Cole Parmer 16 Series, Руководство по эксплуатации

Страница: 8 / 41

8
Analog Input Signal
Apply analog input to Pin 4 as shown in Figure 1.
Unless ordered otherwise, 0-5 Vdc is the standard analog input signal. Apply the 0-5 Vdc input signal
to pin 4, with common ground on pin 8. The 5.12 Vdc output on pin 2 can be wired through a 50K ohm
potentiometer and back to the analog input on pin 4 to create an adjustable 0-5 Vdc input signal source
as in Figure 2 below.
7
6
5
4
3
2
1
8
5.12 Vdc
50 KOhm
Potentiometer
0-5 Vdc
Figure 2. Simple Method for Providing Set-Point to Controllers
Optional 0-10 Vdc: If specified at time of order, a 0-10 Vdc input signal can be applied to pin 4, with
common ground on pin 8.
Optional 4-20 mA: If specified at time of order, a 4-20 mA input signal can be applied to pin 4, with
common ground on pin 8.
RS-232 Digital Input Signal
If you will be using the RS-232 output signal, it is necessary to connect the RS-232 Output Signal (Pin
5), the RS-232 Input Signal (Pin 3), and Ground (Pin 8) to your computer serial port as shown in Figure
3.
Adapter cables are available from Cole-Parmer (see Accessories page 41)
or they can be constructed
in the field with parts from an electronics supply house. In Figure 3, note that the diagrams represent
the “port” side of the connections, i.e. the connector on top of the gauge and the physical DB-9 serial
port on the back of the computer. The cable ends will be mirror images of the diagram shown in Figure
4. (See page 22 for details on accessing RS-232 output and input.)
RS-232 Digital Output Signal
If you will be using the RS-232 output signal, it is necessary to connect the RS-232 Output Signal
(Pin 5), the RS-232 Input Signal (Pin 3), and Ground (Pin 8) to your computer serial port as shown in
Figure 3. Adapter cables are available from the manufacturer or they can be constructed in the field with
parts from an electronics supply house. In Figure 3, note that the diagrams represent the “port” side of
the connections, i.e. the connector on top of the gauge and the physical DB-9 serial port on the back of
the computer. The cable ends will be mirror images of the diagram shown in Figure 3. (See page 23 for
details on accessing RS-232 output.)