YSI IQ SensorNet 2020 XT Terminal - Manual (Page 176)

Technical data System 2020 XT USB
8 - 2 ba76019e01 12/2012
Warning
A circuit (except for the power supply connections), that is
connected to an IQ S
ENSOR N ET component, must not feed any
voltages or currents that are not allowed. It has to be made sure
that the circuit at any time meets all requirements of a Limited
circuit or Limited Power as well as of SELV (Safety Extra Low
Voltage). These include the following limiting value
specifications:
 AC voltage: max. 30 V effective / 42.4 V peak
 DC voltage: max. 60 V
 Current limit: max. 8 A
 Power output limitation: max. 150 VA
Internal voltage supply Relationship between the supply voltage U, the LED status on the
MIQ module and the log book entries (Fig. 8-1):
Fig. 8-1 Relationship of supply voltage - LED states - log book
LED state Log book
LED yellow No entry (= OK)
LED red 1st error message
Both LEDs off 2nd error message (or switch-off)
U [V]
24
18
16,4
14,4
14,2
LED yellow LED yellow
LEDs off
LED red LED red
LED red
t