Parameter
Range
PSM3.1 1 supply voltage high
Enable
Not enabled, Enabled
Enabled
Alarm action
Warning
13.3.7 Power supply voltage as an analogue output
You can configure an analogue output with a function for the power supply voltage. The controller then adjusts the analogue output
to reflect the operating value.
Assign the function to an analogue output under
Configure > Input/output
. Select a hardware module with an analogue output,
then select the output to configure.
Table 13.11
Power supply voltage function
Function
I/O
Units
Details
Hardware > Power supply > PSM3.1
1 > PSM3.1 1 supply voltage [V DC]
Analogue output 0 to 60 V DC
The controller measures the power supply voltage over
the power supply terminals. The controller uses the
configured curve to convert this value to an analogue
output.
Application
An analogue output with the power supply voltage may be wired to a switchboard instrument to help the operator.
13.3.8 Relay output characteristics
The first relay output (terminals 3,4) on PSM3.1 is reserved for the
Status OK
function. You cannot change the function for this relay.
The two other relay outputs on PSM3.1 are configurable (that is, terminals 5,6 and terminals 7,8 can be assigned any function).
More information
See
Hardware characteristics and configuration
,
General characteristics
,
Relay output characteristics and
configuration
for more information.
13.3.9 Internal communication
The controllers communicate with their extension units using the Ethernet cables and the internal communication ports (OUT and IN,
marked with a red border on the PSM3.1 and PSM3.2). This is type of communication is referred to as
Internal communication
.
For communication redundancy, the extension units can be connected in a ring. If there is a disruption or failure, the DEIF
proprietary ring protocol changes the communication path within 100 milliseconds.
The order that the extension units are wired, determines in which order they appear in the software. The controller the extension
units are connected to is always the first unit in the order.
Internal communication restrictions
•
Up to nine extension units can be connected to each other in each network chain or ring.
•
Only
Network chain
or
Network ring
controller configurations are supported.
◦
Do not connect switches or other non-DEIF network equipment as part of the network chain or ring.
•
The Ethernet cables must not be longer than 100 metres, point-to-point.
•
The Ethernet cables must meet or exceed the SF/UTP CAT5e specification.
Hardware changes that do not activate a Fieldbus conflict alarm
The controller logs the following hardware changes. However, they do not activate a
Fieldbus conflict
alarm:
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