AccuEnergy Acuvim II AXM-IO1 User manual

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Copyright © 2007 V1.0
This manual may not be reproduced in whole or in part by any means, without
written permission of Accuenergy.
The information contained in this document is believed to be accurate at the
time of publication, however, Accuenergy assumes no responsibility for any
errors which may appear here and reserves the right to make changes without
notice. Please ask the local representative for latest product specications
before ordering.

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Please read this manual carefully before doing installation, operation and
maintenance of Acuvim II meter.
Following symbols are used in this user’s manual and on Acuvim II meter to
alert the dangerous or to prompt in the operating or set process.
Dangerous symbol, Failure to observe the information may result in
injury or death.
Alert symbol, Alert the potential dangerous. Observe the
information after the symbol to avoid possible injury or death.
This mark is on product for UL Listed product
Installation and maintenance of the Acuvim II meter should only be performed
by qualified, competent personnel that have appropriate training and
experience with high voltage and current device.
This document is not fit for any untrained people. Accuenergy is not
responsible for any problem happens under proper operation.

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Content
Chapter 1 Introduction-----------------------------------------------------------------1
1.1 The Purpose of IO Modules-------------------------------------------2
1.2 The Properties of IO Modules-----------------------------------------4
1.3 List of functions of IO Modules---------------------------------------4
Chapter 2 Installation-------------------------------------------------------------------5
2.1 Appearance and Dimensions-----------------------------------------6
2.2 Installation Method----------------------------------------------------6
2.3 Wiring of IO modules--------------------------------------------------8
Chapter 3 Function of IO Modules---------------------------------------------------17
3.1 Detection of remote signals-----------------------------------------18
3.2 Counter of Pulses-----------------------------------------------------23
3.3 Relay output-----------------------------------------------------------26
3.4 Digital output----------------------------------------------------------28
3.5 Analog Output---------------------------------------------------------30
3.6 Analog Input-----------------------------------------------------------33
Appendix ---------------------------------------------------------------------------------37
Appendix A Technical Data and Specication of IO Modules-------------------38
Appendix B Ordering Information---------------------------------------------------40
Appendix C Revision History---------------------------------------------------------41

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Starting!
Congratulations!
You have gotten an advanced, versatile, multifunction power meter. You can
call it Remote terminal unit (RTU), and it will benet your power system.
The manual is about IO modules of Acuvim II meter, which can extend Acuvim
II meter’s functions largely.
Please read this manual carefully before operating or setting the Acuvim II
meter to avoid unnecessary trouble. You can read part of this manual depends
on how you use the Acuvim II meter and IO modules.
Chapter 1 helps you understand the fundamental function and application
area of IO modules.
Chapter 2 describes in detail installation and wiring of IO modules.
Chapter 3 tells you the functions of IO modules and parameter setting method.
Appendix lists the technical data and specication and ordering information.

Chapter 1 Introduction
The Purpose of IO Modules
The Properties of IO Modules
List of Functions of IO Modules
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1.1 The Purpose of IO Modules
Acuvim II meter does not have any IO functions itself, but it can realize
multi IO functions with IO modules, such as digital input, counter of
pulses, relay output, analog output, and analog input and so on.
There are three types of IO modules, AXM-IO1, AXM-IO2 and AXM-IO3.
According to the difference in communication with Acuvim II meter, each
type of IO module also has two modes, sub address 0 and sub address 1.
That is, two of each type of IO module, one is sub address 0 and another
is sub address 1, can be linked to Acuvim II meter at one time.
AXM-IO1 module, which is adapted to low voltage power distribution, is
composed of:
6 digital inputs (DI), each digital input can be used to detect remote
signals, or be used as a counter of input pulses. When it is used to detect
remote signals, it also can enable SOE(sequence of events), recording the
event and time of the event.
2 relay outputs (RO), it can work in controlling mode, or work in alarm
mode. Both of 2 relay outputs work in the same mode. When it works
in controlling mode, it has two optional output modes, latching mode
and pulse mode. When it works in alarm mode, it has only one latching
output mode.
24V isolated power supply; it is used as an auxiliary power supply for
digital inputs.
AXM-IO2 module, which is adapted to factory DCS (or processing
controlling, BA), is composed of:

