5
Electrical installation
5.1
Safety precautions
Danger due to electric current
•
Work on electric components may only be carried out by trained electricians or by persons
instructed in electricity under the supervision of an electrician in accordance with electrical
engineering regulations.
•
It is forbidden to carry out work on electrically live parts.
5.2
Analog inputs
“
E2
”
/
“
E3
”
The unit has two analog inputs: Analog In 2
|
E2
|
and Analog In 3
|
E3
|
The connection is independent of the programmed operating mode and from the sensor signal
employed.
•
When connecting
passive
temperature sensorsTF.. (KTY81-210) or PT1000 at terminals
“
E2 / T2
”
and/or
“
E3 / T3
”
must be paid attention to no polarity.
For a high interference immunity a capacitor must be connected directly to the sensor (1 nF
parallel). With ZIEHL-ABEGG temperature sensors type TF.. (KTY81-210) the capacitor is inte-
grated.
•
When connecting
aktive
sensors at the terminals
“
E2 / GND
”
and/or
“
E3 / GND
”
attention must be
paid to correct polarity, a 24 V DC power supply is integrated.
•
For sensors in two-wire-technology (4 - 20 mA signal), the connection is made on the
“
E2 / 24 V
”
and/or
“
E3 / 24 V
”
,
“
GND
”
terminal is omitted.
Attention!
Never apply line voltage to analog inputs!
5.3
Analog output (0 - 10 V)
“
A1
”
The analogoutputs 0 - 10 V can be allocated with various functions (
IO Setup: Analog output
“
A
”
).
Connection to terminal
“
A
”
-
“
GND
”
=
“
Analog Out
”
(I
max
technical data / connection diagram).
It is not permissible to connect outputs of several devices to each other!
5.4
Voltage supply 24 V DC
There is an integrated power supply for external devices, e.g. a sensor. Te24 V, output voltage
tol/- 20%. Max. load current 70 mA.
In case of overload or short circuit (24 V
–
GND), the external power supply is shut down (multi-fuse).
The device performs a
“
Reset
”
and continues operation.
It is not permissible to connect outputs of several devices to each other!
5.5
Connection external terminal type A-G-247NW or AXG-1A(E)
If necessary an external terminal can be connected. This can be e.g. necessary to adapt the pre-
setting during start-up. For information about the current operating condition a terminal can be
permanent attached.
•
The connection is made via a 4-strand line at the terminals (D-, D+ and GND).
•
e.g., telephone
fl
ex e.g. J-Y (St) Y 2x2x0.6 (or similar), maximum line length ca. 250 m.
•
Signal
“
D+
”
and
“
D-
”
(RS 485)
Operating Instructions
AM-PREMIUM(-W)
–
model series
Electrical installation
L-BAL-E095-GB 1618 Index 006
Part.-No.
8/90
