User manual - CONTROLLER PUR-49D
a)
b)
c)
Figure 4.15. Connection of RTD sensors:
a) 4-wires circuit; b) 3-wires circuit; c) 2-wires circuit
The connection circuit should not be changed while unit is powered. While using
TC, RTD or voltage inputs (0-150mV) the device is able to detect wire breaks. Wire
breaks are detected within about 2 seconds. For connectors number 32 and 33 of
RTD input it may take up to about 7 seconds. During detection measurements will
be incorrect. If wire break is detected
"S.Err"
(sensor error) message is displayed.
Depending on version:
85...
230
...260V AC/DC or
19...
24
...50V DC; 16...
24
...35V AC
Figure 4.16. Connection of power supply and relays
Contacts of relay outputs are not equipped with spark suppressors. While use
the relay outputs for switching of inductive loads (coils, contactors, power
relays, electromagnets, motors etc.) it is required to use additional
suppression circuit (typically capacitor 47nF/ min. 250VAC in series with
100R/5W resistor), connected in parallel to relay terminals or (better) directly
on the load. In consequence of using the suppression circuit, the level of
generated electromagnetic disturbances is lower, and the life of relay contacts
rises.
17
!
i
R4
FUSE
1
2
L N
L N
10 11 12 13 14 15
3 4
FUSE
R1
R2
R3
RTD
Ra
Rb
Rc
Rd
Ra, Rb, Rc, Rd can be different
31 32 33 34
RTD
Ra
Rc
Rd
Ra = Rc =
Rd
n.c.
31 32 33 34
31 32 33 34
Ra
Rc
n.c.
RTD
n.c.
Ra, Rc can be different
Содержание PUR-49D
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