Status Display; I/O Wiring Connector; Asynchronous Operation; Modes Of Operation - Control Technology 2500 Series Installation And Operation Manual

1.2.1 Status Display

The Status Display will be illuminated with a "0" when the module is functioning normally. If
the Status Display is not lit or if it displaying something other than "0", refer to Chapter 3 for
troubleshooting.

1.2.2 I/O Wiring Connector

The 2500C-8-TC utilizes a modified 32 pin connector, part number 2500C-32F-CJC (a
standard connector is NOT interchangeable) to provide wiring terminals for Channels 1-8
thermocouple inputs and two temperature (cold junction compensation) sensors. The wiring
connector accepts 14-22 AWG wire.

1.3 Asynchronous Operation

The module operates asynchronously with respect to the PLC (a scan of the PLC and input
sampling of the module do not occur at the same time). Instead, the module will translate all
analog inputs in one module update (3.5 milliseconds maximum) and store the translated
words in buffer memory. The PLC retrieves the stored words from the module buffer
memory at the start of the I/O scan.

Figure 2 Asynchronous Operation Diagram

1.4 Modes of Operation

The 2500C-8-TC supports two modes of operation: Classic mode and Classic Plus mode.
These two modes are selected by jumper JP11 located at the top of the card. Refer to
Figure 22 2500C-8-TC Board Layout Picture for the location of this jumper. Classic Mode is
the default shipping selection.
2500C-8-TC Installation and Operation Guide
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