Despatch P1400+ Temperature Controller Manual do Utilizador descarregar pdf (Página 28)

4.17 Option Slot A

Option Slot A Connections - RS485 Serial Communications Module

If option slot A is fitted with the RS485 serial communication module, connections are as illustrated.

Carefully observe the polarity of the A (Rx/Tx +ve) and B (Rx/Tx -ve) connections.

Figure 27. Option Slot A – RS485 Serial Communications Module Connections

Option Slot A Connections - Digital Input Module

If a digital input module is fitted in option slot A, this may be connected to either voltage free

contacts (e.g. switch or relay), or a TTL compatible voltage. Connections are shown below.

Figure 28. Option Slot A – Digital Input Module Connections

Option Slot A Connections – Basic Auxiliary Input Module

If option slot A is fitted with a basic auxiliary input module, connect as shown. For

-DIN &

-DIN

models it is recommend that the full auxiliary input (Option Slot B) is used instead, as this has

additional features and leaves option slot A free for other modules.

Figure 29. Option Slot A – Basic Auxiliary Input Module Connections

WARNING:

THIS MODULE MUST NOT BE FITTED IF FULL AUXILIARY INPUT IS FITTED IN OPTION SLOT B.

RS485

COM

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Despatch P1400+ Temperature Controller Manual do Utilizador Página 28