Contemporary-control-systems BASremote User Manual (firmware 3.1.x) Manual de usuario descargar pdf (Pagina 25)

TD040300-0MF

each of the opto-isolators is rated for 60 VDC, install a 100 kΩ pull-up resistor between

each output and the +24 V loop supply. The common of the opto-isolators connects to

the common of the BAS Remote. Since each BAS Remote input has a 100 kΩ input

impedance, the resulting voltage divider sets the off-state voltage to 12 V. Even though

the BAS Remote input range is 0–10 VDC, this will not harm it. Set the two thresholds

to 2 V and 3 V. The threshold points on digital signals are not critical. Consult the pulse

device manual for more guidance.

5.5 Analog Input

An analog input can measure voltage in the range of 0–5 VDC or 0–10 VDC or it can

measure current in the range of 0–20 mA. Transmitters that produce an elevated “zero”

such as 1–5 VDC, 2–10 VDC or 4–20 mA can be measured as well. Using the web

page, configure the input for either voltage or current and select an appropriate range.

Scaling the input is accomplished by assigning the low and high points to engineering

units. When set as a voltage input, the input impedance is 100 kΩ and for a current

input, the impedance is 250 Ω.

With voltage measurement, connect the more positive voltage to point B and the less

positive to BAS Remote common as shown in Figure 11. On three-wire devices such

as damper actuators, the output signal is referenced to the damper’s power supply

common. That common must be at the same reference as the BAS Remote common.

Notice the connections in the diagram. In this situation it is only necessary to attach the

transmitter output to point A on the BAS Remote input.

Figure 11 — Analog Input Connections

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Contemporary-control-systems BASremote User Manual (firmware 3.1.x) Manual de usuario Pagina 25