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Prophi
15T-III
®
Section 12: INTERFACES
As a standard, the Prophi 15T-III is equipped with two isolated RS485 interfaces
according to the following assignment:
View from
bottom :
.
The following functions can be realized via the interfaces:
R Remote read out of grid parameters, storage, display, grid analysis
Usage as system interface for connection of accessories or for coupling of two
R
controllers
Usage for customer specific applications (facility master control system, SPC etc.)
R
Usage in a network (MODBUS-Protocol)
R
Interface 1 mainly designed for customer specific applications, whilst
Interface 2 intended for coupling with accessories.
Coupling with a PC for the usage of Windows-Software can be done from both interfaces
with accessory "USB-adapter".
RS485- Bus structure
All devices are connected to one line in parallel. This requires a direct connection of the
bus lines to the plug connection of the device (no junction box).
Cable
For connection a twisted and shielded cable has to be used. The shielding has to be
connected with casing or cabinet parts at both ends.
Max. cable length in the bus is 1,200 m (depending on cable and baud rate).
At the first and at the last device of the bus the cable has to be terminated with resistors.
Activation (termination) on the controller side is done with the switch "Termination" next
to the clamp "Interface1" (both white switches on "ON").
28
Interface 1
Switch
Termination
Gnd B
A
PE
( L1)
( N )
L1
L2
L3
N(PE)
Supply voltage Ub
Meas.voltage Um
110-230V~
30 - 440V L-N
- 27 -
Interface 2
ext. Input
230V~
L2
L1
L3
k
l
k
l
k
Measuring current
n.c.
l
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