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PT81| B&R PT81 A/C Auto Temperature Control Relay Connector PT81
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Product Description
PT81| B&R PT81 A/C Auto Temperature Control Relay Connector PT81
The general PLC can directly send the command to the control loop, but it may also be relayed by
the relay first. If the output of your PLC is 24VDC, but the picture drawn in your control loop needs
220VAC for the node, then you must add a relay to the PLC output, that is, the relay will act when the
command is issued. Let the node of the control loop be connected to the normally open or normally
closed point of the relay. This is also the choice of whether to use the relay depending on the situation.
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Most modern fault-tolerant controller based on Triple Modular Redundancy (TMR) architecture.
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