Pulsafeeder Pulsar DLCM - Manual (Page 26)

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Important Wiring Detail
Slave to Slave
When connecting two Slaves, the wiring is straight through. For example: Connect the transmit lines
to the transmit lines and the receive lines to the receive lines (refer to the drawing below).
Master to Slave
When wiring between a Master and a Slave, the Transmit and Receive lines must be crossed. For
example: Connect the transmit lines to the receive lines (refer to the drawing below).
Figure 10 – Wiring Detail