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Chapter 4 · Switching Platform

Datasheet SPM-026401-LC

SPM-026401-LC – IRS product 119786 SPM-026401-LC-E, 64 Single channels, 2A, load breakout pcb; hardware version 1.00.

4.1General Description

The SPM-026401-LC is a low current 6HU switching module for use inside IRS Switching Platform mainframes. The module topology provides 64 single load switching channels for max. 2A continuous current.

Each of the 64 channels can be used in three basic configurations:

  • Form A, Channel to Common normally open contact
  • Load switching between Channel to Common
  • Load switching between Channel to Power Busses 1..4 (e.g. GND, Vcc, ..)

This channel configurations are done on the breakout & load mounting extension pcb.

Typical tasks are flexible load, measurement and supply switching to DUT pins up to 2A current. The module provides a load mounting and breakout pcb including a connector for wiring to external devices or loads.

4.2Safety Instructions

  • Only for use in IRS Switching Platform mainframes (e.g. SP-1200) and within the specified electrical limits.
  • Use only inside suitable 19‘‘-Cabinets and not for applications to humans or animals.
  • Use this SP module only with the SPC-64 µController card (PN: 120701) and with the SP-Editor SW and its API commands for configuration and control
  • Hot switching is NOT recommended on any circuit of the module. This will reduce the lifetime and maximum switching cycles of the relays and possibly destroy the relays on the module.
  • The module is designed for resistive loads, user has to care about protection circuitry when using inductive or capacitive loads
  • Outputs need sufficient isolation and protection against contact.

4.3Schematic Overview & Pictures

SPM-026401-LC (64 channels each 1 load, max. 2A): control and switch PCB with diagnostics, breakout and load mounting pcb with short load jumpers, load resistors max. 2W, external load access and power busses PB 1–4
SPM-026401-LC-E (with external breakout & load mounting pcb)
SPM-026401-LC-E circuit board with relays and breakout and load mounting pcb
SPM-026401-LC-E

4.4Scope of Delivery

SPM-026401-LC-E:

  • Switching pcb completely assembled with breakout & load mounting pcb
  • Frontpanel with breakout connectors and all required cable side connectors

4.5Certification & Compliance

ItemValue
Certification of conformityCE mark by IRS
RoHS ComplianceEU RoHS directive 2011/65/EU; Directive (EU) 2015/863 Annex II

4.6Used Abbreviations

AbbreviationMeaningDescription
SPSwitching Platforma general term for all Switching Platform products
SPBBackplane InterfaceInterface card for SP Mainframe (e.g. SP-1200)
SPCSwitching Platform Controller3HU µC card that controls a Switching Platform Module
SPMSwitching Platform Module6HU pcb with relays and other circuits controlled by a SPC-64 µController card
SPWSwitching Platform Wiringstandardized cable from a SPM to system interface
DUTDevice Under Testsame as UUT (unit under test)
CTCurrent Transducerinductive current measurement device
HUHeight Unit = 44,45 mm
HPHorizontal Pitch = 5,04 mm

4.7Electrical

4.7.1Load Channel Specification

ItemValueRemarks
Rated Voltage60 Vdcstationary
Rated Current / Channel2 Astationary
Rated Current / Power Bus10 Astationary
Switching Power (resistive load)2 A at <30 V; 1 A at <60 V-> hot switching reduces lifetime !
Fuse / Channel- no fuse -channels are not fused
Channel Resistance700–900 mOhmtypical value between X2 Ch.x and COM Ch. x incl. breakout pcb

This values include the complete load channel incl. all components (connectors, pcb routes, fuse, current transducer, ..).

4.7.2Relay Specification

The current and voltage ratings of the relay are shown for information only. The “Load Channel Specification“ table shown above has to be used when creating a circuit using this module. The ratings in the “Load Channel Specification“ table are lower than the ratings for the relay by itself.

ItemValueRemarks
Max. Current2 Astationary
Max. Voltage220 VDC stationary
Switching Power (resistive load)2 A at <30 V; 1 A at <60 V; 0,3 A at 220Vdchot switching reduces lifetime!
Operating Timemax. 4 msexcl. bouncing time
Mechanical Life> 1x10^8 cycleswithout el. load

4.8Mechanical

ItemValueRemarks
Width6 HP= 30,24 mm; standard width (1 slot)
Height6 HU= 266,7 mm
Depth~ 365 mm
Weight~0,825 kgIncl. cable side breakout connector

4.9Environment

ItemValueRemarks
Operating Temperature Range0..55 °C; 32..131 °F
Operating Humidity Range10-80 %non condensing

4.10Topology & Functions

ItemValueDescription
Nr. of channels64Single channels, form A contact (com – no)
Loads / Channel1Load per channel
Fused Channels- no fuse -Channels not fused
Internal Diagnosticyes, readback2nd relay contact allows readback of switching state via API command and internal diagnostic to verify contact functionality; incl. report generation
Load Options-EExternal breakout & load placement pcb
User IDYesVia SP-Editor a user defined identification string will be stored in modules EEPROM (e.g. Load ID, ..)
Memory ObjectsYesVia SP-Editor memory objects can be defined and stored in modules EEPROM (e.g. calibration data, additional module information, ..); max. 6kB
Load Relay Cycle Counteryesswitching cycle of each relay is counted and stored in modules EEPROM; status can be read via SW command
Load PlacementOn pcbResistors up to 2W can be soldered on the breakout pcb

The breakout pcb provides already 64 blue jumper connectors for the form A configuration (using channels as a form A relay COM-NO). By removing this short bridge, the load channel is open and requires a load resistor soldered on the pcb.

