Installation And Mounting; Terminal Wiring - IDEC EB3S Quick Start Manual

External wiring examples
Relay output
(Example: EB3S-BR04AN)
Sensor Sensor Sensor
P1 S1 N1 P2 S2 N2 P3 S3 N3
L N A1 C1 A2 C2 A3 C3
〜
Sensor wiring
When using through-beam sensor
Projector Receiver
Internal circuit Internal circuit
Connection box
Hazardous area
Non-hazardous area
(safe area)
P1 S1 N1
EB3S
A1 C1
L N
Instructions

1. Installation and mounting

(1) The product can be mounted in any direction.
(2) Install the product in a safe area (non-hazardous area) in
accordance with intrinsically safety ratings and parameters and
install in an enclosure to prevent shock.
(3) When installing or wiring the product, prevent electromagnetic and
electrostatic inductions in the intrinsically safe circuit and contact
with other circuits.
(e.g.) Maintain at least 50 mm clearance between the intrinsically
safe circuit and non-intrinsically safety circuit. If less than 50
mm, provide a metallic separating board with a gap of 1.5mm
maximum between the intrinsically safe circuit and non-
intrinsically safety circuit.
However, if there are power circuits or high-voltage circuits
nearby, see references such as installation documents to
ensure that the space between the intrinsically safe and non-
intrinsically safe circuit is sufficient.
(4) To prevent contact between intrinsically safe circuits and non-
intrinsically safe circuits inside the enclosure, install the products
with the intrinsically safe circuit and non-intrinsically safe terminals
arranged in the same direction.
Non-intrinsically EB3S
safe circuit
(5) Maintain at least 3mm clearance between the terminal of the
intrinsically safe circuit or the relay terminal block of the intrinsically
safe circuit and the grounded metal part of a metal enclosure.
(6) When installing, mount on a 35-mm-wide DIN rail or directly on
a panel using screws. Make sure to install securely to withstand
vibration. When installing on the DIN rail, push the hooks all the way
in and secure them securely using the end clip.
(7) Excessive extraneous noise may cause malfunction and damage to
the product. If the voltage limiting circuit (thyristor) inside the barrier
activates due to noise, all LEDs turn off, and the output will turn off.
When the voltage limit circuit activates, be sure to remove the noise
source because it does not automatically reset after shutting off the
Transistor sink output
(Example: EB3S-BT04DN)
Sensor Sensor Sensor
P4 S4 N4 P1 S1 N1 P2 S2 N2
＋
−
A4 C4 A1 C1 A2 C2
Load power
AC/DC
24V DC
Diffuse re ective sensor
When a polarized re ector sensor is used
Internal circuit
Hazardous area
Non-hazardous area
P1 S1 N1
EB3S
A1 C1
L N
Intrinsically safe circuit
EB3S EB3S
Intrinsically safe circuit
EB3S Sensor Barrier (Intrinsically Safe Explosion-Proof)
Transistor source output
(Example: EB3S-BT04DN)
Sensor Sensor
P3 S3 N3 P4 S4 N4
＋ −
A3 C3 A4 C4
Load power
24V DC
24V DC
Note: See instructions for wiring.
(safe area)
For wiring photoelectric sensord
follow according to the speci cations of the sensor.
power of the barrier. When the noise is removed, the barrier will
return to normal operation before powering up again.
(8) The power LED on the barrier lights on in green at normal status. If
the power LED is lights on in red, replace the product.

2. Terminal wiring

(1) Use a ø5.5mm or smaller screw driver. The recommended tightening
torque for screws (including unused wiring terminal screws) is 0.6 to
1.0 N-m.
(2) Make sure that IP20 is achieved when wiring. Use insulation tubes
on bare crimping terminals.
(3) To prevent disengaged wires from contacting with other intrinsically
safe circuits, bind together the wires of one intrinsically safe circuit.
(4) When the adjacent terminal is connected to another intrinsically
safe circuit, provide an insulation distance of at least 6 mm.
3. Sensors in hazardous areas
(1 ) Sensors that can be connected to the sensor barrier must pass the
certification for the sensor itself. Make sure that the sensors satisfy
the following conditions.
• Intrinsic safety ratings and parameters (Safety rating)
Intrinsically safe circuit allowable voltage: Ui 13.2V minimum
Intrinsically safe circuit allowable current: Ii
Intrinsically safe circuit allowable power: Pi
• Performance categories and groups
Performance Category: ia, ib Group: IIA, IIB
• Sensor maximum internal inductance (Li),
Sensor maximum internal capacitance (Ci)
Barrier maximum external inductance (Lo)
Barrier maximum external capacitance (Co)
Inductance (Lc) of the intrinsically safe circuit external wiring, and
relationship between the capacitance (Cc) of the intrinsically safe
circuit external wiring
Li≤Lo-Lc
Ci≤Co-Cc
(2) Use a 3-wire sensor with an NPN transistor open collector output.
(3) Sensors connected to the sensor barrier must have an insulation
rating of at least 500V to hazardous location ground for both the
charging part and the wiring.
Sensor Sensor Sensor Sensor
P1 S1 N1 P2 S2 N2 P3 S3 N3 P4 S4 N4
A1 C1 A2 C2 A3 C3 A4 C4
56mA minimum
185mW minimum
Load power
24V DC
4