Honeywell DC3300, Руководство пользователя

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Installation
16 UDC3300 Basic Model: DC330B User Manual 5/00
Transmitter Power for 4-20 mA 20 Wire Transmitter—
Using Open Collector Alarm 2 Output
The wiring diagram example shown in Figure 2-16 (Model DC330X-XT-XXX)
provides 30 Vdc at terminals 5 and 6 with the capability of driving up to 22 mA.
If the transmitter terminal voltage must be limited to less than 30 volts, you can
insert a zener diode between the positive transmitter terminal and terminal 5. For
example, an IN4733A zener diode will limit the voltage at the transmitter to 25 Vdc.
5
6
26
27
+
–
2-wire
Transmitter
250 ohm
resistor
+
–
+
–
Zener Diode
Configure:
A2S1TYPE = NONE
A2S2TYPE = NONE
Figure 2-16 Transmitter Power for 4-20 mA 2-wire Transmitter Using Open
Collector Alarm 2 Output—Model DC330X-XT-XXX
Transmitter power for 4-20 mA 20 wire Transmitter—Using Auxiliary Output
The wiring diagram example shown in Figure 2-17 (Model DC330X-XX-2XX or
DC330X-XX-5XX) provides 30 Vdc at terminal 16 with the capability of driving up to
22 mA.
If the transmitter terminal voltage must be limited to less than 30 volts, you can
insert a zener diode between the positive transmitter terminal and terminal 16. For
example, an IN4733A zener diode will limit the voltage at the transmitter to 25 Vdc.
16
17 26
27
+
–
2-wire
Transmitter
250 ohm
resistor
+
–
+
–
Zener Diode
Configure:
AUX
OUT=OUTPUT
Auxiliary Output Calibration:
ZERO VAL = 4095
SPAN VAL = 4095
Figure 2-17 Transmitter Power for 4-20 mA 2-wire Transmitter Using Auxiliary
Output—Model DC330X-XX-2XX or DC330X-XX-5XX