24
MAINT
Maintenance (+)
IN
25
MAINT
Maintenance (-)
IN
J21 Analog beacon level input
Connector Type: D-Sub9 female The ACU19V2 preferably is used together with the sat-nms
LBRX beacon receiver. With the sat-nms LBRX the ACU talks though UDP or TCP over IP, no
additional cabling is required in this case. At J21 the ACU19V2 provides an analog interface to
third party beacon receivers.
pin
signal
description
type
2
IN+
Analog In (0..10V)
IN
3
IN-
Analog In GND
OUT
7
SHLD
Shield
J6, J7 and J8 Polarisation and Az/ El Angle encoders
Connector Type: J7,J8 D-Sub25 male, J6 D-Sub9 male The sat-nms ACU19V2 provides the
possibility to connect two different types of angle encoders at the azimuth and elevation axis:
optical SSI encoders (S) and Resolvers (R). The polarisation axis is always a Resolver (R) type
You have to decide at point of order which variant you want to have. The angle encoder type is
specified by an add-on to the name of the unit. The sequence is azimuth, elevation, polarisation
An example: ACU19V2-SSR contains SSI interfaces at azimuth and elevation axis and an resolver
interface at polarisation axis.
SSI encoder interface J7, J8 The SSI positional encoder may be powered from the ACU
internal power supply. +24V is provided as standard at the connector. To avoid ground loops, the
cable shield should be connected either to pin xxx at the ACU or to the ground at the encoder
housing, never at both ends. The power supply outputs are internally fused. Be aware not to
cause a short circuit. If this happens, the unit has to be opened and the fuse has to be replaced.
Do not open the unit by yourself, you will loose warranty in that case.
pin
signal
description
type
15
Clk+
SSI clock
OUT
16
Clk-
SSI clock
OUT
17
SHLD
Shield
21
Data+
SSI data
IN
22
Data-
SSI data
IN
23
SHLD
Shield
24
+24V
encoder power supply
25
0V
Resolver interface J7, J8 The ACU resolver interface is designed for resolvers with an
impedance of 100 Ohms or more and transfer factor 0.5. The interface applies 4Veff / 2000Hz to
the resolver drive coil. It expects 2Veff at the sine / cosine inputs at the maximum positions.
(C) 2022, SatService GmbH
www.satnms.com
ACU-19V2-UM-2209 Page 11/65
