Connection And Operation Via The Rs-422 Port; Figure 44: Rs-422 Connectors - MSA FieldServer QuickServer FS-QS-1011 Startup Manual

8.1.1

Connection and Operation via the RS-422 Port

RS-422 Connector
Pin 1-2: TX +/- (Differential TX outputs: All + signals must be connected to each other, and same applies
to - signals; no +/- signals may be crossed)
Pin 3-4: RX +/- (Differential RX inputs: All + signals must be connected to each other, and same applies
to - signals, no +/- signals may be crossed)
Pin 5: SHD (Shield connection, must be connected on at least one side of the bus, but not necessarily
on both sides)
POWER Connector
Please note that AC voltage is not supported on the RS-422 carrier, and that DC voltage range is ~20VDC
to ~28VDC.
Pin 1: +24V (DC power requires this pin be used for the positive voltage)
Pin 2: 0V (DC power requires this pin is used for ground / return voltage)
Pin 3: FG (this pin needs to be connected to EARTH or noise free reference point - CHASSIS)
Additional Model Connection Ports
5-pin RS-422 3-pin Power
Connector
Connector

Figure 44: RS-422 Connectors

QuickServer Start-up Guide 45