20
LRR 1-60 - Installation & Operating Manual -
819692-00
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 LRR 1-60 conductivity controller is supplied with 24 V DC.
■
■
A safety power supply unit that delivers a Safety Extra Low Voltage (SELV) must be used to supply the
equipment with 24V DC.
■
■
Use an M 0.5 A fuse as an external fuse.
Connecting the MIN/MAX/CLOSED/OPEN output contacts
■
■
Connect the outputs as shown in the wiring diagram in Fig. 6.
■
■
Only use the terminals specified in the wiring diagrams.
■
■
Use a T 2.5 A fuse to protect the switching contacts.
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.
Connecting the actual value output (4 - 20 mA)
■
■
Please note the load resistance of max. 500
W
.
■
■
Use a shielded, multi-core twisted-pair control cable with a minimum conductor size of 0.5 mm
2
,
e.g. LIYCY 2 x 0.5 mm
2
.
■
■
Maximum cable length = 100 m.
■
■
Route connecting cables separately from power cables.
Connecting the standby input (24 V DC)
■
■
24 V DC input, for external command: Control OFF, Valve CLOSED, Intermittent blowdown OFF.
■
■
Maximum cable length = 30 m.
Connecting the potentiometer (0 - 1000
W
)
■
■
Use a shielded, multi-core twisted-pair control cable with a minimum conductor size of 0.5 mm
2
,
e.g. LIYCY 2 x 0.5 mm
2
.
■
■
Maximum cable length = 100 m.
■
■
Route connecting cables separately from power cables.
