SPM90 Single Phase DC Energy Meter

Installation & Operation Manual

V1.6

ZHUHAI PILOT TECHNOLOGY CO., LTD.

 Danger and warning!

This device can be installed only by professionals.

The manufacturer shall not be held responsible for any accident caused by

the failure to comply with the instructions in this manual.

Risks of electric shocks, burning, or explosion

 This device can be installed and maintained only by qualified people.

 Before operating the device, isolate the voltage input and power supply

and short-circuit the secondary windings of all current transformers.

 Use appropriate voltage tester to make sure the voltage has been

cut-off.

 Put all mechanical parts, doors, or covers in their original positions

before energizing the device.

 Always supply the device with the correct working voltage during its

operation.

Failure to take these preventive measures could cause damage to

equipment or injuries to people.

 CONTENTS
1. Product Overview ...................................................................................................................... 1
2. Order Information ...................................................................................................................2
3. Appearance and Installation Dimension ........................................................................ 3
3.1 Outline Dimensional Drawing ............................................................................... 3
3.2 Installation Diagram ................................................................................................. 4
4. Display and Keyboard Instructions ...................................................................................5
4.1 Full Display ................................................................................................................... 5
4.2 Statue Inquiry .............................................................................................................. 5
4.3 Keyboard Instructions .............................................................................................. 5
4.4 Real-time Data Display Procedure ...................................................................... 6
4.5 Power On Display Interface ....................................................................................7
4.6 Parameters Settings .................................................................................................. 9
5. Measurement Capability ....................................................................................................10
5.1 Real-time Basic Electrical Parameters .................................................................10
5.2 Energy Parameters .................................................................................................. 11
5.3 Electric Energy Pulse .............................................................................................. 11
6. Communication ........................................................................................................................12
6.1 Overview ...................................................................................................................... 12
6.2 Communication Media ..........................................................................................13
6.3 Communication Protocol ..........................................................................................13
6.4 Communication Parameters ................................................................................13
6.5 Anti Strong Electricity Function of Communication Port ..................................13
7. Technical Parameters ............................................................................................................ 14
8. Appendix .................................................................................................................................. 16
8.1 Terminals Definition ................................................................................................16
8.2 Typical Wiring Diagram .........................................................................................17
1. Product Overview
SPM90 is designed for scenarios such as DC panel, charging pile and

telecom base stations. This meter series can measure voltage, current, power

and active energy in DC system. Not only can it be used as local display, but it

can also be used in measuring system by connecting with industrial control

equipment and computers. It is a high-performance automation meter that can

work with modern DC power distribution system in industrial and mining

industry, civil building and building automation.

Product performance fully meets the according technical requirements of

GB／T 29318-2012 (Energy measurement of non-vehicle charger of

electrombile) and Class 0.5 of DL/T 1484-2015 (Technical Regulations of DC

energy power).

Main function of this product:

 Real-time measurement of electrical parameters: voltage, current

and power

 Measurement of bidirectional energy

 1CH RS485 communication, 1CH electric pulse output optional.

 Supports MODBUS and DL/T645—2007 communication protocol.

1
2. Order Information

SPM90 - □ - □

① ②

①：Shunt specification (Required)

1 100A Shunt

1.5 150A Shunt

2 200A Shunt

3 300A Shunt

4 400A Shunt

②：Energy pulse (Optional)

P Energy pulse

If shunt in other specifications are needed, please contact us in advance.

Note: When selecting shunt, make sure the the actual current is within 80% of

scale span, preventing the influence on the accuracy on the shunt caused by

long-time large current.

2
3. Appearance and Installation Dimension

3.1 Outline Dimensional Drawing

Unit：mm

36.00 65.00
50.80
100.00

45.00
35.50

Pic. 1 DC meter dimensional drawing

a a

h1
h2
s

c
b

3
SPECS a b c s h1 h2 φ

100A 43±1 116±2 85±1 22±0.5 5.5±0.2 21±0.5 8.5±0.2

150A 43±1 116±2 85±1 22±0.5 5.5±0.2 21±0.5 8.5±0.2

200A 43±1 116±2 85±1 22±0.5 5.5±0.2 21±0.5 8.5±0.2

300A 43±1 126±2 100±1 26±0.5 5.5±0.2 21±0.5 10.5±0.2

400A 43±1 126±2 100±1 38±0.5 5.5±0.2 21±0.5 10.5±0.2

Pic. 2 Dimensional diagram of Shunt

3.2 Installation Diagram

4
4. Display and Keyboard Instructions

4.1 Full Display

There is a one-inch dot matrix LCD with

U 100.0 V
backlight on SPM 90, whose resolution is 128*64.
I 100.00 A
With 2 keys and menu prompt, switching among P 10.00 kW
E 20.125 kWh
different functions can be realized.

