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and the slot on motherboard to remove the old module, and then install a new module. Changing module type needs
to modify the corresponding parameters.
1.3.4 Electric isolation of the modules
There are a group of 24V and a group 12V power supply built in the instrument and isolated to the main circuit. The
24V power commonly supplies voltage output module, such as V24/V12/V10/V5, I2 and I4. The 12V power is
commonly supplies output or communication module. Generally, the relay contact output and TRIAC no contact
discrete output are self insulated from the other circuit, no matter whether other modules are installed or not. SSR
output voltage does not need to be insulated from input circuit, because SSR itself has isolation function. Therefore,
only the electric isolation between the communication interface and the current output should be considered. Those
modules, for example, S (RS485 communication interface), R (RS232 communication interface) and X3 (linear current
output), all need the 12V power supply. If more than one of the above modules are installed, in order to be electric
isolated, only one of them can be module without electric isolation, the other modules should be S4 or X5, which has
its own isolated power supply. For example, if an X3 module is installed in OUTP (main output) slot, for isolate
purpose, COMM slot should be install S4 or X5.
1.3.5 Further descriptions about module applications
Voltage output module:
The voltage output modules like V24, V12, \/10 or V5 are often used for supplying
power for external transducer or feedback resistance of transmitter. These modules can be installed in any slot.
To standardize the wiring, it is recommended to be installed in the first idle slot in the order of MIO, AUX, and
