marposs P3UP - Page 32

Installation and User Manual
32
INPUTS OUTPUTS
“I/O TYPE A1” or I/O TYPE A5” variants
Are equipped with 24 V d.c. or 24 V a.c. r.m.s. drivable
inputs, the difference between the two versions is
explained below.
1. SINK/SOURCE c
urrent, 24 V d.c. drive. The
SINK/SOURCE current connection for the inputs
can be selected by connecting the inputs
common terminal. Electrical specifications:
• input active
V
I
(ON) = 15 to 30 V d.c.
I
I
(ON) = 10 mA (V
I
= 24 V d.c.), 6 to 12 mA (V
I
= 15 to 30 V d.c)
• Input deactivated
V
I
(OFF) = (−3 to 5) V d.c.
[
N.B.
The SINK current type inputs connection
features specifications that are compatible
with the "TYPE 1" digital inputs as defined in
the Standard EN61131-2.
WARNING
The machine inputs mus
t be supplied by a
SELV (Safety Extra Low Voltage) power
source, as defined in the Standard EN60950-
1.
2. 24 V a.c. (sinusoidal) drive, specifications:
• input active
V
I
(ON) = 18 to 30 V a.c.
I
I
(ON) = 10 mA a.c. (V
I
= 24 V a.c), 7 to 12 mA
(V
I
= 18 to 30 V a.c)
• Input deactivated
V
I
(OFF) <= 3 V a.c.
[
See N.B. (*CURRENT AND VOLTAGE
VALUES)
at page 30
WARNING
The machine inputs must be supplied by a
SELV (Safety Extra Low Voltage) power
source, as defined in the Standard EN60950-
1.
[
N.B.
The “SINK current” input is driven by a switch
or limit switch connected between the input
itself and the positive pole of the machine I/O
power supply. The SOURCE current input is
driven by a switch or limit s
witch connected
between the input itself and the negative pole
of the machine I/O power supply.
"I/O TYPE A1" variant
Relay with N.O. contact (Normally Open = closed
when active)
•
Maximum current per contact: 3 A, with restive
load
• Maximum relay common contact current: 3.5 A
• Maximum voltage: 150 V a.c. r.m.s., 50-60 Hz (-
6% / +5%) or 30 V d.c.
•
parasitic current for each open contact: 1.3 mA
max (150 V a.c.)
BEWARE
The outputs are not protected: install on
the shared outputs a magnetothermic
protection device with nominal curr
ent not
greater than In= 4°, characteristic “B” in
compliance with EN60947 and magnetic
trigger current not greater than 4 In= 16A
or an equivalent fuse. It is left to the user's
discretion whether to protect the individual
outputs with a suitable device.
The power
supply should also be fitted with a
differential circuit breaker.
"I/O TYPE A2" and "I/O TYPE A3" variants
Relay with N.O. contact (Normally Open = closed
when active)
•
Maximum current per contact: 3 A, with restive
load
• Maximum relay common contact current: 3.5 A
• Maximum voltage: 250 V a.c. r.m.s., 50-60 Hz (-
6% / +5%) or 30 V d.c.
•
parasitic current for each open contact: 2 mA
max (250 V a.c.)
BEWARE
The outputs are not protected: install on
the shared outputs a magnetothermic
protection
device with nominal current not
greater than In= 4°, characteristic “B” in
compliance with EN60947 and magnetic
trigger current not greater than 4 In= 16A
or an equivalent fuse. It is left to the user's
discretion whether to protect the individual
outputs
with a suitable device. The power
supply should also be fitted with a
differential circuit breaker.
ATTENTION
The TYPE A3 I/O module has been
designed for use with input and output
voltages of 230 V a.c., however, while it is
also possible to use lower
voltages, for
example 24 V d.c. or a.c., for the outputs, it
is important to bear in mind that, even
under these conditions, the voltage on the
output pins should be regarded as
hazardous, therefore it is necessary to take
the precautions necessary when working
with circuits where the maximum power
supply voltage is 250 V a.c