# Datasheet SPM-100802-LC
URL: https://irs.systems/en/docs/switching-platform/datasheet-spm-100802-lc
**SPM-100802-LC** – IRS products 119783 SPM-100802-LC-E, 8 Dual channels, 10A, load breakout pcb, and 119912 SPM-100802-LC-P, 8 Dual channels, 10A, load mounting panel; hardware version 1.2.2.
## General Description
The SPM-100802-LC is a medium current 6HU switching module for use inside IRS Switching Platform mainframes. The module topology provides 8 dual load switching channels for max. 10A continuous current with fuse and integrated shunt for current measurement in each channel.
Each channel can be configured via jumper to be a dual or a single channel what provides a max. of 16 single channels for 10A load switching purposes.
For precise current measurements an external current measurement device (e.g. DMM) can be connected to the module and via switching be routed in series into the load path. This allows calibrated current measurements directly in the load path.
Typical tasks are load and supply switching to DUT with flexible and precise current measurement requirements. The module is available with a metal panel for load mounting or a breakout extension for wiring to external placed loads.
## Safety 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.
## Schematic Overview & Pictures
SPM-100802-LC-E (with external load breakout pcb)SPM-100802-LC-P (with metal load mounting panel)SPM-100802-LC-P with load mounting panel & specific load configuration
## Scope of Delivery
SPM-100802-LC-E:
- Switching pcb completely assembled with load breakout pcb
- Frontpanel with breakout connectors and all required cable side connectors
SPM-100802-LC-P:
- Switching pcb completely assembled with metal load panel
- Frontpanel closed, no connector breakouts
Standard delivery configuration is “blank” means without loads, shunts or CT modules and all channel jumpers configured to “bridge”, means 16x single channels.
Specific configurations with defined loads, shunts and/or CT modules are possible on request, also customer specific ID configurations can be defined at IRS to provide always same configurations.
## Certification & Compliance
| Item | Value |
| --- | --- |
| Certification of conformity | CE mark by IRS |
| RoHS Compliance | EU RoHS directive 2011/65/EU; Directive (EU) 2015/863 Annex II |
## Used Abbreviations
| Abbreviation | Meaning | Description |
| --- | --- | --- |
| SP | Switching Platform | a general term for all Switching Platform products |
| SPB | Backplane Interface | Interface card for SP Mainframe (e.g. SP-1200) |
| SPC | Switching Platform Controller | 3HU µC card that controls a Switching Platform Module |
| SPM | Switching Platform Module | 6HU pcb with relays and other circuits controlled by a SPC-64 µController card |
| SPW | Switching Platform Wiring | standardized cable from a SPM to system interface |
| DUT | Device Under Test | same as UUT (unit under test) |
| CT | Current Transducer | inductive current measurement device |
| HU | Height Unit = 44,45 mm | |
| HP | Horizontal Pitch = 5,04 mm | |
## Electrical
### Load Channel Specification
| Item | Value | Remarks |
| --- | --- | --- |
| Rated Voltage | 60 Vdc | stationary |
| Rated Current / Channel | 10 A | stationary |
| Rated Current / Power Bus | 18 A | stationary |
| Switching Power (resistive load) | 10 A at <25V; 2 A at 25-40V; 0,75A at 40-60V | -> hot switching reduces lifetime ! |
| Fuse / Channel | 10 A | fast |
This values include the complete load channel incl. all components (connectors, pcb routes, fuse, current transducer, ..).
