CALEFFI CONTECA EASY ULTRA - Page 5

CONTECA
®
EASY ULTRA meter electrical connections
ELECTRONICS BOX REAR PART
CABLE ROUTE
TEAR-PROOF CABLE CLIP
AA
AA
1234 56789101112131415161718
1234 56789101112131415161718
24 V (ac)
1234 56789101112131415161718
1234 5 6 7 8 910 11 12 13 14 15 16 17 18
RS485
1234 56789101112131415161718
Cooling units
1234 56789101112131415161718
1234 56789101112131415161718
digital input
A B
Heating units
4
th
pulse input
3
rd
pulse input
pulse input
blue wire
white wire
For box or direct wall mounting, use the screws provided and insert them into the corresponding holes A
Pins Description
Accessory
1 – 2 OUT 2 - Open collector pulse output for COOLING UNITS. GND=2 / duration 120 ms / Vmax 24 V (dc) - 50 mA
755882
2 – 3 OUT 1 - Open collector pulse output for HEATING units. GND=2 / duration 120 ms / Vmax 24 V (dc) - 50 mA
755881 –
755882
4 NOT used
5 – 6 IN 4 - fourth pulse input (generic). GND=6
2 x 755825
6 – 7 IN 3 - third pulse input (generic). GND=6
755825
8 – 9 IN 2 - Pulse input for DCW. GND=9
9 – 10 IN 1 - Pulse input for DHW. GND=9
11 – 12 Heating/cooling ow meter pulse input (polarised, see page 6)
13 – 14 Digital input (MUST be with voltage-free contact)
15 – 16 Electric supply 24 V (ac) 50 Hz - 1W
17 – 18 Transmission BUS RS-485 / RS-485 A=18 / RS-485 B=17
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