English (GB)
6
4. Specifications
4.1 CIM module
4.2 CIU 202 Modbus RTU
The table below provides an overview of the specifications for
Grundfos CIU 202. For further details, refer to the specific
sections of this functional profile.
* Can only be set via software.
General data
Description
Comments
Ambient humidity
30 % to 95 %
Relative, non-condensing.
Operating temperature
-20 °C to +45 °C
Battery, lithium-ion
You can only charge the battery if the
battery temperature is within 0 °C to +45 °C.
CIU 262 only.
GENIbus visual diagnostics
LED2
Will be in one of these states:
Off, permanently green, flashing red, permanently
red.
See section
.
Power supply (CIU)
24-240 V
Located in the CIU.
CIU box enclosure class
IP54
CIU box dimensions (H x W x D)
182 x 108 x 82 mm
Storage temperature
-25 °C to +70 °C
-13 °F to +158 °F
Modbus RTU specifications
Description
Comments
Modbus connector
Screw-type terminal
3 pins.
See section
Modbus connection type
RS-485, 2-wire + common
Conductors: D0, D1 and Common.
See section
Maximum cable length
1200 m
Equals 4000 ft.
Slave address
1-247
Set via rotary switches SW6 and SW7.
See section
.
Line termination
On or Off
Set via DIP switches SW1 and SW2.
See section
Recommended cable cross-section
0.20 - 0.25 mm
2
AWG24 or AWG23
Supported transmission speeds
1200*, 2400*, 4800*, 9600, 19200, 38400
bits/s
Set via DIP switches SW4 and SW5.
See section
5.1 Setting the Modbus transmission
.
Start bit
1
Fixed value.
Data bits
8
Fixed value.
Stop bits
1 or 2
Set via DIP switch SW3.
See section
.
Parity bit
Even parity, odd parity* or no parity
Set via DIP switch SW3.
See section
.
Modbus visual diagnostics
LED1
Off, flashing green, flashing red, permanently red.
See section
.
Maximum number of Modbus devices 32
Using repeaters, this number can be increased.
Legal address range is 1-247.
Maximum Modbus telegram size
256 bytes
Total length. Node address and CRC included.
See section
