Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 32)

Table 1-7. Multichannel Analog Option Specifications
Item Specification(s)
Saftey classification FM Approved: Nonincendive for Class 1, Div. 2, Group A,
B, C, & D hazardous locations.
Non-Isolated Analog Inputs (AI4 - AI7)
Quantity 4
Connection type Track mounted ITB.
Transmitter power Supplied by user to ITB.
Current to voltage resistors Provided on ITB (250 ohm
±
0.1% tolerance).
Current signals:
Signal Range
Measurement accuracy
Voltage measurement accuracy
0 - 21.84 mA
±
0.2% of Full Scale
±
0.1% of Full Scale
Frequency signals:
Signal range
Input impedance
Measurement accuracy
Signal amplitude
Pulse width
9 - 25,000 Hz
47 k ohms in series with a 0.22 MFD capacitor.
±
0.2% of rate
4 - 25 V p-p
20 microseconds minimum
NOTE
The minimum frequency of 9 Hz and minimum voltage of 4 V p-p
assumes the input waveform has a 50% duty cycle. The 53MC5000
Process Control Station frequency inputs are capacitively coupled into
a level sensitive Schmidt Trigger; therefore, the dc bias level of the
signal is not important. If, however, the duty cycle is not adhered to
larger signal amplitudes are required and low frequency accuracy will
degrade.
The following formula is provided to calculate required signal amplitudes for duty cycles other
than 50%:
Required Amplitude
=
|
2
⁄
5
(
% Duty Cycle
−
50
)
|
+
4
If the duty cycle is 50%, then the required amplitude is 4 V p-p.
If the duty cycle is 10%, then the required amplitude is 20 V p-p.
If the duty cycle is 90%, then the required amplitude is 20 V p-p.
Pulse signals:
Signal range
Input impedance
Signal amplitude
Pulse width
Rollover pulse count
0 - 25,000 Hz
47 k ohms in series with a 0.22 MFD capacitor.
4 - 25 V p-p
20 microseconds minimum
10,000,000
Isolated Analog Input (AI8)
This option requires one of the 5B series isolation modules described in Table 1-8.
Quantity 1 (Analog Input 8 - AI8).
Analog-to-digital specifications:
Accuracy
Resolution
±
0.1% Full Scale
12 bits
1 of 2
53MC5000 Process Control Station
1-18