Xylem Lowara SM30 Manual De Instalación, Funcionamiento Y Mantenimiento página 32

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4.1.1 Group A, B optoinsulated digital inputs
N° Code Description
1 COM Common terminal for ON/OFF digital inputs
2 PR1 Pump 1 control pressure switch
3 PR2 Pump 2 control pressure switch
4 PR3 Pump 3 control pressure switch
5 TERM Thermal protection / PTC pump 1
1
6 TERM Thermal protection / PTC pump 2
2
7 TERM Thermal protection / PTC pump 3
3
8 AUX1 Auxiliary contact 1, configurable as max. pressure pressure-switch or
external auto-test command
9 AUX2 Auxiliary contact 2, configurable as external consent (NO) or external alarm
(NC).
10 AUX3 Auxiliary contact 3, configurable as change set (NO) or CONV.L.SWITCH
(Minimum Pressure Switch)
Characteristics: Threshold OFF= current with input closed = 4mA
4.1.2 Group C, relay output and output+12Vdc
N° Code Description
11 NO Alarm Relay / Solenoid valve contact output, 30 Vac max 1 A
12 COM Alarm Relay / Solenoid valve common output
13 +12Vdc Alarm Output +12 Vdc, 50 mA
14 GND Alarm Output +12 Vdc, ground
4.1.3 Group D, pump relay control
N° Code Description
15 P1 Pump 1 contactor control relay output
16 P2 Pump 2 contactor control relay output
17 P3 Pump 3 contactor control relay output
18 COM Pump control circuit common output
Contact characteristics: 30 Vac max 1A
4.1.4 Group E, RS485 user interface
N° Code Description
19 A RS485 Field bus com.
20 B RS485 Field bus com.
21 GND Ground
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