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4 digital inputs (DI), each digital input can be used to detect remote
signals, or be used as a counter of input pulses. When it is used to detect
remote signals, it also can enable SOE(sequence of events), recording the
events and time of the events.
2 analog outputs (AO), it can output analog voltage or analog current.
When it outputs analog voltage, the range of voltage is from 0 to 5V or
from 1 to 5V. When it outputs analog current, the range of current is
from 0 to 20mA or from 4 to 20mA.
2 digital outputs (DO), it can work in alarm mode, or work in energy pulse
output mode. Both of 2 digital outputs work in the same mode. When it
works in energy pulse output mode, it can output various types of energy.
AXM-IO3 module, which is adapted to electrical devices, is composed of:
4 digital inputs (DI), each digital input can be used to detect remote
signals, or be used as a counter of input pulses. When it is used to detect
remote signals, it also can enable SOE(sequence of events), recording the
events and time of the events.
2 relay outputs (RO), it can work in controlling mode, or work in alarm
mode. Both of 2 relay outputs work in the same mode. When it works
in controlling mode, it has two optional output modes, latching mode
and pulse mode. When it works in alarm mode, it has only one latching
output mode.
2 analog inputs (AI), it can detect input analog voltage or analog current.
When it detects input analog voltage, the range of voltage is from 0 to
5V or from 1 to 5V. When it detects input analog current, the range of
current is from 0 to 20mA or from 4 to 20mA.

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1.2 The Properties of IO Modules
Extensibility: by linking IO modules, Acuvim II meter can extend variable
IO functions.
Practicability: IO modules can be easily linked to Acuvim II meter.
1.3 List of Functions of IO Modules
Functions AXM-IO1 AXM-IO2 AXM-IO3
Detection of remote signals ●●●
Recording of SOE ●●●
Counting of input pulses ●●●
Output remote controlling by relay ● ●
Output alarm by relay ● ●
Output alarm by digital output ●
Output power pulses by digital output ●
Analog output ●
Analog input ●
24V isolated voltage output ●

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Chapter 2 Installation
Appearance and Dimesions
Installation Method
Wiring of IO Modules
5

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2.1 Appearance and Dimensions
Figure 2-1 shows a structure conguration of IO module.
Figure 2-1 structure conguration of IO modules
2.2 Installation Method
Environmental
Please check the environment temperature and humidity to ensure the
satisfaction of Acuvim II meter and IO modules requirement before the
①Enclosing ⑤Installation screw
②Wiring Terminals ⑥Counterpart of clip
③Linking pins ⑦Installation clip
④Linking socket
①
②
③
⑤
⑥
90mm
55.6mm
④
⑦
⑤
②
19.5mm

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meter installation.
Temperature
Operation: -25℃to 70℃
Storage: -40℃to 85℃
Humidity
5% to 95% non-condensing.
Position
Acuvim II meter and IO modules should be installed in dry and dust free
environment and avoid heat, radiation and high electrical noise source.
Installation Method
With the link pins, IO modules are linked to Acuvim II meter and each
other. The maximum number of extended modules linked to Acuvim II
meter, including IO module, Ethernet module and PROFIBUS module, is
three.
1. Insert the installation clips to the counterpart of Acuvim II meter, and
then press the IO module lightly, so linking is established.
2. Tighten the installation screw.
3. Install other IO modules by the same way.
Note: 1. lightly in installation or it may cause damage to the IO modules;
2. Installation with power is forbidden.

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Figure 2-2 Installation of IO modules
2.3 Wiring of IO Modules
Terminal strips of AXM-IO1 module:
Figure2-3 Terminal strips of AXM-IO1 module
DI1 to DIC: digital input terminals, where DIC is the common terminal for
DI1 to DI6 circuits.
RO1 to ROC: relay output terminals, where ROC is the common terminal
for RO1 and RO2 circuits.
V24+ and V24-: auxiliary voltage supply terminals.
Terminal Strips of AXM-IO2 Module:
DI4DI3DI2DI1 DI5 DI6 DIC RO1 RO2 ROC V+ V–
Digital Input VDCRelay Output

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Figure2-4 Terminal strips of AXM-IO2 module
DI1 to DIC: digital input terminals, where DIC is the common terminal for
DI1 to DI4 circuits.
AO1+, AO1-, AO2+, AO2-: analog output terminals.
DO1 to DOC: digital output terminals, where DOC is the common
terminals for DO1 to DO2.
Terminals strips of AXM-IO3 module:
Figure2-5 Terminal strips of AXM-IO3 module
DI1 to DIC: digital input terminals, where DIC is the common terminal for
DI1 to DI4 circuits.
RO1 to ROC: relay output terminals, where ROC is the common terminal
for RO1 and RO2 circuits.
AI1+, AI1-, AI2+, AI2-: analog input terminals.
Sequence of DI, RO, DO, AO, AI in IO modules:
Digital Input Digital OutputAnalog Output
DI4DI3DI2DI1 DIC AO1+ AO1 – AO2+ AO2– DO1 DO2 DOC
Digital Input AnalogInputRelay Output
DI4DI3DI2DI1 DIC RO1 RO2 ROC AI1+ AI1– AI2 + AI2 –

