Carel UU02 - Electrical Connections to the Slave Panel; Connection Cable Sizing

18
ENG
“humiSonic ventilation” +0300063EN - rel. 1.0 - 16.02.2016
3.7 Electrical connections to the “Slave” panel
Below is the connection diagram between the terminal block on the
“Slave” electrical panel and the terminal block on the humidifi er.
+48 V
- 48 V
G
G0
PE
L
N
+5
WHITE
RED
R
B
FAN
PE
+ 48 V - 48 V
G
G0 0TXRX +TXRX -TX/RX
+5V
WHITE
RED ONOFF COM AL_A AL_B
SHD
PE
Alarm
Power
Supply
L
N
PE
Serial
connection
HumiSonic terminal block
Basic panel terminal block
Fig. 3.n
HUMIDISTAT OR REMOTE CONTACT (ON/OFF action)
Production is enabled by closing the ONOFF – COM contact on the
terminal block. This can be connected to a switch, a humidistat or a
controller (voltage-free contact, max 5 Vdc open, max 7 mA closed).
RS485 SERIAL CONNECTION
CAREL/ Modbus protocol: -TXRX-, +TXRX, 0TXRX terminals.
Important
Important: for RS485 connections in household (IEC EN 55014-1)
and residential (IEC EN 61000-6-3) environments, use shielded cable (with
shield connected to PE both on the terminal and controller ends),
maximum length specifi ed by the EIA RS485 protocol, equivalent to
European standard CCITT V11, using AWG26 twisted pair cable; the input
impedance of the 485 stage is 1/8 unit-load (96 kOhm). This confi guration
allows a maximum of 256 devices to be connected, with cables in
separate conduits from the power cable.
ALARM RELAY
Terminals: AL_B, AL_A
Ready for remote signalling of one or more alarms.
Note: in industrial environments (IEC EN61000-6-2) the signal cables
leaving the unit must not exceed 10 m (33 ft) in length: remote on/off digital
input (ON/OFF - COM terminals) and shielded cable for RS485 communication.
3.8 Connection cable sizing
The table below shows the sizing of the 48 Vdc connection cable between
the humidifi er and the “Slave” or “Master” electrical panel. The minimum
cross-section depends on the length. Use cable for working voltages
≥ 300 Vac and operating temperatures ≥ 90°C.
P/N Current (A) L=5 m L=10 m
AWG (mm
2
)
UU02D% 3.2 14(2.5) 14(2.5)
UU05D% 6.4 14(2.5) 14(2.5)
UU07D% 9.6 14(2.5) 13(4)
UU09D% 12.8 14(2.5) 13(4)
UU14D% 19.2 10(6) 10(6)
UU18D% 24 10(6) 9(10)
Tab. 3.a
24 Vac connection: two-wire cable, type AWG 16 (1.32 mm
2
).
Light connection (“Slave” panel only): three-wire shielded cable, type
AWG 22 (0.33 mm
2
).