4.11Sense Bus Measurement

No current measurement and Sense Bus available on this module.

4.12Component Location

Component location on the SPM-026401-LC pcb: channel relays, labels, short/load areas for odd and even channels, short bridge area for power bus connections, connectors X2 and X3

No.Component
1Channel relays 1 - 64
2Serial number and quality check labels
3Short/load area for channels 1 – 63 (odd numbers)
4Short/load area for channels 2 – 64 (even numbers)
5Short bridge area for channels short to power busses connections

4.13Connectivity

4.13.1DUT Side Connector Pinout

X2 connector of the SPM-026401-LC

SPM-026401-LC connector X2:

Pin rowabcde
1PB1Ch. 1Ch. 2Ch. 3Ch. 4
2PB1Ch. 5Ch. 6Ch. 7Ch. 8
3PB1Ch. 9Ch. 10Ch. 11Ch. 12
4PB1Ch. 13Ch. 14Ch. 15Ch. 16
5PB1Ch. 17Ch. 18Ch. 19Ch. 20
6PB1Ch. 21Ch. 22Ch. 23Ch. 24
7PB1Ch. 25Ch. 26Ch. 27Ch. 28
8PB1Ch. 29Ch. 30Ch. 31Ch. 32
9PB2Ch. 33Ch. 34Ch. 35Ch. 36
10PB2Ch. 37Ch. 38Ch. 39Ch. 40
11PB2Ch. 41Ch. 42Ch. 43Ch. 44
12PB2Ch. 45Ch. 46Ch. 47Ch. 48
13PB2Ch. 49Ch. 50Ch. 51Ch. 52
14PB2Ch. 53Ch. 54Ch. 55Ch. 56
15PB2Ch. 57Ch. 58Ch. 59Ch. 60
16PB2Ch. 61Ch. 62Ch. 63Ch. 64
17PB3COM Ch. 1COM Ch. 2COM Ch. 3COM Ch. 4
18PB3COM Ch. 5COM Ch. 6COM Ch. 7COM Ch. 8
19PB3COM Ch. 9COM Ch. 10COM Ch. 11COM Ch. 12
20PB3COM Ch. 13COM Ch. 14COM Ch. 15COM Ch. 16
21PB3COM Ch. 17COM Ch. 18COM Ch. 19COM Ch. 20
22PB3COM Ch. 21COM Ch. 22COM Ch. 23COM Ch. 24
23PB3COM Ch. 25COM Ch. 26COM Ch. 27COM Ch. 28
24PB3COM Ch. 29COM Ch. 30COM Ch. 31COM Ch. 32
25PB4COM Ch. 33COM Ch. 34COM Ch. 35COM Ch. 36
26PB4COM Ch. 37COM Ch. 38COM Ch. 39COM Ch. 40
27PB4COM Ch. 41COM Ch. 42COM Ch. 43COM Ch. 44
28PB4COM Ch. 45COM Ch. 46COM Ch. 47COM Ch. 48
29PB4COM Ch. 49COM Ch. 50COM Ch. 51COM Ch. 52
30PB4COM Ch. 53COM Ch. 54COM Ch. 55COM Ch. 56
31PB4COM Ch. 57COM Ch. 58COM Ch. 59COM Ch. 60
32PB4COM Ch. 61COM Ch. 62COM Ch. 63COM Ch. 64

X2 connector layout for cable to DUT/Adapter

For cabling to system’s receiver interface or to DUT Adapter following data needs to be considered:

ItemValueRemarks
Max. current2 Aper connector pin
Used pins1pin used per channel
Used pins8pins used per Power Bus
Wire cross sectionsAWG 20 / 0,35 mm²per channel wire
Wire cross sectionsAWG 16 / 1,5 mm²per power bus wire

4.13.2Breakout Connector Pinout

Cable side breakout connector (ERNI) incl. 160 pins (ERNI 234063) delivered with the SP-Module:

Cable side breakout connector kit and X3 connector of the SPM-026401-LC

SPM-026401-LC connector X3 (Load Breakout):

