Installation
05/06 AWB2724-1584GB
22
Connecting transistor outputs
EC4P-221/222-MT…, EASY6…-DC-TE
Parallel connection:
Up to four outputs can be connected in parallel in order to increase
the output power. This enables a maximum output current of 2 A.
The following must be observed if inductive loads are not provided
with a suppressor circuit: Several inductances must not be
switched off simultaneously in order to avoid the risk of the driver
modules overheating. If the +24V DC power supply is
disconnected via a contact in the event of an Emergency-Stop, and
if in this case more than one triggered output with an inductive
load may be switched off, these inductive loads must be provided
with a suppressor circuit (a following figures).
Behaviour in the event of a short-circuit/overload
A transistor output will switch off in the event of a short-circuit or
overload. The output will switch back on up to the maximum
temperature after a cooling time that depends on the ambient
temperature and the current level. If the fault continues, the
output will switch off and on until the fault is rectified or the power
supply is switched off.
EC4P-221/222-MT… easy6…-DC-…
Figure 22: Transistor outputs EC4P-221/222-MT…, EASY6..-DC-TE
0 V
Q1
S1 S2 S3 S4 S5 S6 S7 S8
Q2 Q3 Q4 Q5 Q6 Q7 Q8
F 10 A
Q
24 V
Q
0 V
Q
24 V
Q
F 10 A
f 2.5 A
f 2.5 A
0 V H
RL
Q5 – Q8
Q1 – Q4
5 W
3 W
0.5 A
24 V H
0.5 A
24 V
(20.4 – 28.8 V H)
+ 24 V H
RL
5 W/24 V
0.5 A
24 V H
0.5 A
i
Caution!
Note the following when disconnecting inductive loads:
Suppressed inductive loads cause less interference in the
entire electrical system. Connecting the suppressor circuit
as close to the inductance as possible is recommended.
i
Caution!
Only outputs of the same group (Q1 to Q4 or Q5 to Q8)
can be connected in parallel; e.g. Q1 and Q3 or Q5, Q7
and Q8. Outputs connected in parallel must be switched
at the same time.
Figure 23: Inductive load with suppressor circuit
+ 24 V H
Q., S.
U
emax
< U
Z
< 33 V
0 V H
Q., S.
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