Relay Output; Inputs Ai1/Di1 And Ai2/Di2 - Grundfos CIU 27 Series Installation And Operating Instructions Manual

5.1 Relay output

The relay of the IO module has two functions. It can
be used either as a normally open (NO) relay or as a
normally closed (NC) relay.
For connections, see fig. 2 and section 6. Overview
of inputs and outputs.
NO C NC
Fig. 2 Relay output
Pos. Description
Use this terminal when the relay is to be
NO
used as a normally open relay.
C Common terminal.
Use this terminal when the relay is to be
NC
used as a normally closed relay.

5.2 Inputs AI1/DI1 and AI2/DI2

The IO module has two configurable inputs. Each of
the inputs can be used either as an analog input or
as a digital input. See fig. 1, pos. 2 and 4. The
configuration is done by setting two jumpers for each
input.
The user has to select which type of control signal to
be used.
The control signal can be set to
• analog control signal 0-10 V
• analog control signal 0-20 mA
• analog control signal 4-20 mA
• digital control signal (factory setting).
Fig. 3 AI1/AI2 and DI1/DI2
For further information, see section 6. Overview of
inputs and outputs.
6
5.2.1 Jumper settings
Configuration, AI1/DI1
Configuration, AI2/DI2
AI1/AI2
or
DI1/DI2
GND
Fig. 4 Jumpers
Symbol Status Jumpers
Open
Closed
J1 J2
Open Open
Open Closed
Closed Open
Closed Closed
J3 J4
Open Open
Open Closed
Closed Open
Closed Closed
J1
J2
J3
J4
Control signal
Analog 0-10 V
Analog 0-20 mA
Analog 4-20 mA
Digital
Control signal
Analog 0-10 V
Analog 0-20 mA
Analog 4-20 mA
Digital