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2.1
The universal isolator (UI) module is the heart of the interface. It plugs into the terminal
base to provide the required isolation functionality. It can be configured for input or output
operation as well as for digital or analogue applications.
On its top edge are two LED indicators that provide module status and signal status.
A Bypass module is also available which provides a direct connection through the module
from control wiring to field wiring. This is for use only with the General Purpose module
base.
Model No.
MTL4-ADIO
MTL4-BYP
2.2
The base is the body of the channel interface. It accepts the field wiring on its rear edge,
via screw terminals, and the universal I/O (UIO) module on its front edge. It has a loop
disconnect facility built-in which may be levered outwards to isolate the field wiring from
the UIO module.
On the top it has a hinged tag-strip holder with cover and a connector to accept a surge
module (see below).
The base type is indicated by its colour:
Blue – IS module base
Grey – general purpose module base
A further option for both types is to have a relay included in the base to provide a
switched output.
Model No.
MTL4-BSIS
MTL4-BSISR
MTL4-BSGP
MTL4-BSGPR
INM MTL SUM5 Rev 1
UI Module
Once an isolator module has been used in a general-purpose installation, it
cannot subsequently be used as part of an IS installation
Module Base
WARNING!
Description
Universal analogue/digital I/F module
Bypass module
Description
IS screw terminal module base
IS relay screw terminal module base
GP screw terminal module base
GP relay screw terminal module base
3
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