Distribution Rack Control Board - Elsteam EHPN Series Operating And Maintenance Manual

6.5.2 Distribution rack control board

Power supply
TERMINALS
1-2 24 Vac power supply
1-3 Output L1: throttling solenoid valve
1-4 Output L2: throttling solenoid valve
1-5 Output L3: throttling solenoid valve
6-7 Output Out4:rackinletsolenoidvalve
8-9 Output Out5:rackoutletsolenoidvalve
10...12 Digital output: alarm
13-14 No connection N.C.
20-21 Digital input: enable (CV)
22-23 No connection N.C.
24-25 Digital input: humidistat (CFG=0-1)(S0)
924EHPNE4.01 - EHPN series humidifiers
S2 S3
S0 S1
Out4
Fig. 33. Electrical connections for the distribution rack control board
Intrabus
RS-485
Out5 Out6
26-27 No connection N.C.
28...30 Input S2: main humidity sensor
31...33 Input S3: humidity limit sensor
34...37 Connection to the EV3K interface
38...40 RS-485 serial line connection for BMS Modbus
41...44 CANBUS serial line connection to the pump unit control board
45-46 No connection N.C.
47...50 Connection to the 7-branch expansion board
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
| 47 | Electrical connections |
CANBUS SCI1
NC
02/2024