Signal Selector and Installation
Mode l8500C/8500C+ Operators Manual
3-3
The Signal Selector is part of the 8500C/C+ kit. Although it is not required in order to make full use o
the 8500C/C+, it may be required for those applications that read input signals from more than on
velocimeter or magnetic pickup at a time.
Figure 3-2. Model 8520C Signal Selector
Signal Selector signal channels are labeled on the front panel of the unit. Cha nnels N o.1 through12
accept velocimeter inputs, and channe lsA thr oughD accept FasTrak, magnetic pickup or Photocell
inputs. Also on the right of the front panel are the power conn ector (28Vdc) and a power/output
connector for attachment to an 8500C/C+. Note that when used together with the 8500C/C+, the Signal
Selector supplies all power and communications signals to the 8500C/C+. It is therefore essential that
only a 2 8Vdc power supply be used to operate the Signal Selector. Plugging the Signal Selector into a
power source other than 2 8Vdc may cause severe damage to the instrument.
SIGNAL
SELECTOR
CHADWICK-HELMUTH
E L M O N T E , C A L I F O R N I A
MAGNETIC PICKUP/PHOTOCELL CHANNELS
1
2
3
4
5
6
7
8
9
10
11
12
AB
C
D
VELOCIMETER CHANNELS
VELO
SHORT
POWER
MODEL 8520C
CN_8520..DRW
VIBRATION
CHANNELS
AZIMUTH
CHANNELS
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