### Relay 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.
| Item | Value | Remarks |
| --- | --- | --- |
| Max. Current | 16 A | stationary |
| Max. Voltage | 300 V | DC stationary |
| Switching Power (resistive load) | 0,75 A at 60 Vdc; 16 A at <25 Vdc | hot switching reduces lifetime! |
| Operating Time | max. 8 ms | excl. bouncing time |
| Mechanical Life | > 30x10^6 cycles | without el. load |
## Mechanical
| Item | Value | Remarks |
| --- | --- | --- |
| Width | 6 HP | = 30,24 mm; standard width (1 slot) |
| Width | 12 HP | = 60,48 mm; double width (2 slots) |
| Height | 6 HU | = 266,7 mm |
| Depth | ~ 365 mm | total depth of card incl. front handles and rear side connectors |
| Weight | ~ 1,060 kg | |
## Environment
| Item | Value | Remarks |
| --- | --- | --- |
| Operating Temperature Range | 0..55 °C; 32..131 °F | |
| Operating Humidity Range | 10-80 % | non condensing |
## Topology & Functions
| Item | Value | Description |
| --- | --- | --- |
| Nr. of channels | 8 | dual load channels configurable to 16 single load channels |
| Loads / Channel | 1 / 2 | loads per channel, (single / dual configuration) |
| Fused Channels | 8 | 8 channels, fast fuse |
| Integrated Current Measurement | yes, Shunt / CT | Shunt resistor (50mOhm standard) or alternative current transducer on 8 channels |
| Sense 1 connect | Ch. 1,2,3,4 | shunts or CT‘s can connect to Sense Bus 1 |
| Sense 2 connect | Ch. 5,6,7,8 | shunts or CT‘s can connect to Sense Bus 2 |
| Sense 3 connect | Ch. 1,2,3,4 | shunts or CT‘s can connect to Sense Bus 3 |
| Sense 4 connect | Ch. 5,6,7,8 | shunts or CT‘s can connect to Sense Bus 4 |
| Load Options | -P | Metal load mounting panel for onboard loads |
| Load Options | -E | External load breakout pcb with clamps |
| User ID | Yes | Via SP-Editor a user defined identification string will be stored in modules EEPROM (e.g. Load ID, ..) |
| Memory Objects | Yes | Via SP-Editor memory objects can be defined and stored in modules EEPROM (e.g. calibration data, additional module information, ..); max. 6kB |
| Load Relay Cycle Counter | Yes | switching cycle of each relay is counted and stored in modules EEPROM; status can be read via SW command |
| Max. onboard Load Height | <25 mm | SPM width = 1 slot (6 HP) |
| Max. onboard Load Height | <55 mm | SPM width = 2 slots (12 HP) |
## Sense Bus Measurement
### Shunts & Current Transducers in General
If SP modules provide integrated shunts or current transducers, they are an additional feature to measure the current in a load channel. This current measurement has limited precision and is not a calibrated measurement device.
If required, the user has to care about calibration and precision verification of shunts or current transducers.
### Sense Bus Topology & Data
The internal 8 wire Sense Busses 1-4 (each Sense+ and Sense-) is located on the complete backplane of the mainframe, connecting all module slots. The 4 sense busses can be connected via 4x SMB sockets on the Backplane Interface card (SPB) to external measurement devices (e.g. to measurement matrix).
On every module inside the mainframe shunts or current transducers (CT) on the load channels can be connected to the Sense Busses 1-4 by closing the corresponding sense relays on the module.
The firmware verifies that only one sense relay is connected to a sense bus at the same time. If already another channel is connected, the API switching function responds an error.
This topology allows in general 4 parallel measurements inside the SP mainframe. Not all load channels can be switched to every sense bus, possible connections are defined in the module’s datasheet.
Using multiple mainframes, the user needs to define if each of the mainframes has a separate sense bus or if they share the same sense bus. Sharing needs to be done outside of the SP mainframe by connecting all sense busses of all mainframes.
