Saia-Burgess Controls AG
Manual I/O-modules for PCD1 │ PCD2 series │ Document 27-600 – Release ENG09 │ 2019-05-01
6-39
I/O modules PCD3
PCD3.A251
6
6.5.4 PCD3.A251, 8 relays, 6 with changeover contacts,
2 with make contacts
Application
The module contains 8 relays for direct or alternating current up to 2 A, 48 VAC.
6 of them have changeover contacts and 2 of them make contacts. The module is
especially suited wherever AC switching circuits with infrequent switching have to
be controlled. For space reasons, there is no integrated contact protection.
Technical data
Number of outputs: 6 changeover contacts and 2 make contacts.
Relay type: RE 014024, SCHRACK
Operating mode: > 12 V, > 100 mA
Switchingcapacity:*)
(contact lifetime)
2A, 48 VAC AC1 0.7 x 10
6
operations
1 A, 48 VAC AC11 1.0 x 10
6
operations
2 A, 50 VDC DC1 0.3 x 10
6
operations
3)
1 A, 24 VDC DC11 0.1 x 10
6
operations
1)3)
Relay coil supply:
2)
nominal 24 VDC smoothed or pulsed,
8 mA per relay coil
Voltage tolerance, dependent on ambi-
ent temperature:
20°C: 17.0…35 VDC
30°C: 19.5…35 VDC
40°C: 20.5…32 VDC
50°C: 21.5…30 VDC
Output delay: typically 5 ms at 24 VDC
Resistance to interference:
acc. to IEC 801-4
4 kV under direct coupling
2 kV under capacitive coupling (whole trunk group)
Internal current consumption:
(from +5 V bus)
1…25 mA
typically 15 mA
Internal current consumption:
(from V+ bus)
0 mA
External current consumption: max. 64 mA
Terminals: Pluggable 24-pole spring terminal block (4 405 4956 0), for Ø
up to 1 mm²,
1)
With external protective diode
2)
With reverse voltage protection
3)
These ratings are not UL-listed
*) Higher voltages are not allowed for this module because clearances between circuit paths
too small.
The Annex, Section A.3 "Relay contacts" contains measurement details and suggested wir-
ingfortherelaycontacts.Forsafeswitchingandalongservicelife,theseguresmustbe
observed.
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