CLIVET WSAT-2 - Setting Set Points; Setting the Working Set Point; Setting the Antifreeze Set Point

44
®
Control
SERIAL CONNECTION DIAGRAM TO THE SUPERVISORY SYSTEM
GND
24V
TTL
RS485
24V
GND
TTL
RS485
24V
GND
RS485
TTL
24V
GND
RS485
TTL
(2)
(3)
(3)
(3)
(3)
GND GND GND GND
GND
Address # 1 Address # 2
Address # n Address # 127
(4)
(6) (6) (6)
(5)
(5)
(1)
(6)
1. System supervisor. Software to be provided by customer
2. RS485/RS232 converter
3. Shield
4. RS485 serial line. ModBus protocol. Twisted pair + shield
5. Insert Jumper JP1 as the line termination at both ends of the serial line.
6. Jumper JP3 must be inserted
ATTENTION:
- Do not earth the shield.
- When laying the serial cable, make sure it is as far apart as possible from other cables.
- Avoid laying the serial cable near appliances that may give rise to electromagnetic disturbance.
- Avoid laying the serial cable parallel to other cables; any intersections should be at right angles.
Maximum length of the serial line 1000m