Type Item Specification
Type Normally open, unprotected
Output 100 mA, 250V AC/DC
Leakage current max 0.01 mA
Analog inputs
This table shows the electrical data of the analog inputs.
Table 23
Item Specification
Isolation Individually optoisolated
Resolution 12 bits
Signal range 4-20 mA
Internal dynamic resistance, full scale 50 Ohm
Inaccuracy, full scale, typical 0.1%
Voltage drop 8V
Number 4
Communication
This table shows the electrical data of the communication
Table 24
Item
Specification
Communication port RS232
Number of ports 4
Bus communication 4-20 mA
Max number of I/O 600
Active sensor
An active sensor should deliver a voltage of at least 8 V DC and a 4-20 mA current.
User interface
The user interface uses a 2x20 character LCD display with led backlight.
Table 25: This table shows the number of push buttons and indications of the interface for the
different versions.
Version
Push buttons Alarm indications Pump well
indications
RTU status
indications
APP 721
Pump controller
8 16 7 4
APP 731
Pump controller
8 16 10 4
APP 741
Pump controller
8 16 13 4
Technical Data
22 Hardware for APP700 and APX700 Installation
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