Other Applications; Series Connection; Parallel Connection - Elektro-Automatik PS 800 R series Handbuch

Applications
Pin assignment and technical specifications of the analogue interface:
1
Pin Name Type
1 VSEL AI
2 CSEL AI
3 VREF AO Reference voltage
4 VMON AO Actual value: current
5 CMON AO Actual value: voltage
6 AGND
7 Remote DI
8 Rem-SB DI
9 OT / OVP DO
10 DGND
11 Reserved X
12 Reserved X
1)
AO = Analogue output, DI = digital input, DO = digital output
6. Other applications
6.1 Series connection
It is possible to connect multiple units of the same type
to a series connection if these rules are followed:
• No master-slave operation
• The grounds of the analogue interfaces MUST NOT
be connected to each other. This also applies for any
other signal on the analogue interfaces. If remote
control is required, it can be done using galvanic
isolation amplifiers and by controlling all units in
parallel.
• Any load current leading conductor must be dimen-
sioned for the maximum output current of the unit
with the highest nominal output current.
!
Caution! A maximum allowed 720V total
voltage of a series connection must not
be exceeded!
© 2010, Elektro-Automatik GmbH & Co. KG
Description
Set value: Voltage
Set value: Current
Reference for analogue signals
Activate external control
Power output off
Overtemperature OT /
Overvoltage OVP
Reference for digital signals
must not be connected
must not be connected
Level
0....10V correspond to 0....100% of U
0....10V correspond to 0....100% of I
10V
0....10V correspond to 0....100% of U
0....10V correspond to 0....100% of I
External = Low (U <1V),
low
Internal = High (U >4V)
high
Off = Low (U <1V),
low
On = High (U >4V)
high
Low = No error (U <1V)
low
High = Error (U >4V)
high
6.2 Parallel connection
Multiple units with identical output voltage and ideally
identical output current can be used in parallel con-
nection (master-slave or other).
Here the monitor outputs of the master are connected
to the set value inputs of the slave(s) etc.
An example of master-slave wiring with both, voltage
and current:
In case the slave(s) shall only be controlled by cur-
rent (or voltage), the other set value can be tied to
pin VREF or adjusted by an external circuit.
Electrical specifications
Accuracy <0.5%, U
nom
max
Input impedance >100k
nom
Accuracy <0.5% at I
max
Accuracy 0.2% at I
nom
max
Short-circuit-proof against AGND
nom
For CMON, VMON
U = 30V
max
Imax = -1mA at 5V
U = 30V, I = 20mA
max max
Quasi Open Collector with
pull-up to +15V
For control and monitoring signals
EN
= 12V
= 5mA
= +2mA
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