Digital Outputs; Solid State Relay (Ssr) Digital Outputs - Carel pCO5+ User Manual

ENG

5.6 Digital outputs

Electromechanical relay digital outputs
The controller features digital outputs with electromechanical relays. For
ease of installation, the common terminals of some of the relays have
been grouped together.
The type of insulation is described in the table below. See also the
Technical Specifi cations table.
Type of insulation
Between relays in the same group operational insulation
Between groups of relays
Between relays and the rest of the
controller
Notes:
•
inside each group, the relays have just
therefore have the same voltage (generally 24 Vac or 110/230 Vac);
•
between groups there is reinforced insulation
have diff erent voltages.
Example of connection diagram (LARGE model):
N
L
J12 J13 J14
4 3 2 1
J25 BMS2 J26 FBus2
N
L
J15
J13 J14
4 3 2 1
J21
S2 J26 FBus2
Important: The current on the common terminals must not
exceed the capacity (rated current) of each single terminal (8A).
Some relays have change-over contacts.
Relays with change-over contacts
Small Medium / Extralarge
Output No. 8
Remote connection of digital outputs
The table below shows the cable sizes required according to the current.
Cross-section (mm2)/AWG
0,5/20
1,5/15
2,5/14
Note: When diff erent relay outputs must be operated consecutively
at very close intervals (e.g. star-delta motor starter) in the order of
hundreds of ms, use relays belonging to the same group, according to
the following table.
pCO5plus +0300020EN rel. 1.2 - 07.11.2013
reinforced insulation
reinforced insulation
insulation and must
operational
, so diff erent groups can
J15
J16 J17
J21 J22
J23 FBus2
Fig. 5.u
J16 J17
J22
J23 FBus2
Fig. 5.v
pCO5+ model
Large
8, 12, 13 8, 12, 13
Current (A)
2
6
8
RELAY GROUPS FOR CONSECUTIVE COMMANDS (~100 ms)
1 2
Relè 1, 2, 3, 4 5, 6, 7, 8
Important: Using relays that belong to diff erent groups can cause
delays in switching.

5.7 Solid state relay (SSR) digital outputs

pCO5+ controllers are also available in versions with solid-state relays
(SSR) for controlling devices that require an unlimited number of
switching cycles that would not be supported by electromechanical
relays. These outputs are dedicated to resistive loads powered at 224Vac
SELV or 28 to 36 Vdc SELV with max. load current up to 1A or 230 Vac with
max. load current up to 70mA.
Example 1: Connection diagram for resistive load.
J18
Example 2: Connection diagram for inductive or resistive loads, with max.
load current <1 A.
J18
(*) Dedicated power supply or same power supply as controller: not in
common with the power supply for other external loads (e.g. contactors,
coils).
Important: In applications with SSR outputs:
1. the controller should drive only resistive loads with loads current less
than maximum declared;
2.
use an additional external SSR to drive inductive loads;
3. for AC power supply to resistive loads or external SSRs,
4.
use the same power supply as the controller (connected to terminals
G/G0), which must be dedicated and not in common with the power
supply to other devices in the electrical panel (contactors, coils, etc.)
Note: The SSR load is powered at 24 Vac SELV, 28 to 36 Vdc SELV or
230 Vac; consequently all the other terminals in the group must be
powered at the same voltage due to the absence of reinforced insulation
within the group.
34
4 - 4 -
3 pCO5+ pCO5+ Extra-
Large Large
9, 10, 11, 14, 15, 16, 14, 15, 16, 17,
12, 13 17, 18 18, 19, 20, 21
Fig. 5.w
SSR ESTERNO/
carico/load
EXTERNAL SSR
Fig. 5.x
5
22, 23, 24, 25,
26, 27, 28, 29
Tab. 5.d