Note: Backlight turns off if the meter is left with

no operation for 60s. Backlight will not turn on

unless there is operation again.

4.2 Statue Inquiry

Indicator Color Indicating Indicated message

PULSE Red Flash Electric energy pulse

4.3 Keyboard Instructions

Note: Same keys play different functions if different interfaces.

Switching among equative menu

Exit/Confirm

5
4.4 Real-time Data Display Procedure

Menu tree diagram:

Pic.3 Operation Menu Tree Diagram

Keyboard instruction: Page down among equtive menu Next menu,

confirm button;

Editing Instruction: Editing options

switching Editing option execution.

6
4.5 Power On Display Interface

Data display 2, Main menu interface: Press

U：DC voltage
to select different submenu,
I ：DC current

P：Power
press to enter submenu, as
E : Energy

1、 Startup interface: shown below:

The meter self-examines with

power on, LCD lights up, dot matrix set

info
fully displays, entering into startup

interface 3s later

U 100.0 V
I 100.00 A
P 10.00 kW
E 20.125 kWh 3, Set menu: After entering the set

menu, input the correct password to

enter the Set menu display

Note: Press confirm button to enter interface.

main menu check interface.

7
After inputting password 0001, 4, Info Menu: After entering the

entering submenu. info menu, program version

information, protocol and

protocol equipment information

and device ID can be viewed.

Detailed introduction of Set Menu

will be shown in “4.6 Parameters

Settings”.

8
4.6 Parameters Settings

 Meter Programming 2, Communication Setting: Press

SPM90 can program the following

to enter communication
setting parameters:

Programmable items interface, communication address

Communication protocol and baud rate can be set, as shown

Communication Setting below. Communication address

range:

1, Communication protocol: Press Baud rate can be set: 2400, 4800,

9600, 19200.
to enter the communication

interface, alternatives of

communication protocol can be set.

Communication protocol can be set:

Modbus and DLT645, as shown

below:

9
5. Measurement Capability

5.1 Real-time Basic Electrical Parameters

SPM90 can measure basic electrical parameters including voltage, current

and power.

Real-time reading Measurement range

Current

Shunt 100A 0 ~ 100A

Shunt 150A 0 ~ 150A

Shunt 200A 0 ~ 200A

Shunt 300A 0 ~ 300A

Shunt 400A 0 ~ 400A

Voltage 2~1000V

Power 2W ~ 400kW

5.1.1 Voltage

Voltage measurement range of SPM90 is 2~1000V. Users should be noted

this to prevent saturation of internal measurement circuit, which may cause

inaccurate measurement.

Note: If “U ERR V” is displayed when voltage is over 50V, it means

that wires on port 1 and 2 are reversely connected.

10
5.1.2 Current

Shunt module is needed when SPM90 measures the current. The shunt is

actually a resistor with very small resistance. Voltage appears when there is

current running through, which can be shown on ampere meter. Shunt

specifications: 100A, 150A, 200A, 300A，400A.

Note: If “I ERR A” is displayed when the meter accessed load, then it

means that wires on the port 3 and 4 are reversely connected.

5.2 Energy Parameters

The maximum energy SPM90 can measure is 999999.999, with three

decimal places. When it reaches the maximum value, it automatically turns

over to 0.

5.3 Electric Energy Pulse

Pulse width fixes at 90ms, pulse constant is 100imp/kWh.

11
6. Communication
6.1 Overview

SPM90 get communicated with 1CH RS485. Please refer to picture shown

below for wiring diagram. In real application, to prevent signal reflection, a

resistor of about 120Ω will be connected at the end of RS485 network for signal

matching. Users should be noted this.

Pic.9 RS485 communication port wiring diagram on SPM90

12
6.2 Communication Media

30 pieces of SPM90 can work together in one network at most, which are
wired via NO. 22 shielded twisted pair. If no repeaters, then the longest
distance of wire should be 1200 meters.

6.3 Communication Protocol

SPM90 is in accordance with the MODBUS-RTU and DL/T 645-2007

protocol, which can be set via the setting interface. For detailed information of

protocol, please refer to the manual of “SPM90_MODBUS Communication

Protocol” and “SPM90_DL/T 645-2007 Communication Protocol”.

6.4 Communication Parameters

Whether the meter can communicate with the master station depends on

whether the communication parameters are correct. Communication

parameters include:

Meter address ID: This is the identification of the meter on the network. It’s

requested that the ID of every meter in the same network is the only one.

