Electrical Connections; Pump Unit Control Board - Elsteam EHPN Series Operating And Maintenance Manual

6.5 Electrical connections

6.5.1 Pump unit control board

Power supply
TERMINALS
1-2 24 Vac power supply
Output Out1: inlet solenoid valve for single-
1-3
branch or room versions
Output Out2: outlet solenoid valve for single-
1-4
branch or room versions
Output Out3: disinfection solenoid valve
1-5
(single-branch) or room ventilation enable
6-7 Output Out4: dehumidification enable
8-9 Output Out5: indicator
10...12 Digital output Out6: alarm
13-14 No connection N.C.
20-21 Digital input: enable (CV)
22-23 Digitalinput:remoteON/OFF(0/1)
Digital input S0: humidistat for single-
24-25
branch or room versions (CFGp=0-1)
924EHPNE4.01 - EHPN series humidifiers
S2 S3
S0 S1
Out4
Fig. 32. Electrical connections for the pump unit control board
RS-485
Out5 Out6
26-27 Analogue input S1: pump temperature (NTC)
28...30 Analogue input S2: pressure transducer (4...20 mA)
Input S3: humidity sensor for single-branch or room versions
31...33
(CFGp=HUM)
34...37 Reserved.
38...40 RS-485 serial line connection for BMS Modbus
CANBUSseriallineconnectiontothedistributionrackanduser
41...44
interface
45-46 No connection N.C.
47...50 Connection to the inverter
Activate termination resistor on SCI1 RS-485 serial line.
DP1
1 =SCI1 RS-485 serial termination; 2=Reserved
Termination resistor on BMS / CANBUS RS-485.
DP2 1 =BMS RS-485 serial termination
2 =CANBUS serial termination

| 46 | Electrical connections |

CANBUS SCI1
NC
02/2024