AMC SIR Series Руководство по эксплуатации - Страница 11
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Печатать страницуAMC-SIR Refrigerant Gas Sensor/Transmitter
TRANSMITTER HOUSING REMOVED FOR CLARITY
TB1
TO
TRANSMITTER
J1
LED1
POWER
NOTE:
ALL WIRING MUST PASS THROUGH CONDUIT OPENING
LOCATED AT THE BOTTOM OF ENCLOSURE.
REFER TO FIGURE 4-1
4.2.1.3 TRANSMITTER CURRENT OUTPUT
When using a non AMC monitor, AMC-SIR Refrigerant Gas sensor/transmitter is connected as
shown in Fig. 4-5. If necessary, the output current may be converted to a linear voltage signal in
order to measure the signal. To accomplish this, a high-precision resistor must be connected to
the current input of the non AMC monitor as a shunt. See Fig. 4-6.
The resultant voltage drop across the resistor then linearly reflects the concentration value of
the measured gas. Depending on the operating current setting, the following values for the
output voltage can be established:
4-20mA
0.4V – 2.0V with a 100 Ω load resistor
4-20mA
1.0V – 5.0V with a 250 Ω load resistor
4-20mA
2.0V – 10.0V with a 500 Ω load resistor
TP1
V+
TP2
SIG
TO MONITOR
TP3
GND
Figure 4-4 Transmitter to Monitor Wiring Diagram
TB2
CHG
RS-
SHIELD
RS+
V+
SigV
Ret
GND
9
+
AMC
S
MONITOR
-
CHASSIS GND