The MMTCP8AI/I ISO module is a 8 channel isolated current input module.
The module uses differential inputs to reduce effects of electrical noise and
mains pickup. The current inputs are isolated from the logic and from each
other.
The current input can be
represented in a number of formats according to the type which is setup by
writing a value to the Type register. The value is obtained from the table
below.
The standard setting for
the MMTCP8AI/I ISO module is 0 - 20mA input current which represents an output
value of 0 - 4095 (12 bits) in the corresponding Modbus register.
4 mA would give a reading of 819 ± 1LSB.
The module can also be
configured for a 0 – 20.000mA input range or +/- 20.000mA input.
Each MMTCP8AI/I ISO Module
has a unique Ethernet IP address which must be programmed into the PC or PLC.
The IP address in the MMTCP8AI/I ISO Module is configured via the Web Server.
Any standard Web browser such as Internet Explorer can be used to access the web
pages were configuration is carried out. The converters are factory programmed
with a default IP address of 169.254.111.111. This address must be changed
before the converter is added to an existing network.
The web page address for
viewing the input parameters is http://169.254.111.111/index.htm
and the address for viewing the configuration data is http://169.254.111.111/tconfig.htm.
The web page address for
configuring the module is http://169.254.111.111/ip.htm
.
 | SPECIFICATIONS |
Power Supply: 10
- 26Vdc
90 mA @ 24VDC / 160mA @ 12VDC
Inputs:
Current
Input Type
Range
Resolution
1
0
– 4095
(12 bits)
2 0
– 20.000 mA
1uA
3 +/-
20.000 mA 1uA
Isolation
1000Vrms between field and logic
350Vpeak between each current input
Drift
100ppm/°C
Ethernet:
10BaseT - 10Mbits/s twisted pair
Connector:
11 Pin Connector on rear of unit
RJ45 on front of module for 10Base-T Ethernet
18 Way screw connector on front
The Web page address "169.254.111.111/ip.htm"
is entered into the address line of the browser window to access the
configuration page. This page allows you to change the IP address, default
gateway and subnet mask of the MOD-MUX TCP Module, select the Input type, and to enter a Module Description Name
and Input Names for identification/maintenance purposes.
| IP
Address: The new IP address can be entered into the web page as shown above.
After this has been done, you must click the Submit button to send the
values to the MOD-MUX TCP Module. The screen will now be updated and if
successful will continue to display the new IP address. The new IP address
will only be effective after the MOD-MUX TCP Module power has been switched
off and on again. This feature allows you to check that the correct IP
address has been entered before being activated. If the IP address has been
entered incorrectly and the power has not been switched off, it is possible
to re-enter the correct IP address. If the power has been switched off and
back on again, the MOD-MUX TCP Module will not communicate until you enter
the new IP address into the address line of the browser window.
|
| Default
Gateway IP Address: If the MOD-MUX
TCP Module is on a different network to your PC you may need to setup the IP
address of the gateway.
|
| Subnet
Mask: The subnet mask must also be entered if the default gateway setting
is used. A subnet mask of 000.000.000.000 will disable the default gateway
setting.
|
| Socket
Timeout: The MOD-MUX TCP Module
communicates using sockets which are part of the TCP/IP protocol. The module
has 5 sockets. If a communication link is lost with the Modbus master, then
there exists the possibility that the socket stays open and is no longer
accessible. The timeout facility is reset each time a valid Modbus message
is received and the socket stays open. If there is no activity then the
socket will timeout and send a message to the Modbus master indicating that
the socket is closing.
|
| Input
Type: The type for the module can be configured by entering the
corresponding number from the list in the specifications. |
| Module
Name: This field allows you to enter a module description name into the
MOD-MUX TCP Module. This is an identifier for diagnostic/maintenance
purposes and is chosen to best describe the MOD-MUX TCP Module in the system
by name or number.
|
| Input
Names: These fields allow you to enter an input description name into the
MOD-MUX TCP Module. This is an identifier for diagnostic/maintenance
purposes and is chosen to best describe the particular input by name or
number.
|
To view the default
Web page in the MOD-MUX TCP Module, start the Web browser and type
"169.254.111.111" into the address line of the browser window. The
main page will now be displayed in the browser window.
| Channel
Number: This refers to the actual
input number on the terminals of the module.
|
| Channel
Name: This is the name that was entered in the configuration page to best
describe the inputs.
|
| Value:
This is the current value of the
inputs. To get an updated reading it is necessary to refresh the browser
window to upload the web page again. |
To view the Configuration
Web page in the MOD-MUX TCP Module, start the Web browser and type "169.254.111.111/tconfig.htm"
into the address line of the browser window.
| Input
Type: This is the format that the module has been configured to operate
with.
|
| Line
Frequency: Depending on the mains
frequency this can be either 50 or 60 Hz
|
| 
