Analog Signal Input
Verbatim Owner's Manual
B-11
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890123456789012345678901212345678901234567890123456789012123456
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
1234567890
a
1234567
1234567
1234567
1234567
1234567
1234567
B.1.9
If Analog Inputs Do Not Work Correctly
Recheck programming settings, especially the Input Signal Type setting. Verify
that the polarity of your input connections is correct.
In the case of 4-20 ma input, does the spoken value always reflect a 0 ma signal
level? If so, the problem is presumably with the connection or the signal source.
Use a DC meter to verify that both sides of the offending input are within 10
VDC of ground. A 4-20 ma current loop input should give a meter reading of
about .07 volt per milliamp of current as measured across the two signal input
terminals.
Are other instruments included in the same current loop? If they read correctly,
temporarily disconnect the input to the Verbatim Autodialer. This should throw
the readings of the instruments off scale. If there is no such effect, your wiring
is not including the Verbatim autodialer in the loop. Verify that the type of
signal source agrees with the physical configuration on the VAN card according
to the marking on the back of the card.
B.1.10
Troubleshooting Analog Grounding Problems for
Verbatim Analog
The most common analog signal type in use in the Verbatim marketplace is
current loops, wherein the signal is a controlled DC current ranging from 4 to
20 milliamperes.
The loop consists of a current transmitter (consisting of a transducer and a
supporting power supply which may or may not be packaged into one unit), and
one or more receiving devices which measure and respond to the current signal
they detect on the loop. The power supply voltage is typically 24 volts DC.
The terms "transducer" and "transmitter" are used interchangeably. The
transmitter's job is to ensure that the current level accurately reflects the
physical parameter which the transducer is measuring (typically a pressure or
liquid level), regardless of what impedance it sees in the loop.
In order to do this, it presents whatever voltage across its terminals is needed to
achieve the correct current flow. This voltage must be great enough to
accommodate the total resistance in the loop. The typical resistance
contribution presented by each receiving device is 250 ohms. However, the DC
resistance presented by the Verbatim analog inputs is around 70 ohms (49.9
ohm precision resistor plus two 10 ohm surge standoff resistors).
In theory, all elements in the loop are isolated from any connection to electrical
ground. This is intended to eliminate concerns about errors in the signal caused
by conflicting ground or other conflicting connections.
Содержание Verbatim
Страница 1: ...Verbatim Owner s Manual Owner s Manual...
Страница 14: ...Overview 1 4 Verbatim Owner s Manual...
Страница 22: ...Installation 2 8 Verbatim Owner s Manual...
Страница 24: ...Programming and Testing 3 2 Verbatim Owner s Manual Front Panel Keys and Indicators Diagram...
Страница 34: ...Recording Voice Messages 4 6 Verbatim Owner s Manual...
Страница 80: ...Using the Alarm Ready Schedule Feature 7 12 Verbatim Owner s Manual...
Страница 82: ...Maintenance Testing and Battery Replacement 8 2 Verbatim Owner s Manual...
Страница 88: ...Verbatim Series SFP Autodialer A 2 Verbatim Owner s Manual Verbatim Series SFP Front Panel Diagram...
Страница 89: ...Verbatim Series SFP Autodialer Verbatim Owner s Manual A 3 Verbatim Series SFP Inside Front Panel ON OFF Switch...
Страница 94: ...Verbatim Series SFP Autodialer A 8 Verbatim Owner s Manual...
Страница 104: ...Analog Signal Input B 10 Verbatim Owner s Manual...
Страница 108: ...Analog Signal Input B 14 Verbatim Owner s Manual...
Страница 110: ...Remote Supervisory Control Output C 2 Verbatim Owner s Manual a RSC Supervisory Remote Control Output Box Diagram...
Страница 114: ...Remote Supervisory Control Output C 6 Verbatim Owner s Manual...
Страница 118: ...Printer Options D 4 Verbatim Owner s Manual...
Страница 126: ...Data Acquisition Central Data Logging E 8 Verbatim Owner s Manual...
Страница 130: ...MODBUS Interface F 4 Verbatim Owner s Manual Electrical Connection Diagram for PLC Network Connection...
Страница 155: ...Cabling Diagrams Verbatim Owner s Manual G 1 G Cabling Diagrams...
Страница 156: ...Cabling Diagrams G 2 Verbatim Owner s Manual G 1 RACO VSER 01 Serial Cable Connection Diagram...
Страница 159: ...Cabling Diagrams Verbatim Owner s Manual G 5 G 4 RACO VMB 2 Serial Cable Connection Diagram Verbatim Verbatim...
Страница 161: ...Cabling Diagrams Verbatim Owner s Manual G 7 G 6 RACO VBB 1 Serial Cable Connection Diagram Verbatim Verbatim...
Страница 162: ...Cabling Diagrams G 8 Verbatim Owner s Manual G 7 VTI 405 505 DCM Serial Cable Connection Diagram...
Страница 166: ...Verbatim Floobydust H 4 Verbatim Owner s Manual DC Power Connection Diagram AJ1 JB8 MINI PLUG...
Страница 174: ...Verbatim Floobydust H 12 Verbatim Owner s Manual Heater Thermostat Mounting and Wiring Diagram...
Страница 183: ...Verbatim Floobydust Verbatim Owner s Manual H 21 Cellularm Cellular Communications Diagram AC Only...
Страница 184: ...Verbatim Floobydust H 22 Verbatim Owner s Manual Cellularm Cellular Communications Diagram 12V DC Only...
Страница 185: ...Verbatim Floobydust Verbatim Owner s Manual H 23 Cellularm Cellular Communications Diagram 24V DC Only...
Страница 188: ...Verbatim Floobydust H 26 Verbatim Owner s Manual Motherboard Component Diagram...
Страница 189: ...Verbatim Floobydust Verbatim Owner s Manual H 27 Jumper Block Diagram...
Страница 192: ...Verbatim Floobydust H 30 Verbatim Owner s Manual...
Страница 200: ...Verbatim Autodialer Specifications I 8 Verbatim Owner s Manual...
Страница 201: ...Worksheets Verbatim Owner s Manual J 1 J Worksheets...
Страница 236: ...Glossary Glossary 8 Verbatim Owner s Manual...
Страница 244: ...Verbatim Owner s Manual...