
Hardware Setup
2-4
Figure 2-2 shows the termination jumpers on the printed circuit board.
Figure 2-2. Termination Jumpers
NOTE
Pumps are shipped with the RS-485 termination jumper installed on JP2.
Please remove the jumpers if they are not needed.
When communicating with the pumps via RS-232, one pump in the chain must be
configured for RS-232 communication. This pump receives the RS-232 signal from the
PC or controller and converts it to RS-485, then passes the RS-485 signal to all other
pumps in the chain.
Refer to the cabling illustrations on the following pages. These illustrations show the
multi-pump cabling for RS-232, RS-485, and CAN connections, respectively. Also
shown is the external termination scheme for the RS-485 chain. This scheme can be used
if the terminators are installed in the system instead of on the pump.
The CAN interface is a two-wire serial system. The bus is driven differentially in a
manner similar to RS-485. The major difference is in the protocol. The CAN protocol is
designed to allow any device on the bus to send a message at any time. This is unlike
other two-wire interfaces in which the slave devices can only transmit in response to a
query. Using the CAN interface, the pump can send a message to inform the master that it
has completed its task. Anti-collision detection (which reconciles problems that occur
when two devices talk at once) is carried out by the CAN controller hardware.
NOTE
Always power off pumps before connecting to or disconnecting from the bus.
For XP 3000s with microstep-enabled firmware, please refer to “Configuration
Jumpers (JP1) for Microstep-Enabled Firmware” and “Termination Jumpers
(JP4) for Microstep-Enabled Firmware,” later in this chapter.
Содержание XP 3000
Страница 21: ...Hardware Setup 2 5 RS 232 CABLING Figure 2 3 RS 232 Multi Pump Cabling nc ...
Страница 22: ...Hardware Setup 2 6 RS 485 CABLING Figure 2 4 RS 485 Multi Pump Cabling RS 485 A RS 485 B ...
Страница 23: ...Hardware Setup 2 7 CAN CABLING Figure 2 5 CAN Multi Pump Cabling ...
Страница 36: ...Hardware Setup 2 20 Figure 2 12 XP 3000 Threaded Mount Holes ...
Страница 134: ......