Digital Inputs - Carel k.Air User Manual

k.Air +030220981 rel. 1.1 – 31.03.2020

3.6.2 Digital inputs

The controller features digital inputs for monitoring safety devices, alarms, device states and remote
enabling signals. See manual +0300057EN. Maximum connection cable length: k.Air mini 10 m, k.Air large
30 m.
Important:
the k.Air controller does not provide any protection, limitation or functional safety for the
l
controlled devices.
separate as much as possible the probe and digital input cables from cables to inductive loads and
l
power cables, so as to avoid possible electromagnetic disturbance. Never run power cables
(including the electrical panel cables) and signal cables in the same conduits;
the external contact for digital inputs must be rated to at least 5 mA.
l
Maximum number of digital inputs that can be connected
Digital inputs
voltage-free contacts (not opto-isolated)
24 Vac or 28-36 Vdc optically-isolated inputs
24 Vac or 230 Vac (50 Hz) optically-isolated inputs
Characteristics of digital inputs ID...IDH...
Minimum digital
input pulse Normally open (open-closed-open): 200 ms; Normally closed (closed-open-closed): 400 ms
detection time
k.Air mini - Internal; k.Air large -External
Input power
IDH...: 230 Vac (+10/-15%) 50/60 Hz, current draw 5 mA
supply
ID...: 24 Vac (+10/-15%) 50/60 Hz or 28-36 Vdc (+10/-20%), current draw 5 mA
Maximum
connection cable k.Air mini 10 m; k.Air large 30 m
length
Measurement
circuit
Category I: 24 Vac/Vdc (J5, J7, J20); Category III: 230 Vac (J8, J19)
classification (IEC
EN 61010-1)
Important:
the two 230 Vac or 24 Vac/Vdc inputs on terminals J8 (ID13, ID14) or J19 (ID15, ID16) have the
l
same common pole and therefore both must have the same voltage (230 Vac or 24 Vac/Vdc). The
insulation between the two inputs is functional; there is reinforced insulation between the inputs
and the rest of the controller;
ID1-ID8, ID9-ID12, ID17, ID18 have functional insulation from the rest of the controller;
l
for inputs with direct current voltage (24 Vdc), either the + or - can be connected to the common
l
terminal;
k.Air mini k.Air large
2
0 max tot 18 14
0 4
3. Hardware installation | 31
ENG
c.pCOe
0
0
0
Tab.3.m
Tab.3.n