SS2-00-4E Automation Direct, SS2-00-4E Datasheet - Page 5

• Manufacturer Part Number: SS2-00-4E
• Description: Photoelectric Sensor
• Manufacturer: Automation Direct

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Programmable Four-wire
NPN or PNP
Two power supply wires, one
NO/NC selection input and one
output. The selection wire sets NO
or NC function depending on
which power supply terminal it is
connected to
Four-wire NPN or PNP
(complementary outputs)
Two power supply wires and two
complementary outputs, one NO
and the other NC.
Four wire NPN or PNP:
Two power supply wires and two
output wires. The type of output
can be programmed. NPN output
is obtained by connecting the PNP
terminal to the negative terminal.
PNP output is available by con-
necting the NPN terminal to the
positive terminal.
Open collector
The output transistor is not inter-
nally connected to a pull-up or
pull-down load. Therefore, it is
possible to connect an external
load supplied by an external
voltage. If the output is not the
open-collector type, it is possible
for the load to be supplied by an
external voltage using a blocking
diode in series with the output.
This solution increments the
output voltage drop.
DC OUT
Two power supply wires and two
optically decoupled output termi-
nals. Because of its decoupled
static relay, it is capable of offer-
ing NPN, PNP, parallel and series
configurations as well as interfac-
ing with any input desired. The
changeover (make-break) func-
tion allows switching from NO to
NC and vice versa by simply
reversing the polarity of the power
supply leads, allowing complex
logical functions.
Photoelectric Sensors Terminology
Three-Wire AC
Two power supply wires and one
output. The switching element is
connected between output termi-
nal and phase line. In the ON-
state, current is drawn from the
phase line and supplied to the
load through the output terminal.
The other load terminal is con-
nected to the neutral line.
Four-wire AC
Three power supply wires and one
output. Two of the supply wires
control the changeover function
and NO or NC can be selected as
desired by connecting to the
phase, while the unused lead
must not be connected.
Two-wire AC
The two leads make up the
switching element itself. In the
ON-state, with one terminal con-
nected to the phase and the other
to the load, current is drawn from
the phase line and supplied to the
load through the output terminal.
The other load terminal is con-
nected to the neutral line.
Electrical protection
Short circuit protection
All DC sensors are usually sup-
plied with integrated short-circuit
protection. AC sensors do not
have this protection and using
external devices such as fuses will
not protect them from internal
damage.
Output protection of DC sensors
in the case of short circuit or over-
current is effected by establishing
a maximum current threshold
(limiting current). When this
threshold is exceeded (usually
between 1.5 and 3 times Ie), the
proximity
output circuit.
Normal operation is resumed by
following
which vary according to type of
protection.
Fax orders 1-770-889-7876
certain
switch
opens
procedures
the
a) Autoreset: reset occurs auto-
matically after the cause of the
short circuit has been removed
b) With hold: to restore normal
operation it is necessary to cycle
power or switch off the power
supply and remove the cause of
the short circuit
In both cases, during the short
circuit one or a burst of current
pulses (whose amplitude can
reach 5A) will flow across the
output.
Overvoltage protection
When the UB voltage is exceeded
for a few moments, AC and DC
proximity switches will not gener-
ally be damaged provided dissi-
pated energy does not exceed
0.5J.
The AC sensors are not protected
when power supply voltage per-
manently exceeds Ub.
For sensors with both AC and DC
voltage, the Ub value in direct
current can be exceeded in con-
tinuation
damage until the equivalent peak
value in alternating current is
reached. In this particular range,
the sensor will not function, and
the output remains disconnected.
Polarity-reversal protection
No damage will occur to switches
if the supply wires are reversed.
Inductive-load protection
Unless otherwise stated, DC
sensors are fitted with an induc-
tive-load (surge) protection which
consists of a diode or Zener diode.
Status Indicators
The LED indicators can be classi-
fied according to color:
CONTINUOUS GREEN:Power on
CONTINUOUS YELLOW: Output
on
CONTINUOUS RED: Fault —
When there is only one LED, it is
usually red and indicates output
state.
without
Section 11 — Sensors
causing
647