QUANTA DQ61, User Manual, Page: 8 / 22

Pag. 8
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5.2 Rear Panel
Figure 3
Table 2: Terminal Blocks
Terminal Reference
number
1. 1 2 3 4 Common terminal shield for Pt100 probes
2.
5 … 16
Terminals for connection to Pt100 sensors
3. 17 18 19 Optional RS485 Serial Communication
4. 20 21 22 Power Supply 16-26Vac-dc
5. 23 24 25 Power Supply 90-250Vac
6.
26 … 37
Relays Terminal Blocks (5A 250V)
5.3 Power Supply
On the secondary of large transformers may be present very strong transient disturbances, which might exceed
the filters and safeguards built into DQ61 and destroy it; for this reason it is advisable to power it by a
transformer 24VAC or 24VDC power supply. If the power is taken directly from the secondary of the
transformer to be protected, fit a suitable additional filter. For more information please contact QUANTA S.r.l.
5.4 Electrical Connections
For the connection of the measuring sensors (Pt100) it is essential to observe the following rules:

They must be placed separate from the power cables.

They must be made with shielded twisted conductors.

Must have a minimum cross section of 0.5 mm
2
.

Must have conductors silver or tin.
1
2
6 5
4
3