Carel DP, User Manual

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13
ENG
DP S030220660 rel. 2.3 - 06.12.2021
3.2 Electrical connections and DP -I A Q sensor wiring
Make the electrical connections as shown below, taking care to follow the polarities indicated
Wall version
30220660_015_R01
Inside the product, there is a double terminal block to simplify
connection in the case of several devices. The power supply and
the serial connection can be connected on a single terminal if it
is not necessary to use the double terminal block. Alternatively,
the power supply can be connected on one terminal and the
serial connection on the other, always respecting the instructions
on the product
Duct version
30220660_016_R01
Key:
A: TxRx+ RS485 positive serial output
B: TxRx- RS485 negative serial output
GND reference for power supply.
In the case of Vac power supply, connect one
of the 2 transformer wires.
U+: +24Vdc. In the case of Vac power supply,
connect the second transformer wire.
DIP1, DIP 2: DIP switch for setting the serial line
L1…L4: LED status
OFFSET
CALIBRATION: These trimmers are used to calibrate the
sensors. Do not use during normal product
operation. Return the product if tampered with.
T1: key used for calibration
manual CO2
T2: key used for calibration
manual VOC
Tab. 3.c
A 2-wire shielded multi-core cable with the following characteristics must be used for the serial connection:
• two-twisted
wires;
• shielded, preferably with earth wire;
• section AWG20 (diam. 0.7-0.8 mm; area 0.39-0.5 mm²) or AWG22 (diam. 0.55-0.65 mm; area 0.24-0.33 mm²);
• rated capacitance between the wires <100 pF/m.
A 2-core cable with 2 wires and a maximum cross-section of 1.5 mm² is recommended for the power supply