West Control Solutions Pro-EC44 - Manual (Page 32)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 25
Plug-in Module Slot 3 - Triac Output Module
If fitted with a Triac output module, connect as shown. This output is rated at 0.01 to 1 amp
@ 280V AC 50/60Hz. Isolated from all other inputs and outputs. A snubber should be fitted
across inductive loads to ensure reliable switch off of the Triac.
Figure 36. Plug-in Module Slot 3 - Triac Module
Plug-in Module Slot 3 - Transmitter Power Supply Module
If fitted with a transmitter power supply module (TxPSU), connect as shown. The output is a
24V nominal (unregulated, 19 to 28V DC), supply at 22mA max. Only one TxPSU is
supported, do not fit in slot 3 if one is already fitted in slot 2.
.
Figure 37. Plug-in Module Slot 3 - Transmitter Power Supply Module
Plug-in Slot A Connections
A selection of plug-in modules are available for Module Slot A. They can be fitted during
manufacture, or purchased and fitted later by the user. Depending on their functions, they
are setup Input or Communications configuration sub-menus. Connect as illustrated below.
Plug-in Module Slot A
– Basic Auxiliary Input Module
If fitted with a basic auxiliary mA/V DC analogue input module, connect as shown. Isolated
from all inputs/outputs. Consider using the 2
nd
auxiliary input (if available) instead, as this has
additional features and leaves plug-in module slot A free for other modules.
Figure 38. Plug-in Module Slot A – Basic Auxiliary Input Module