Scope Of Delivery; Electrical Connections; Environmental Conditions - Mettler Toledo WKC Manual De Usuario

3 WKC Weigh Modules

3.1 Scope of Delivery

All models are supplied by default with the following items:
WKC weigh module with weighing pan
•
Wind ring (WKC205 only)
•
Production test certificate
•
Declaration of Conformity
•
User manual
•

3.2 Electrical Connections

WKC weigh modules have an RS422 interface for the communication with the control systems.
Interface specifications
Interface type
Weight update rate (max.)
Power supply for the weigh module
Input voltage
Input current
Use a stable power supply with no voltage fluctuations.
•
If voltage fluctuations cannot be prevented, use a voltage regulator to deliver a constant voltage value to the
•
load cell.
The power supply must be approved by the respective national test center of the country in which the weigh
•
module will be used.

3.3 Environmental Conditions

WKC weigh modules can be operated within the following environmental conditions:
Temperature Range
Relative air humidity
Height above mean sea level
Warm-up time
Overvoltage category
Pollution degree
Means of protection
IP protection
Further technical data
For further technical data and accessories refer to the WKC Data Sheet, see [Further Documents } Page 3].
WKC
RS422, bidirectional, full duplex, 2'400 to 38'400 bps
RS485, unidirectional, half duplex, 2'400 to 38'400 bps
RS232C, bidirectional, full duplex, 2'400 to 38'400 bps
92 Hz
12 to 24 V DC nominal (10 to 29 V DC)
max. 0.2 A
Operating / Compensated +10 ... +30 °C
Allowable ambient +5 ... +40 °C
Storage temperature –25 °C ... +70 °C
Max. 80 % at 31 °C, decreasing linearly to 50 % at
40 °C, non-condensing
Max. 4'000 m (13'330 ft)
At least 30 minutes after power up
II
2
III
IP42
WKC Weigh Modules​ ​ 5