Nor-Cal CDG 025 OP Lit - Manual (Page 10)

10 CDG025-OP-LIT (2010-1)
Supply
DANGER
The gauge may only be connected to power sup-
plies, instruments or control devices that conform
to the requirements of a grounded protective extra-
low voltage (SELV) and limited power source
(LPS), Class 2. The connection to the gauge has to
be fused.
Supply voltage
at the gauge
ripple
+14 … +30 VDC
Class 2 / LPS
≤1 V
pp
Current consumption <500 mA
(max. starting current)
Power consumption
(depending on supply voltage)
≤1 W
Fuse required 1 AT (slow), automatic reset
(Polyfuse)
The gauge is protected against reverse polarity of the supply
voltage.
Electrical connection 15-pin D-Sub, male
Sensor cable
without switching functions
with switching functions
5-pin plus shielding
9-pin plus shielding
Cable length
≤100 m (0.14 mm² conductor)
For longer cables, larger conductor cross-sections are required
(R
cable
≤ 1.0
Ω).
Grounding concept
Vacuum flange - signal common
→ "Electrical Connection"
Supply common - signal common conducted separately; for dif-
ferential measurement (10
Ω)