8.3 Control via the REMOTE connector
NOTICE
Safety of Extra-Low Voltage circuits
Remote control circuits are equipped with dry contact outputs (24 V - 1 A max). Overvoltages and
overcurrents can result in internal electrical damage. Users must observe the following wiring condi-
tions:
► Connect these outputs in accordance with the rules and protection of Safety Extra-Low Voltage
(SELV) circuits.
► The voltage applied to these contacts should be less than 24 VDC and the current less than 1 A.
Description
Connection via the
REMOTE
connector (HD, 15-pin D-Sub female) can be used for:
● remote control of following functions: start, stop
● remote pump status through auxiliary dry contacts
The remote control mode is active when the ‘Remote hardware’ control mode is set on the RS-232/
RS-485 serial link or via the HHR unit.
When the ‘Remote hardware’ control mode is set, the Stand-by speed and temperature setpoint can be
set via the RS-232/RS-485 serial link or the HHR unit.
► Use shielded cable and connect both sides to the ground.
8.3.1 Logic input wiring
Control by direct voltage
The inputs are active when a DC voltage between 10 and 24 VDC is applied between their pins (wiring
customer supplied).
5
4
3
2
1
6
11
15
10
9
8
7
+
-
+
10-24 VDC
S
5
(+)
(-)
15
10
5
(+)
(-)
GND
15
10
13, 14
A B
+15 V
Fig. 16:
Remote connector: control by direct voltage
A Internal wiring
B
Wiring from customer's side
Voltage
10-24 VDC
Function
S3 (13-15)
Stand-by
1)
Contact closed: Stand-by speed is selected.
Contact open: pump rotation speed is the nominal speed.
S4 (14-15)
Start/Stop pump
1)
Contact closed: the pump starts.
Contact open: the pump stops.
1) This function runs when the control mode is set to ‘Remote hard’ via the RS-232/RS-485 serial link
(see chapter “List of commands”) or via HHR (see chapter “SETUP menu”).
Control by dry contacts
To control these inputs by external contacts of the host equipment, connect pins 10 with 15 and wire the
used contacts (wiring customer supplied). Pins 13, 14 are connected to + 15 V (pin 5) to be active.
Interfaces for control
48/78
