ACR Electronics SmartReader Plus Manual do Utilizador Página 69

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SmartReader Data Logger
61
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Rate Select Table
Equation
Number
Counting
Mode
Rate Select Setting
(Pulse/Sec.)
Maximum
Pulses
Equation Coding
31
A
32
256
answer0 = source0
32
A
64
512
answer0 = source0 * 2
33
A
128
1024
answer0 = source0 * 4
34
N
32
256
answer0 = source0 / 8
35
N
64
512
answer0 = source0 / 4
36
N
128
1024
answer0 = source0 / 2
1.11.7 Specifications
Pulse Inputs (General)
Standard Ranges: 32, 64, and 128 pulses/second.
Resolution: 8 bits
Accuracy: 32 Hz Channel: ±1 pulse/8 seconds
64 Hz Channel: ±2 pulses/8 seconds
128 Hz Channel: ±4 pulses/8 seconds
Maximum Voltage: ±40 volts (reverse polarity protected)
Connections: Removable screw-type terminal strip with single common (-)
connection
Totalizing: Eight seconds. Average pulse frequency over this period
must not exceed the channel range or counting will restart
from zero.
Minimum Pulse width: 4 milliseconds
Input Types:
Contact: Uncommitted ("dry") switch or relay contacts (internally
generated pulses). Switches with gold-plated sealed contacts
are recommended.
Excitation: 5 microamps contact current, 3.5 volts open circuit
Logic: Active logic signals
Input Voltage Low = 0 to 0.5 volts (DC)
High = 4.5 to 24 volts (DC)
Input Impedance: 750k ohms
Specifications are subject to change without notice.
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