Description
Set Point
Stop bit
1
Echo
no
Tbl. 3:
Default serial link configuration
1
5
6
7
2
3
4
9
10
15
14
13
12
11
8
V+(A)
V-(B)
+5 V-10 mA max.
(RS-485)
(RS-485)
GND
Fig. 5:
Male 15-pin RS-485 connector
Pin
Assignment
8
GND
3
RS-485: V-
2
RS-485: V+
1
+5 VDC -10 mA max (only for RS-485)
It is the user’s responsibility to use shielded links and connections in compliance with EMC and electri-
cal safety standards.
RS-485 connection
A computer manages several pumps (P1, P2, Pn, etc.) using the RS-485 serial link via the
RS-485
con-
nector. This parallel wiring allows communication between the pumps even if a pump is disconnected.
The wiring of the product at the end of line Pn* and the wiring of a single product on the network is spe-
cific (see figure below).
1
2
3
4
8
9
15
1
2
3
4
8
9
15
1
2
3
4
8
9
15
RS-485
communication
box
P1
P2
Pn*
1
,5
k
Ω
/
1
/4
W
1
,5
k
Ω
/
1
/4
W
5.6.2 Setting
When the wiring is done, to allow pump control via serial link, proceed as follows:
1. Set the main switch to
I
.
2. Send an order via the serial link: this order has no priority on remote control mode via dry contacts
The commands
Header character
The default setting is the decimal code 035 of the character #
Address
Number given to the pump, 3 characters
Order
Command sent on serial link, 3 characters
Parameter
The number of characters depends on the command
End character
This is the message end character. Default setting: ASCII code 13
<CR>
Installation
26/56
Summary of Contents for ACP 28 CP
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