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Data sheet www.sbc-support.com
PCD2.A250
Digital output module, 2 × 4 relays,
48 VAC/2 A or 50 VDC/2 A, 'make' contact, without contact protection
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)
Switching capacity *)
(contact lifetime)
Relay coil supply 2)
Voltage tolerance, dependent on ambient temperature
RE 030024, SCHRACK
2 A, 48 VAC AC1
1 A, 48 VAC AC11
2 A, 50 VDC DC1
0.7 × 10⁶ operations
1.0 × 10⁶ operations
0.3 × 10⁶ operations
1 A, 24 VDC DC11 0.1 × 10⁶ operations
3)
1)3) nominal 24 VDC smoothed or pulsed,
8 mA per relay coil
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
Resistance to interference acc. to IEC 801-4
Internal current consumption
(from +5 V bus) typically 5 ms bei 24 VDC
4 kV under direct coupling
2 kV under capacitive coupling
(whole trunk group)
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 clearance and creepage distances do not apply.
LEDs and connection terminals
A4
A5
A7
A6
A0
A1
A3
A2
Bus connector
Bus interface
Relay
13 12 11 10 9 8
C4 - 7 C0 - 3
7 6 5 4 3 2 1 0
A7 A6 A5 A4 A3 A2 A1 A0
LEDs
Screw terminals
Relay contacts
Supply 24 VDC for Relay coils
In the manual 27-600_ENG, in the Chapter appendix A.4 relay contacts, are calculation data and wiring suggestions or the relay contacts.
These data should be absolutely considered for safe switching and a long life span of the relays.
Installation instructions
For reasons of safety it is not permissible to connect low voltages (up to 50 V) and higher voltages (50 … 250 V) to the same module.
If a Saia PCD® module is connected to a higher voltage (50 … 250 V), approved components for this voltage must be used for all elements that are electrically connected to the system.
Using higher voltage (50 … 250 V), all connections to the relay contacts must be connected on the same circuit, i.e. in such a way that they are all protected against one AC phase by one common fuse. Each load circuit may also be protected individually. .
Output circuits and terminal designation
Address
LED A7
LED
0
1
2
3
Output
O0
O1
O2
O3
Relay contacts
13 12
24 VDC
11 10 9 8
C4 - 7 C0 - 3
7
A7
6
A6
5
A5
4
A4
3
A3
2
A2
4 relay contacts have one common terminal
1
A1
0
A0
Terminals
Relay energized (contact closed): LED on
Relay reset (contact open): LED off
24 VDC must be connected to the +/- terminals.
Watchdog: This module can be used on all base addresses; there is no interaction with the watchdog on the CPUs. For details, please refer to the “Watchdog” section of the manual 26-856_ENG, which describes the correct use of the watchdog in conjunction with PCD2 components.
I/O modules and I/O terminal blocks may only be plugged in and removed when the Saia PCD® and the external +24 V are disconnected from the power supply.
Ordering information
Type
PCD2.A250
Short description
8 relays with make contacts, without contact protection
Description
Digital output module, 2 × 4 relays, 48 VAC/2 A or 50 VDC/2 A,
'make' contact, without contact protection
Weight
65 g
Accessories
Type
4 405 4869 0
Short description
Plug-in, type M
Description
Plug-in screw terminal block, 14-pin (type M) for wires up to 0.6 mm 2 , labelling 0…13
Weight
9 g
2
Saia-Burgess Controls AG
Bahnhofstrasse 18 | 3280 Murten, Switzerland
T +41 26 580 30 00 | F +41 26 580 34 99 www.saia-pcd.com
[email protected] | www.sbc-support.com
PP31-503 ENG03 10-2016 Technical data and information subject to change.

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