Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Digital output modules
Input/output (I/O) modules
6-36
6
6.5.4 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 V
AC
. 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 shared terminal
Type of relay (typical):
RE 030024, SCHRACK
Operating mode:
> 12 V, > 100 mA
Switching capacity: *)
(contact lifetime)
2 A, 48 V
AC
AC1
0.7 x 10
6
operations
1 A, 48 V
AC
AC11
1.0 x 10
6
operations
2 A, 50 V
DC
DC1
0.3 x 10
6
operations
3)
1 A, 24 V
DC
DC11
0.1 x 10
6
operations
1)3)
Relay coil supply:
2)
nominal 24 V
DC
smoothed or pulsed, 8 mA per relay
coil
Voltage tolerance, dependent on
ambient temperature:
20 °C: 17.0
…
35 V
DC
30 °C: 19.5
…
35 V
DC
40 °C: 20.5
…
32 V
DC
50 °C: 21.5
…
30 V
DC
Output delay:
typically 5 ms at 24 V
DC
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
typ. 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 clearances between circuit
paths too small.
The Annex, Section A.4 "Relay contacts" contains measurement details and suggested
wiring for the relay contacts. For safe switching and a long service life, these figures must be
observed.
