Autometers Systems A-400 Series, Programming And Installation Brochure

www.autometers.co.uk

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1. Unit Characteristics

1.1 Unit Characteristics:

The A-400 series meters have four models: A-400M, A-400MT, A-400MB, A-400P

Two pulse output indicate real-time energy measurement. An RS485/Mbus output allows remote 

monitoring from another display or a computer. 

1.2 RS485 Serial-Modbus RTU 

For A-400M and A-400MT only  

RS485 serial port with Mod bus RTU protocol to provide a means of remotely monitoring and 

controlling the Unit. Set-up screens are provided for setting up the RS485 port. 

1.3 Mbus

For A-400MB only 

This uses an MBus port with EN13757-3 protocol to provide a means of remotely monitoring and 

controlling the Unit. screens are provided for setting up the RS485 port. 

Set-up screens are provided for setting up the M Bus port. 

1.4 Pulse output 

Two pulse outputs that pulse measured active and reactive energy.The constant of pulse output 

2 for active energy is 400imp/kWh (unconfigurable),its width is fixed at 100ms. The default 

constant of configurable pulse output 1 is 400imp/kWh,default pulse width is 100ms.The 

configurable pulse output 1 can be set from the set-up menu. 

Model

A-400P
A-400M
A-400MB
A-400MT

Measurement

kWh/kVarh,kW/kVar,kVA, P,F,PF,dmd, V,A, TH D,etc. 
kWh/kVarh,kW/k.Var,kVA, P,F,PF,dmd, V,A, TH D,etc. 
kWh/kVarh,kW/kVaAr,kVA, P,F,PF,dmd, V,A, TH D,etc. 
kWh/kVarh,kW/kVar,kVA, P,F,PF,dmd,V,A,THD,etc. 

Output

pulse 
pulse/Modbus 
pulse/Mbus 
pulse/Modbus 

Tariff

No
No
No

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