I/O Configuration
Using the Visograph • 49
14.4.3. Digital Outputs
To configure digital outputs, press the T2 key from the
I/O Con-
fig
menu shown above. The DO Configuration screen is now dis-
played:
Press
SET
to change a
DO_Config
. The iPro comes defaulted
with D04=Refrigeration relay, D05=Defrost, D06=Fan and
D07=Lights. Press the T7 key to scroll to relay polarity.
Press
SET
to edit relay polarity and press
SET
again to save. The
table below outlines the relay polarity operation:
14.4.3.1. Digital Output Options
Figure 14-15
- DO Configuration
Figure 14-16
- DO Relay Polarity
Relay Polarity
Logical Value
Physical State of
Relay Contacts
Open
TRUE
Open relay
Close
TRUE
Closed relay
Open
FALSE
Closed relay
Close
FALSE
Open relay
Table 14-3
- Relay Polarity Operation
Digital Input
Description
Hardware Available
Nu
Digital Onput
is not used
N/A
Light
Relay for con-
trolling case/
box lights
iPro or IPX
Fan
Relay for con-
trolling case/
box fans
Defrost
Relay for con-
trolling case/
box defrost
heaters
Refrigeration
Relay for con-
trolling case/
box LLSV
Alarm
Relay for con-
trolling output
of alarm signal
Enable
Auxiliary relay
that is enabled
when
controller is
enabled
Table 14-4
- Digital Outputs
Summary of Contents for iPro
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