Rockwell-automation 61C365 4 Output 4-20mA Analog Rail Uživatelský manuál stáhnout pdf (Strana 14)

2Ć4

DAC

RFB

+10.000 V

IĆOUT

104.167

0.416

2.083 V

I-OUT

Figure 2.2 Ć Typical Output Circuit

The Analog Rail module is factory calibrated and requires no

offset/gain adjustment. All four analog output channels are

referenced to the same common. This common is isolated from

both the external power supply and the I/O port connection.

The module incorporates extensive diagnostics. In Rail mode, check

bits are monitored for accuracy on every transfer of data between

the processor and the module. In Local Head mode, parity bits are

monitored for accuracy on every transfer of data. A Rail fault LED on

the processor, Remote Head, or Local Head will be illuminated if the

check bits or parity bits are wrong and all transmission will stop after

n retries, where n is a value determined by the host's software

(averagen=4forAutoMax; AutoMaten=2).

In the event of a rail fault, all outputs will be set to 0. The COM OK"

LED on the module will go off. If any power required by the module,

i.e., the +5 Volts from the I/O port required for communication, the

external power supply, or the power required by the Analog Output

section, is not within specified limits, all outputs will be set to 0 and

the PWR OK" LED will go off.

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Rockwell-automation 61C365 4 Output 4-20mA Analog Rail Uživatelský manuál Strana 14