Saia-Burgess Controls AG
Manual I/O-modules for PCD1 │ PCD2 series │ Document 27-600 – Release ENG09 │ 2019-05-01
5-40
I/O modules PCD1|PCD2
PCD2.A250
5
5.5.4 PCD2.A250, 8 relays with make contacts, without contact protection
Application
The module contains 8 relays with normally-open contacts for direct or alternating
current up to 2 A, 48 VAC. 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: 4 + 4 make contacts with common terminal
Type of relay (typical): RE 030024, SCHRACK
Operating mode: > 12 V, > 100 mA
Switchingcapacity:*)
(contact lifetime)
2 A, 48 VAC AC1 0.7 × 10
6
operations
1 A, 48 VAC AC11 1.0 × 10
6
operations
2 A, 50 VDC DC11 0.3 × 10
6
operations
3)
1 A, 24 VDC DC11 0.1 × 10
6
operations
1)3)
Relay coil supply:
2)
nominal 24 VDC smoothed or pulsed,
8 mA per relay coil
Voltage tolerance, dependent on
ambient 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 14-pole screw terminal block
(4 405 4869 0), for wires up to 0.6 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 safety standards for clear-
ance and creepage distances do not apply.
In the appendix, Chapter A.4 relay contacts, are calculation data and wiring sug-
gestions for the relay contacts. These data should be absolutely considered for
safe switching and a long life span of the relays.
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