Service manual

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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
Table 3-3. Analog Outputs
Board I/O # Description Type
10 1 Compressor VFD 4-20 mA
10 2 Condenser / Remote Oil Cooler VFD 4-20 mA
10 3 % Slide Valve Position 4-20 mA
10 4
Motorized Valve (Cool Compression or Liquid
Injection), V+
4-20 mA
10 5 Auxiliary Output #1 4-20 mA
10 6 Auxiliary Output #2 4-20 mA
10 7 Auxiliary Output #3 4-20 mA
10 8 Auxiliary Output #4 4-20 mA
Figure 3-2. Digital I/O Board Layout
Section 3 • Hardware Architecture
Board I/O # Description Type
9 28 Auxiliary #12 0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9 29 Auxiliary #13 0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9 30 Auxiliary #14 0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9 31 Auxiliary #15 0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9 32 Auxiliary #16 0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
Table 3-2. Analog Inputs (2 of 2)
Digital & Analog I/O Boards Layout
It is important to install the boards in the proper layout.
For the correct digital and analog input/output (I/O)
board layout, see Figure 3-2. Digital I/O Board Layout.
Dipswitches
• Each board has a dipswitch which sets its communi-
cations address so that it can communicate with the
CPU board. The dipswitch settings must be correct
or the I/O will not function.
Jumpers
• Jumpers are required on the analog boards to con-
fi gure them for the type of sensors used. The jumper
table for the analog board shows the optional jump-
er confi gurations for sensors other than the default
Vilter standard. If a different sensor is to be used, the
jumpers on the analog board need to be changed. In
addition, the confi guration for this sensor must be
changed in the Instrument Calibration screen. The
following illustrations show the Vilter default con-
fi gurations for the Vission 20/20.