BASI BLD-457, Руководство пользователя

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User manual - METER BDL-457
16
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 19 and 20 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.
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Figure 4.15. 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.
a) b)
Depending on version:
85... 230 V AC/DC or ...260
19... 24 ...50 16... V DC; 24 V AC ...35
1 2 3 4
R1
5 6
R2
7 8
R3
9 10
R4
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FUSE
FUSE
!