Danfoss 140F1089, Installation Instructions Manual, Page: 35 / 40

DEVIreg™ 850 IV
35 Installation instruction
C: PSU and feeder cable
Note:
max. 3 m length of the cable between the PSU and the 850 controller.
PSU. If power supply unit (PSU) is 24W/1A follow the rules below (PSU should be ap-
proved to connect in parallel).
Ground system
1 pcs. PSU 24 VDC
24 W
2 pcs. PSU 24 VDC,
24 + 24 W in parallel**
Number
of sensors:
1 or 2 * 3 4
Cable type Max. length (m) Max. length (m) Max length (m)
1 mm² 300 150 80
1.5 mm² 450 225 120
2.5 mm² 750 360 200
4 mm² 1200 600 310
*if 2 sensors are used in a dual zone system (ie. 1 sensor in each zone) — 2 PSUs are required
Roof System
1 pcs. PSU 24 VDC
24 W
2 pcs. PSU 24 VDC,
24 + 24 W in parallel**
Number
of sensors:
1 2 3 4
Cable type Max length (m) Max length (m) Max length (m) Max length (m)
1 mm² 400 100 130 75
1.5 mm² 600 150 200 110
2.5 mm² 1000 250 330 190
4 mm² 1600 400 525 300
DEVIreg 850 IV
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
+ – + – – + - +
PSU
24 V DC
PSU
24 V DC
220–240 VAC
50–60 Hz
220–240 VAC
50–60 Hz
**Fig� H —
connection of 2 pcs. PSU in parallel