Baud rate of communication 1: 2400, 4800, 9600, 19200 are optional.

6.5 Anti Strong Electricity Function of Communication Port

Communication Port on SPM90 supports Anti Strong Electricity Function.

The meter won’t be burnt when wired into strong electricity (380VAC) for a

short time(within 5 mins). Communication function gets back to normal when

strong electricity is removed.

13
7. Technical Parameters
Parameter Range
Rated working
9-36VDC
Rated voltage
Working Rated current 100A、150A、200A、300A、400A
Parameter Rated input
1000VDC
voltage
Parameter Range Accuracy
Voltage 2-1000V 0.2%
Electrical 1% ~120% of rated
Current 0.2%
Parameter current
Accuracy Energy 0~999999.999kWh Class 0.5
Power 2W ~ 400 kW 0.5%
Parameter Performance
Consumption ≤ 1W
Pulse constant 100imp/kWh
Rated voltage of
75mV
shunt
Normal working
-20℃～+55℃
temperature
Extreme working
-25℃～+75℃
temperature
Environment Storage
-30℃～+80℃
Temperature temperature
Working humidity Under 95%
Insulation
≥ 100MΩ
resistance
Impulse voltage 6000V
IP Protection
Complete machine IP20
grade

14
 Experimen
Item Reference standard
t grade
ElectroStatic GB/T17626.2-2006
Grade 3
Discharge (IEC61000-4-2:2001)
Radiated immunity
of radiofrequency GB/T17626.3-2006
Grade 4
electromagnetic (IEC61000-4-3:2002)
fields
Electrical fast
GB/T17626.4-2008
transient burst Grade 4
(IEC61000-4-4:2004)
immunity
Surge (impact) GB/T17626.5-2008
Electromagn Grade 4
immunity (IEC61000-4-5:2005)
etic compatib
Conduction
ility
noise immunity GB/T17626.6-2008
Grade 3
of radio-frequency (IEC61000-4-6:2006)
field induction
Electromagnetic e
GB 4824-2013
mission limiting Conformed
(CISPR11：2010)
value
Voltage sag、
shot-time GB/T17626.11-2008
Conformed
interruption (IEC61000-4-11:2004)
immunity

15
8. Appendix

8.1 Terminals Definition

No. Definition Description

1 V+ Positive polarity of voltage input

2 V- Negative polarity of voltage input

3 I+ Positive polarity of voltage input

4 I- Negative polarity of current input

5 485A RS485 positive polarity

6 485B RS485 negative polarity

7 POW- Negative polarity of power input

8 POW+ Positive polarity of power input

9 NC /

10 NC /

11 Pulse- Negative polarity of energy pulse

12 Pulse+ Positive polarity of energy pulse

16
8.2 Typical Wiring Diagram

Wiring of SPM90-1-P is as follows:

PULSE+ 12 8 POW+

PULSE- 11 No Incorrect Connection ! 7 POW-

NC 10 6 485B

NC 9 1 2 4 3 5 485A

V+ input

V- input Shunt LOAD

A B
Between A and B point, do not connect any other device !

Note:

1. If -P is not included in order, then terminal 9, 10, 11, 12 are not added

on the meter.

2. When installing and wiring, meter shall work with the shunt in the

same package. Otherwise, measuring accuracy will be influenced.

3. The current sampling circuit must be connected to the SPM90 and

cannot be mixed with other device. That is, it is not allowed to connect

any other device between A and B point in the above figure to prevent

damage to the instrument due to voltage circuit.

17
Examples of errors:

Example 1

PULSE+ 12 8 POW+
PULSE- 11 7 POW-
NC 10 6 485B

NC 9 1 2 4 3 5 485A

V+ input

V- input QF Shunt LOAD

A B

A circuit breaker is connected

between A and B point, which is
wrong!
Example 2

PULSE+ 12 8 POW+
PULSE- 11 7 POW-
NC 10 6 485B

NC 9 1 2 4 3 5 485A

V+ input

V- input FU Shunt LOAD

A fuse is connected between A

and B point, which is wrong!

18
Notice:
 PILOT reserves the right to modify this manual without prior notice in

view of continued improvement.

ZHUHAI PILOT TECHNOLOGY CO., LTD

Add: No. 15, Keji 6 Road, Chuangxin Haian, Tangjia High-tech Zone, Zhuhai,

Guangdong, 519085 China

Tel: +86-0756-6931888 ext 6088

Email:marketing@pmac.com.cn

http://www.pmac.com.cn