2 Safety
| Intended use
6
Manual Stepper motor module UR20-1SM-50W-6DI2DO-P
2575290000/03/03.2020
Shielding
Shielded lines are to be connected with shielded plugs and
fixed on a shield bus in compliance with the relevant stan
-
dard (see u-remote IP20 manual, Chapter 8).
2.2 Intended use
The stepper motor module UR20-1SM-50W-6DI2DO-P is an
I/O module from the u-remote series that is designed for use
in a u-remote station. The module can be used to connect
a two-phase stepper motor with the u-remote station. The
connected motor must have a nominal current of at least
200 mA.
The motor and module electronics are supplied by an exter-
nal power supply (12–50 V DC). If the stepper motor module
is used with a safe power-feed module (UR20-PF-O-X-SIL),
note that only the digital outputs on the stepper motor
module are safely switched off. The system operator must
ensure that the external power supply is disconnected in the
event of a fault.
The products of the u-remote series are intended for use in
industrial automation. A u-remote station with bus coupler
and connected modules is intended for the decentralised
control of systems or sub-systems. Via the fieldbus coupler
every module of a station is integrated into a fieldbus struc
-
ture and connected to the superordinate control unit. The
u-remote products conform to protection class IP20 (in ac-
cordance with IEC 60529).
The observance of the documentation is part of the intended
use. The products described in this manual may only be used
for the intended applications and only in connection with
certified third-party devices or components. The product-
specific protective measures can become ineffective in the
event of deviating use.
2.3 Use in a potentially explosive atmosphere
Unless otherwise noted, the u-remote products can be used
in potentially explosive atmospheres rated as Zone 2 (as per
Directive 2014/34/EU). The u-remote products are suitable
for use in Class I, Division 2, Groups A to D according to
NFPA publication 70.
If u-remote products are used in potentially explosive atmos-
pheres, the following notes are also applicable:
–
Staff involved in assembly, installation and operation
must be qualified to perform safe work on electrical sys-
tems protected against potentially explosive atmospheres.
–
The requirements according to IEC 60079-14 must be
observed.
–
The substitution of any components may impair suitability
for Class I, Divsion 2.
–
The equipment shall be installed in an enclosure that pro-
vides a degree of protection not less than IP54 in
accordance with IEC 60079-15, accessible only by the
use of a tool.
–
The housing enclosing must meet the requirements of
explosion protection type Ex n or Ex e.
–
The u-remote station may only be installed in horizontal
orientation.
–
Sensors and actuators that are located in Zone 2 or in a
safe zone can be connected to the u-remote station.
–
If the ambient temperature under rated conditions exeeds
55 °C, the cables used for feed-in (on the fieldbus coupler
and on power-feed modules) must be specified for at
least 90 °C.
–
If the temperature under rated conditions exceeds 70 °C
at the cable or conduit entry point, or 80 °C at the bran
-
ching point of the conductors, the temperature specifica-
tion of the selected cable shall be in compliance with the
actual measured temperature values.
–
The equipment shall only be used in an area of not more
than pollution degree 2, as defined in IEC 60664-1.
–
A stabilised power supply with double or reinforced insu-
lation must be used (24 V DC current for supplying the
u-remote station, 12–50 V DC current for the separate
power supply).
–
A visual inspection of the u-remote station is to be perfor-
med once per year.
–
While explosive atmosphere is present:
–
No electrical connection shall be separated in ener-
gized condition.
–
The USB interface shall not be used.
–
Dip-switches, binary-switches and potentiometers shall
not be actuated.
