21
NT579-NT579 RS485
TECSYSTEM SHANGHAI
22) ELECTRICAL CONNECTIONS
FIG.2
PT100 INPUTS
RELAYS
POWER SUPPLY
18~36 Vdc
RELAYS CONNECTION
ALARM
TRIP
FAULT
FAN
REAR PANEL
RS485 DIGITAL OUTPUT
50 51
54 55
62 61 60
+
-
Gnd
56 57
Relay fan
contact
ON/OFF
1 2 3
CH L1
WHITE
4 5 6
7 8 9
CH L2
CH L3
RED
RED
52 53
+
-
BE CAREFUL TO CONNECT THE POWER
SUPPLY WITH THE RIGHT POLARITY
41
42
NOTE: when the unit is powered the fault relay 54-55 opens and it closes again in case of fault condition or no power.