Termination Resistors; Leds; Applications; Aplicaciones - Grundfos CIM 1XX Montage- Und Betriebsanleitung

3.3 Termination resistors

The termination resistors are fitted on the CIM 1XX
Profibus module. See fig. 4.
+5V
390
220
390
Fig. 4 Internal termination resistors
The CIM 1XX has a DIP switch with two switches
(SW1 and SW2) for cutting the termination resistors
in and out. Figure 5 shows the DIP switches in cut-
out state.
SW1 SW2
Fig. 5 Cutting termination resistors in and out
DIP switch settings
Status
Cut-in
Cut-out
Undefined state
To ensure a stable and reliable
communication, it is important that only the
Note
termination resistors of the first and last
units in the Profibus network are cut in.
6
SW1 SW2
ON ON
OFF OFF
ON OFF
OFF ON

4. LEDs

The CIM 1XX Profibus module has two LEDs.
See fig. 1.
• Red/green status LED (LED1) for Profibus
communication
• Red/green status LED (LED2) for internal
communication between the CIM 1XX and the
Grundfos product.
LED1
Status Description
The CIM 1XX has been switched
Off
off.
The CIM 1XX is ready for data
Permanently
transmission (Data Exchange
green
State).
• CIM 1XX module fault.
Permanently
• The CIM 1XX does not
red
support the Grundfos product
connected.
Wrong or missing Profibus
Flashing red
configuration.
LED2
Status Description
Off The CIM 1XX is switched off.
Internal communication between
Permanently
the CIM 1XX and the Grundfos
green
product is OK.
Permanently The CIM 1XX does not support
red the Grundfos product connected.
No internal communication
Flashing red between the CIM 1XX and the
Grundfos product.
During start-up, there may be a delay of up
Note
to 5 seconds before the LED2 status is
updated.