MS20/MS30 MS20/MS30
Release 10 07/2012
43
2.1.9
Terminal block for supply voltage and signal contact
The supply voltage and the signal contacts are connected via a 4-pin terminal
block and a redundant 4-pin terminal block with a snap lock.
Supply voltage
Redundant power supplies can be used. Both inputs are uncoupled.
There is no distributed load. With redundant supply, the power supply unit
supplies the device only with the higher output voltage. The supply
voltage is electrically isolated from the housing.
Note:
With non-redundant supply of the mains voltage, the device reports
a power failure. You can prevent this message by applying the supply
voltage via both inputs, or by changing the configuration in the
Management.
Signal contacts
The signal contact monitors proper functioning of the device, thus
enabling remote diagnostics. You can specify the type of function
monitoring in the Management.
You can also use the switch Web page to switch the signal contact
manually and thus control external devices.
A break in contact is used to report the following conditions via the
potential-free signal contact (relay contact, closed circuit):
The detected inoperability of at least one of the two voltage supplies
(voltage supply 1 or 2 is below the threshold value).
A continuous detected error in the device (internal supply voltage).
The detected error of the link status of at least one port. The report of
the link status can be masked by the Management for each port. In the
default state, link status monitoring is deactivated.
The temperature of the device is outside the range specified in the
threshold values.
The removal of the ACA.
Summary of Contents for MICE MS20
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