Table of Contents
Advertisement
6
The MTL4-ADIO can be configured for input and output configuration to suit a wide
range of signal types and ranges. It is the ideal complement for universal I/O system
cards where the I/O is assigned on a channel by channel basis.
This section describes the key aspects of each possible UI configuration. The wiring
connections are identified and any specific settings or parameters are itemised. The
mode and its default configuration can be chosen manually by means of the configuration
button, as described above, but other aspects of the channel configuration require the
use of the system configuration software.
Detailed configuration is best carried out using the PC based, MTL4-PCS software
configuration tool, but basic type functionality can be accomplished manually using the
configuration button on the UI module. Once the configuration is established it can be
stored in the module base. By this method, the UI module can be removed, swapped or
substituted and the replacement UI will automatically adopt the configuration previously
stored.
For a detailed technical specification, refer to the datasheet, which can be found on our
website at http://www.mtl-inst.com
6.1
The digital input configuration will respond to a range of 'switch-type' inputs connected
as shown below. Phase reversal, when selected, inverts the phase of the system input
signal.
contact
+
V
–
Voltage
The switch circuit is powered by the isolator and the signal transferred to the system as
a change in resistance that will cause the current on the system input to vary. For switch
'open' the current will be 0mA, for switch 'closed' the current will be 10mA maximum, or
less, depending on the system input type.
When using the LFD facility with a dry contact input, resistors must be used as
shown in Figure 6.1.
Fit 500Ω to 1kΩ (preferred value 680Ω) in series with the switch and 20kΩ to 25kΩ
(preferred value 22kΩ) in parallel with the switch.
20
UI CONFIGURATIONS AND CONNECTIONS
Digital input (DI)
FIELD
Dry
Digital
Input
10V 14mA
680
+
22k
Input/Output
–
NAMUR
Common
26.5V 90/136mA
Figure 6.1 - Digital input options
MTL4-SD
Loop
Disconnect
1
A
2
V out
Input/
B
Output
3
MTL4-ADIO
C
Common
4
MTL4-BSIS
SYSTEM
Digital
Input
Dry
contact
Voltage
NAMUR
Input +
Input +
Input +
V
Input –
Input –
Input –
INM MTL SUM5 Rev 1
Advertisement
Table of Contents
