User Guide | Monitoring unit, type PR-OCTO
4 | BC391624209008en-000201
© Danfoss | Climate Solutions | 2022.04
4. Connections and wires
The PR-OCTO requires two connections, one for the power supply, the other with the electronic
thermostat.
The power supply must be shared with the electronic thermostat: the PR-OCTO must be powered on
only when the thermostat is also powered on. If the PR-OCTO is powered on when the thermostat is
off, a “Controller communication failure” alarm is raised after 60 minutes.
Note:
Neither the cables nor the connectors are included in the PR-OCTO package.
For the POWER SUPPLY connector of the PR-OCTO, either two standard fast-on connectors or one
connector with screw terminal can be used. In Fig 4, illustrates the Lumberg 3611 02 K1, an easy plug
connector with lift clamp and protection against misplacing and fast assembling. Neither the easy
plug connector nor the standard fast-on connectors are included in the PR-OCTO package.
Note:
If the power supply cable is not double insulated, it must be physically separated from the
COMM cable.
Concerning the COMM Cable (the communication cable between the PR-OCTO and the electronic
thermostat) a specified cable must be used depending on the specified thermostat.
The COMM Cable could be either assembled by the cooler manufacturer or could be purchased from
Danfoss (see COMM table for details).
For other options on cabling and connection to different controllers, please contact Danfoss.
Fig. 3: Wiring details
C
Electronic Thermostat
OCTO
100 – 240 V AC ~
COMM Cable
This distance has to be at least 5 cm in case
the power supply is not double insulated
Danfos
s
80G43
5
Standard fast-on
Easy plug double fast-on
(for indirect mating)
Fig. 4: Two possible OCTO terminations for the power supply cable.
The one on the right is the Lumberg 3611 02 K1.
Table 3: COMM cables for Danfoss controllers
Controller
Length
Code no.
ERC11x
0.6 m
080G3396
ERC11x
2 m
080G3388
ERC11x
4 m
080G3389
EETa
2 m
080N0330
EETa
4 m
080N0331
