Rackbus
For system use, wire the Rackbus as shown in Fig. 2.6.
•
For ZA 672 - Computer/PLC wiring see Operating Instructions BA 054E.
•
Be sure that the system is properly grounded. A difference in ground potential
between the Modbus device/personal computer serial connectors and the
ZA 672 Modbus Gateway can cause damage to the equipment or loss of
module programs
Analogue and relay
outputs
The negative terminal of the current output, of the voltage output and of the supply voltage
are connected to the circuit zero of the Silometer FMC 672 Z/677 Z module.
•
Any number of measurement and control units can be connected in parallel to
the voltage output, provided that all potentials are related to negative terminal
of the 24 V supply (R
L
≥
10 kOhm).
•
Only one non-floating device can be connected to each of the current
outputs.
•
There is no limit to the number of floating devices, apart from that imposed by
considerations of maximum or minimum load.
Alarms and limit switch relays can be connected as shown in Fig. 2.7.
•
Max. current per wire 3A : for switching capacity see Section 2.6.
BA064E13
Max. 64
Commutec
transmitters in
parallel on
Rackbus
Commutec transmitters FMB, FMC, FMU, PMX, TMT etc.
Fig. 2.6:
Rackbus wiring diagram
Max. current per wire 3 A
BA064E12
Fig. 2.7:
Suggestions for wiring together
relays and alarms
Recommended
Alternative 1
Alternative 2
Silometer FMC 672 Z/677 Z
Chapter 2: Installation
14
Содержание Silometer FMC 672 Z
Страница 6: ...Silometer FMC 672 Z 677 Z Notes on Safety 4...
Страница 59: ...Silometer FMC 672 Z 677 Z Operating matrix...
Страница 62: ...Silometer FMC 672 Z 677 Z Operating matrix...
Страница 63: ...Silometer FMC 672 Z 677 Z Operating matrix...