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DI Sequence: AXM-IO11 (AXM-IO1 module in sub address 0):DI1-6
AXM-IO21 (AXM-IO2 module in sub address 0):DI7-10
AXM-IO31 (AXM-IO3 module in sub address 0):DI11-14
AXM-IO12 (AXM-IO1 module in sub address 1):DI15-20
AXM-IO22 (AXM-IO2 module in sub address 1):DI21-24
AXM-IO32 (AXM-IO3 module in sub address 1):DI25-28
RO Sequence: AXM-IO11 (AXM-IO1 module in sub address 0):RO1-2
AXM-IO31 (AXM-IO3 module in sub address 0):RO3-4
AXM-IO12 (AXM-IO1 module in sub address 1):RO5-6
AXM-IO32 (AXM-IO3 module in sub address 1):RO7-8
DO Sequence: AXM-IO21 (AXM-IO2 module in sub address 0):DO1-2
AXM-IO22 (AXM-IO2 module in sub address 1):DO3-4
AO Sequence: AXM-IO21 (AXM-IO2 module in sub address 0):AO1-2
AXM-IO22 (AXM-IO2 module in sub address 1):AO3-4
AI Sequence: AXM-IO31 (AXM-IO3 module in sub address 0):AI1-2
AXM-IO32 (AXM-IO3 module in sub address 1):AI3-4
Wiring of Digital Input Circuit:
There are 6 digital input circuits, 4 digital input circuits and 4 digital
input circuits in AXM-IO1, AXM-IO2 and AXM-IO3 modules respectively. The
digital input circuit can be used to detect remote signals, or be used as a
counter of input pulses.

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Figure 2-6 schematic diagram of digital input circuit
The circuit drawing of digital input is simplied as gure 2-6. When K is
switched off, OUT is in high state. When K is switched on, OUT is in low
state.
Auxiliary power supply for the digital input is 20-250 Vad/Vdc. The max
current in the loop line is 2mA.
The wire of digital input should be chosen between AWG22~16 or 0.5~
1.3mm2.
Wiring of Relay Output Circuit:
There are 2 relay output circuits in AXM-IO1 and AXM-IO3 modules
respectively. The relay output circuit can work in controlling state,
or work in alarm state. When it works in controlling state, it has two
optional output modes, latching mode and pulse mode. When it works in
alarm state, it has only one latching output mode.
Relay type is mechanical Form A contact with 3A/250Vac or 3A/30Vdc. A
mediate relay is recommended in the output circuit as in gure 2-7.
Electrical
Adjuster
VCC
ROUT
20～250VAC/DC
KDIn
DIC
IO module
Optical
coupler

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Figure 2-7 schematic diagram of relay output circuit
The wire of relay output should be chosen between AWG22~16 or
0.5~1.3mm2.
Wiring of Digital Output Circuit:
There are 2 digital output circuits in AXM-IO2 module. The digital output
circuit can work in alarm state, or work in energy pulse output state.
Digital output circuit form is Photo-MOS. The simplified circuit is as
gure 2-8.
Figure 2-8 schematic diagram of digital output circuit 1
DO
n
DOC
Internal
control node
J
Auxiliary
power supply
Photo-MOS
OUT
IO module
ROn
ROC
mediate relay
Auxiliary
power supply
coil control
output

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When J is in low state in gure 2-8, OUT is in low state. When J is in high
state, OUT is in high state too. So OUT can output pulse signals under the
control of J.
The max output voltage and current of digital output circuit are 250V and
100mA respectively.
Another drawing of the alarming output with beeper is as gure 2-9.
Figure 2-9 schematic diagram of digital output circuit 2
The wire of digital output circuit should be chosen between AWG22~16 or
0.5~1.3 mm2.
Wiring of Analog Output Circuit:
There are 2 analog output circuits in AXM-IO2 modules. The terminals of
the analog output circuits are AO1+, AO1- and AO2+, AO2-. The analog
output circuit can convert anyone of 30 electrical quantities, which is
selected by user, to analog voltage or current. The analog output circuit
supplies 4 output modes, including 0 to 20mA mode, 4 to 20mA mode, 0 to
5V mode and 1 to 5V mode.
The simplied circuit is as gure 2-10.
J
Internal
control node
Photo-MOS
DO
n
DOC
Auxiliary
power supply

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Figure 2-10 schematic diagram of analog output circuit
The Load Capability of Analog Output Circuit:
0 to 20mA mode: the max load resistance is 500Ω.
4 to 20mA mode: the max load resistance is 500Ω.
0 to 5V mode: the max load current is 20mA.
1 to 5V mode: the max load current is 20mA.
Wiring of Analog Input Circuit:
There are 2 analog input circuits in AXM-IO3 modules. The terminals of
analog input circuit are AI1+, AI1- and AI2+, AI2-. The analog input circuit
supplies 4 input modes, including 0 to 20mA mode, 4 to 20mA mode, 0 to
5V mode and 1 to 5V mode.
The simplied circuit is as gure 2-11.
VCC
VO load
VCC
VO
load
R R2
R1
Current analog output Voltage analog output
AO+
AO- AO+
AO-