Technical specifications of the Volt AIO: the analog and digital inputs and outputs, the network, the failsafe behaviour, the power supply and the environmental limits.
The data of the Volt AIO that you need to design and wire the cabinet.
At a glance
Item
Specification
Channels
6 analog inputs, 2 analog outputs, 2 digital inputs and 2 digital outputs
Communication
Modbus TCP over Ethernet
Power supply
10 to 30 VDC, 3.6 W maximum
Isolation
2500 VDC between the IO and the rest of the module, 1500 VDC on Ethernet
Ambient temperature
-25 to +75 °C
Mounting
DIN rail, 72 × 123 × 35 mm
Analog inputs
Parameter
Value
Channels
6, differential
Current range
0-20 mA, ±20 mA or 4-20 mA, selected per channel with a jumper
Resolution
16 bit
Accuracy
±0.1 % in the normal measuring mode (±0.02 mA), ±0.5 % in the fast measuring mode
Sampling
10 measurements per second, across all channels together
Input resistance
125 Ω
Open-wire detection
In the 4-20 mA range
Overvoltage protection
240 Vrms
Common-mode voltage
±200 VDC
Analog outputs
Parameter
Value
Channels
2
Current range
0-20 mA or 4-20 mA, selected per channel with a jumper
Resolution
12 bit
Accuracy
±0.1 % of the range (±0.02 mA)
Maximum load
500 Ω, the module sources the current itself
Open-wire detection
In the 4-20 mA range
Common return
AO0 and AO1 share AGND
Power-on value and safe value
Configurable per output
Digital inputs
Parameter
Value
Channels
2
Dry contact
On = closed to GND, off = open
Wet contact
On = at most 1 VDC, off = 3.5 to 30 VDC
Maximum cable length
500 m
Overvoltage protection
30 VDC
Digital outputs
Parameter
Value
Channels
2
Type
Isolated open collector that switches to the minus (sink)
Load voltage
5 to 50 VDC
Load current
At most 700 mA per channel
Protection
Overvoltage up to 60 VDC, overload from 1.4 A, short circuit
Power-on value and safe value
Configurable per output
Network and protocol
Parameter
Value
Ethernet port
1 × RJ45, 10/100 Mbps
Protocol used by the EMS
Modbus TCP
Addressing
A fixed IP address is required
Configuration
Web interface in the browser, on the module’s IP address
Access
Protected with an ID, a password and an IP filter
Failsafe behaviour and watchdog
Parameter
Value
Communication watchdog
Configurable, off from the factory. If Modbus TCP communication is lost for longer than the set time, the analog and digital outputs go to their safe value.
Start-up
At start-up every output gets its configured power-on value.
Power loss
Without power the module sources no current: the analog outputs drop to 0 mA and the digital outputs no longer switch.