Expansion Cable; Acquisition Unit Expansion Cable Connector Pinouts - Honeywell VXP System Maintenance Manual

Repair and Cleaning

5.2.7 Expansion Cable

The expansion cable is used when there is a permanent installation of sensors in the aircraft. Use
of this cable allows even more options and sensors to be used to track and balance the rotors. The
following table shows the pinouts for the expansion cable.
Table 5-8. Acquisition Unit Expansion Cable Connector Pinouts
Pin # Function
1 Isolated Output Port 1
2 Isolated Output Port 2
3 Isolated Input Port 1
4 Isolated Input Port 2
5 Isolated Input Port 3
6 Isolated Input Port 4
7 Isolated Input/Output Return
8 RS-422 TXDH3/232 TXD3
9 RS-422 TXDL3/232 GND
10 RS-422 RXDH3/232 RXD3
11 RS-422 RXDL3
12 CCU2VXP
13 VXP2CCU
14 CCUGND
15 Mag Pickup/Photocell Signal 1
16 Velocimeter Signal (Ch. 1, Velo 9)
17 Ground
18 (+) Vib. Sensor Power
19 (-) Vib. Sensor Power
20 Velocimeter Signal (Ch. 2, Velo 10)
21 Ground
22 (+) Vib. Sensor Power
23 (-) Vib. Sensor Power
24 Velocimeter Signal (Ch. 3, Velo 11)
25 Ground
5-10 Honeywell
Attributes
Isolated 0 to 28 Vdc
Isolated 0 to 28 Vdc
Isolated 0 to 28 Vdc
Isolated 0 to 28 Vdc
Isolated 0 to 28 Vdc
Isolated 0 to 28 Vdc
Chassis Ground/28V Return
Differential 0 to 5 Vdc
Differential 0 to 5 Vdc
Differential 0 to 5 Vdc
Differential 0 to 5 Vdc
0 to 5 Vdc
0 to 5 Vdc
Ground
0.2 to 10 Vac
19 mVac/IPS Velocity
Ground
+8 Vdc
-8 Vdc
19 mVac/IPS Velocity
Ground
+8 Vdc
-8 Vdc
19 mVac/IPS Velocity
Ground