Pin rowabcde
1PB1COM Ch. 61COM Ch. 62COM Ch. 63COM Ch. 64
2PB1COM Ch. 57COM Ch. 58COM Ch. 59COM Ch. 60
3PB1COM Ch. 53COM Ch. 54COM Ch. 55COM Ch. 56
4PB1COM Ch. 49COM Ch. 50COM Ch. 51COM Ch. 52
5PB1COM Ch. 45COM Ch. 46COM Ch. 47COM Ch. 48
6PB1COM Ch. 41COM Ch. 42COM Ch. 43COM Ch. 44
7PB1COM Ch. 37COM Ch. 38COM Ch. 39COM Ch. 40
8PB1COM Ch. 33COM Ch. 34COM Ch. 35COM Ch. 36
9PB2COM Ch. 29COM Ch. 30COM Ch. 31COM Ch. 32
10PB2COM Ch. 25COM Ch. 26COM Ch. 27COM Ch. 28
11PB2COM Ch. 21COM Ch. 22COM Ch. 23COM Ch. 24
12PB2COM Ch. 17COM Ch. 18COM Ch. 19COM Ch. 20
13PB2COM Ch. 13COM Ch. 14COM Ch. 15COM Ch. 16
14PB2COM Ch. 9COM Ch. 10COM Ch. 11COM Ch. 12
15PB2COM Ch. 5COM Ch. 6COM Ch. 7COM Ch. 8
16PB2COM Ch. 1COM Ch. 2COM Ch. 3COM Ch. 4
17PB3Ch. 61Ch. 62Ch. 63Ch. 64
18PB3Ch. 57Ch. 58Ch. 59Ch. 60
19PB3Ch. 53Ch. 54Ch. 55Ch. 56
20PB3Ch. 49Ch. 50Ch. 51Ch. 52
21PB3Ch. 45Ch. 46Ch. 47Ch. 48
22PB3Ch. 41Ch. 42Ch. 43Ch. 44
23PB3Ch. 37Ch. 38Ch. 39Ch. 40
24PB3Ch. 33Ch. 34Ch. 35Ch. 36
25PB4Ch. 29Ch. 30Ch. 31Ch. 32
26PB4Ch. 25Ch. 26Ch. 27Ch. 28
27PB4Ch. 21Ch. 22Ch. 23Ch. 24
28PB4Ch. 17Ch. 18Ch. 19Ch. 20
29PB4Ch. 13Ch. 14Ch. 15Ch. 16
30PB4Ch. 9Ch. 10Ch. 11Ch. 12
31PB4Ch. 5Ch. 6Ch. 7Ch. 8
32PB4Ch. 1Ch. 2Ch. 3Ch. 4

X3 connector layout for cable to external loads

For cabling to breakout interface following data needs to be considered:

ItemValueRemarks
Max. current2 Aper connector pin
Used pins1pin used per channel
Used pins8pins used per Power Bus
Wire cross sectionsAWG 20 / 0,35 mm²per channel wire
Wire cross sectionsAWG 16 / 1,5 mm²per power bus wire

4.14Relay State Readback

The second contact of cross point relay is card internally used for switching state indication. Via API command the state of cross point relay(s) can be read back.

Request Builder with the Read command of the relay functional group

4.15Diagnostics & Selftest

The SPM-026401-LC provides an internal selftest sequence that switches each single load channel relay and verifies the switching state. After performing the selftest sequence a report is generated that can be stored by user for documentation purposes.

Start Switching Platform Editor SW – (1) login as developer – (2) load project configuration file or add new mainframe with autodetect – (3) connect SP mainframe – (4) select slot with SPM-026401-LC card – (5) select “Slot Config” Tab and “Module” – (6) select “Selftest” – (7) run selftest by pressing blue arrow – (8) review/save selftest report

SP Editor with steps 1 to 8 for running the selftest and the test execution report

4.16Load Configuration Examples

Load board of the SPM-026401-LC with configuration examples: channels 41..64 used as form A SPST contacts, load resistors on channels 2, 4, 6 and 40 connected to COM2, PB1 or PB4

Labels in the picture:

  • Load configuration pads for channels 1..63 (odd) and 2..64 (even); 64 Short Jumpers included
  • Load resistor side A pads; Load resistor side B pads
  • Connector for external load access cable included
  • Channels to Power Bus configuration pads
  • Ch. 41..64 used as Form A SPST contacts without loads (jumpers connected)
  • Ch. 40: Load Resistor with side B connected to PB1 (side A connects to DUT)
  • Ch. 2: Load Resistor with side B connected to COM2 (back to DUT), No PB connection set
  • Ch. 4: Load Resistor with side B connected to PB1
  • Ch. 6: Load Resistor with side B connected to PB4

Load scenarios: general purpose form A relay contacts, load between DUT pins, load to power bus, external loads

4.17Sparepart List

Manufacturer / SupplierPart Nr.IRS Part Nr.Component Description
PanasonicTX2-24V112828Relay 2A, 2 form C, 24Vdc
ERNI024070100205X3 cable side: 160 pin module
ERNI173052103032X3 cable side: cable housing KSG173
ERNI234063101480X3 cable side: Pins (qty. 500)
StäubliKB1-5,08 BLUE112628Connecting Bridges

4.18Product Support

Documents and downloads

Further documents and files for your IRS product are available on myIRS.

Go to downloads