GESTRA URS 60, Original Installation & Operating Manual

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24 URS 60, URS 61 - Installation & Operating Manual -
819634-00
Electrical connection
Bus line, cable length and cross-section
■ ■
A shielded, multi-core, twisted-pair control cable, e.g. UNITRONIC
®
BUS CAN 2 x 2 x .. mm
2
or RE-
2YCYV-fl 2 x 2 x .. mm 2 must be used as the bus line.
■ ■
Pre-wired control cables (with plug and coupling) are available as accessories in various lengths.
■ ■
The baud rate (transfer rate) is determined by the cable length between the bus terminal devices, and
the wire cross-section is determined by the overall power input of the measuring sensors.
■ ■
As far as possible, route the bus line separately from power lines and protected from environmental
influences.
Connecting the 24V DC power supply
■ ■
The URS 60 / URS 61 is supplied with 24V DC.
■ ■
A safety power supply unit that delivers a Safety Extra Low Voltage (SELV) must be used to supply the
equipment with 24V DC.
Connecting the 24V DC I/O interface
■ ■
The I/O interface can be supplied with power either from the supply voltage of the safety control unit
(see above) or via a separate 24 V DC voltage.
■ ■
The signalling outputs and test inputs are wired using single-core wires e.g. H07V-U.
Instructions for connecting the safety circuit
■ ■
Connect the safety circuit to terminals 23, 24 and 26, 27.
■ ■
If using the equipment as a water level limiter to TRD, EN 12952/EN 12953, you must connect the
output contacts of the two monitoring channels to terminals 24 and 26 using a wire bridge.
■ ■
Use a T2A or T1A (T = slow-blow) fuse (TRD 604, 72 hrs. of operation) to protect the switching con-
tacts of the safety circuit.
■ ■
If the installation requires a lockout function, this must be implemented in the downstream (safety)
circuit. This circuit must conform to the requirements of EN 50156.
Notes on connecting inductive loads
All connected inductive loads, such as contactors and actuators, must have interference suppression
using RC combinations as per the manufacturer's specifications.