Manual

7
■ N-42
CONNECTING THE POWER SUPPLY
24V DC IN
24 VDC
N.C. N.C. N.C.
+
+
–
■ N-48
24V DC OUT 24V DC IN
RS-485
24 VDC
++
+
––
SG + –
Connect a 24 VDC power supply to the 24 V DC IN terminal.
Since the 24 V DC IN and 24 V DC OUT terminals are connected internally, the 24 V DC OUT terminal
can be used as a 24 VDC power output terminal.
• Make sure that a 24 VDC power supply is connected. Using any other power supply may damage
the unit.
• Do not connect power supplies with different voltages to the 24 V DC IN and 24 V DC OUT
terminals. The potential difference between both power supplies may cause abnormal operation.
If your system must meet the UL standards, use a “NEC CLASS 2” power supply for supplying 24
VDC power to these units.
CAUTION