
Connect the signal RS-485A or RS-485+ (both names are used in the literature) to terminal 22 and
RS-485- or RS-485B to terminal 21.
Terminal 20 is the ground reference pin for the interface and is connected to GND (terminal 8) with the
non- Ex versions and connected to PE (terminal 52) with the Ex versions.
NOTE:
The operating range of the data terminals (21 and 22) is -7V to +12V referred to the reference
pin (20). Voltages outside that range could damage the TCE8000.
5.1.2 Ex installation of RS485
The RS-485 terminals are designed for an operating voltage of -7V to +12V and a rated voltage of 30V
AC.
For connecting the interface refer to chapter 5.1.1 and 3.3.
WARNING!
Applying more than 30V DC to any of the RS-485 terminals will damage the TCE and destroy
the protection of the TCM!
WARNING!
If more than 30V have been applied to any of the RS-485 terminals, the unit must be returned
to KEM for repair as the safety barrier might be destroyed!
5.1.3 RS485 Interface Protocol
For setting up a communication refer to the command list available from KEM.