P4 - External Fan; J1 - In-Out - Agilent Technologies TV 801 Bedienungshandbuch

17 Technical Information
P4 – External Fan
P4 – External Fan
Figure 9
This is a dedicated 24 Vdc connector to supply the optional external
fan.
A shielded cable with ferrite is shipped with the controller (see
picture). The faston contact has to be connected on the front panel in
order to reduce noise and accomplish the EMC rules.

J1 - In-Out

Figure 10
This connector carries all the input and output signals to remote
control the TV 801 Navigator Bolted Flange.
218/248 TV 801 Navigator Bolted Flange User Manual / 87-900-980-01 (D)