TriContinent C24000, Product Manual

Page: 26 / 144

Make electrical connections
Installation instructions
26
RS232 cabling
Cabling for RS232 goes from the host controller serial port to the first
pump on the bus. There it is converted by the pump electronics to/from
RS485 for remaining pump connections.
Figure 4-5. RS232 communication and power cabling
J9
J9
RS485
Terminations
J9
RS485
Terminations
J9
J9
Location
Pump Bottom View
(2)
J3
SW1
Device 3
8
7
6
5
4
3
2
1 0
F
E
D
C
B
A
9
(0)
J3
SW1
Device 1
8
7
6
5
4
3
2
1 0
F
E
D
C
B
A
9
Device 15
(E)
J3
SW1
8
7
6
5
4
3
2
1 0
F
E
D
C
B
A
9
(1)
J3
SW1
Device 2
8
7
6
5
4
3
2
1 0
F
E
D
C
B
A
9
+ -
Power Supply 24VDC
RXD
TXD
GND
Host Serial Port Pump Port (J3)
Function DB9 Pin Function J3 Pin
TXD 2 RXD 2
RXD 3 TXD 3
GND 5 GND 10
+24V
Ground
+24V
+24V Ground
Ground
RS 485A
RS 485B
Single-pump Installations:
Make input and power connections as shown
for Device 1.
Leave RS485 termination jumpers installed.
Power
to next
device
Power
from
previous
device
+24V
Gnd
+24V
Gnd
Power Cabling Recommendations
• Cables 24 AWG or heavier, as short as practical.
• Use one power cable for every two pumps as shown.
However, a single power bus may be used if wire is
sized for total current requirements and voltage
drops.
• Twist wires together on cable pairs leading from
power supply directly to pump.
RS232
Host Controller
CAUTION: Do not place switches in line with the DC
input of the pumps to apply and remove power.