Hach-Lange WTOS P-RTC - Manual (Page 13)

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Section 3 Installation
3.1 RTC101 P-Module connection
The RTC module must be installed on a DIN rail/standard rail.
Install the module horizontally, with at least 30 mm clearance at the top and bottom, in
order to guarantee the functionality of the passive ventilation element. The RTC module is
operated solely via the sc1000 controller (see sc1000 controller operating instructions).
When used indoors, the RTC module can be installed in a control cabinet.
When used outdoors, the RTC module requires its own housing that follows the technical
specifications.
3.1.1 Power supply to the RTC module
Note: An external deactivation switch is recommended for all installations.
3.2 Dosing pump connection
There are two connections for the dosing pump:
• Current loop signal 0/4 to 20 mA for analog actuation of pumps with frequency
converters.
• 24 V output for the actuation of pumps without frequency converters or below the
analog adjustment range in pulse/pause mode.
Note: It must also be possible to switch the pump off via the digital output in the case of analog
actuation!
3.3 PHOSPHAX sc analyzer connection
The measuring signal of the PHOSPHAX sc analyzer is transmitted to the RTC101
P-Module from the sc-system via the RTC communication card.
Previous designs of the analyzer (e.g. PHOSPHAX inter) can be connected to an analog
input card (YAB018).
D A N G E R
Only qualified experts may perform the tasks described in this section of the manual, while
adhering to all locally valid safety regulations.
C A U T I O N
Always lay cables and hoses so that they are straight and do not pose a tripping hazard.
C A U T I O N
Before the power supply is switched on, refer to the instructions in the relevant manuals!
WA R N I N G
Alternating current may destroy the direct current system and therefore jeopardize user safety.
Never connect an alternating current voltage to the 24 V direct current model.
Table 1 Supply voltage of the RTC Module
Voltage 24 V DC (–15 % / +20 %), max. 25 W
Recommended fuse C2
With 110–230 V option 110–230 VAC, 50-60 Hz, approximately 25 VA