3 Commissioning
3.9 Configuring the analog expansion unit
Control Relay easy800
11/11 MN04902001Z-EN
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Wiring digital inputs/outputs
The digital inputs R1 - R3 and digital outputs S1/S2:
•
do not have to be activated in the configuration.
•
can always be wired in the circuit diagram.
•
can be used parallel to every configured analog input/output
Digital inputs R1 - R3
The digital inputs R1 - R3 of the analog expansion inputs are used in exactly
the same way as the digital expansion units.
The state of the digital input R1 is evaluated by the hardware. To use the
digital inputs R2/R3 you have connected the two analog 0 - 10 V inputs
(terminal 2 and 7). Their state is evaluated by the software. The expansion
device outputs a 0 signal on R2/R3 if the voltage goes below 8 V DC or
outputs a 1 if this voltage is exceeded.
Digital outputs S1, S2
The digital outputs S1 and S2 of the analog expansion units are used in
exactly the same way as the digital expansion units.
Diagnostics of an analog expansion unit
Table 10: Group fault messages of the analog expansion units
Diagnostics contact
Fault on 1 state
Meaning of group message
(with identical measuring processes, the same fault can be present at two
analog inputs or outputs).
R13
Wire breakage on at least one analog input for measuring 4 - 20 mA current.
With current measuring activated the fault message can only appear if a current
< 3 mA is present.
R14
Wire breakage on at least one PT100 input for temperature measuring.
The fault message can only appear with PT100 measuring activated.
R15
Short-circuit at analog output 0 - 10 V.
R16
Short-circuit at one or more digital outputs.