### Current Measurement Options
The SPM-100802-LC provides flexible current configuration options on each channel:
- Shunt resistor configuration: shunt resistor in different value and precision are available, e.g. 0,01 .. 10Ohm; 0,01..0,5%. Standard value: 0,05Ohm, 0,5%, 3W
- Current transducer configuration: CT module with range -10A..10A, 0,8% recommended for dynamic signals
- In-Line current measurement by e.g. DMM, switchable in series into load path for high precision and calibrated load current measurements
| Item | Value | Description |
| --- | --- | --- |
| Nr. of channels with shunt / CT module | 8 | each channel (Ch.1-8) can be configured with a current transducer instead of a shunt |
| Nr. of channels with in-line DMM relay | 8 | each channel (Ch.1-8) provides DMM in-line switching into the load path |
| Sense Bus Access | 4x SMB on SPB: core: Sense +, shield: Sense - | All 8 sense bus lines can be accessed via Backplane Interface card (SPB) on 4x SMB sockets (isolated mounted) |
| Sense Bus 1 connect to | Ch. 1,2,3,4 | the sense lines of this channel can be switched to Sense-Bus #1 |
| Sense Bus 2 connect to | Ch. 5,6,7,8 | the sense lines of this channel can be switched to Sense-Bus #2 |
| Sense Bus 3 connect to | Ch. 1,2,3,4 | the sense lines of this channel can be switched to Sense-Bus #3 |
| Sense Bus 4 connect to | Ch. 5,6,7,8 | the sense lines of this channel can be switched to Sense-Bus #4 |
Optional LEM Sensors instead of shunts:
| Item | Value | Description |
| --- | --- | --- |
| Current Transducer Range | ± 10,2 A | Current range in both directions |
| Sensitivity | 208,4 mV/A | output voltage range: Offset: +2,50 V (=0A) +/- 2,125 V (=10,2A) total output range 0.375V ... 4.625 (+/- 10,2A); e.g. 1A = 2,708V; 8A = 4,167V ; -6A = 1,250V |
| Precision at 25°C (77°F) | ± 0,8% (± 0,05A) | total output error of CT module at 25°C |
| Precision at 25°C (77°F) | ± 0,40% (± 0,025A) | with autozero function after switching ON |
| Precision at 85°C (185°F) | ± 1,8 % (± 0,108A) | total output error over temp. Range |
| Frequency Bandwidth | 200 kHz | +/- 1dB (1kOhm load) |
| Frequency Bandwidth | 300 kHz | +/- 3dB (1kOhm load) |
### Autozero Function
Each current transducer has an offset on the output voltage when switched supply voltage to ON This happens when switching ON the mainframe or at startup of the complete test system. This offset is constant until the current transducers supply voltage is switched OFF. This happens when switching OFF the mainframe or at shutdown of the complete test system. This offset variation is included in the total output error calculation of the current transducer’s datasheet.
A correction of this constant offset error (for the power ON phase) will improve the precision of the current transducer significant. To eliminate this offset error the SP software provides the API function “Autozero” of channels. This function also is available on the test panel of the module.
The function needs to be executed when the current is definitely “0”, means really *no* current is detected by the current transducer, e.g. in case the load channel is switched to open.
The recommendation is to use the autozero function minimum on each first run after system started, if it is possible execute autozero in every test sequence run.
## Component Location
| No. | Component |
| --- | --- |
| 1 | load channel relays Ch. 1.1 – Ch. 8.2 |
| 2 | Shunt/LEM and channel configuration Ch. 1.1 – Ch. 8.1 |
| 3 | DMM inline relay Ch. 1.1 – Ch. 8.1 |
| 4 | Fuse 10A for Ch. 1.1 – Ch. 8.1 |
| 5 | Sense Bus relays Ch. 1.1 – Ch. 4.1 to Sense 1 and Sense 3; Ch. 5.1 – Ch. 8.1 to Sense 2 and Sense 4 |
| 6 | Serialnumber and quality check labels |
## Channel configuration
Each channel of the card can be configured via the blue jumpers to load or bridge topology:
**Load:** The second channel (X.2) is connected to first channel (X.1) for dual load configuration (2 loads on channel X.1)
**Bridge:** The second channel (X.2) is bypassing first channel (X.1) for single load Configuration (X.2 channel without shunt and fuse)
The jumper schematic is shown on the pcb: middle to left connected is “Load”, middle to right connected is “Bridge”.
## Connectivity
SPM-100802-LC connector X2:
| Pin | d | b | z |
| --- | --- | --- | --- |
| 2 | DMM+ | DMM+ | DMM- |
| 4 | Ch. 1.1 | Ch. 1.1 | DMM- |
| 6 | Ch. 1.2 | Ch. 1.2 | Ch. 2.1 |
| 8 | Ch. 2.2 | Ch. 2.2 | Ch. 2.1 |
| 10 | Ch. 3.1 | Ch. 3.1 | Ch. 3.2 |
| 12 | Ch. 4.1 | Ch. 4.1 | Ch. 3.2 |
| 14 | Ch. 4.2 | Ch. 4.2 | Ch. 5.1 |
| 16 | Ch. 5.2 | Ch. 5.2 | Ch. 5.1 |
| 18 | Ch. 6.1 | Ch. 6.1 | Ch. 6.2 |
| 20 | Ch. 7.1 | Ch. 7.1 | Ch. 6.2 |
| 22 | Ch. 7.2 | Ch. 7.2 | Ch. 8.1 |
| 24 | Ch. 8.2 | Ch. 8.2 | Ch. 8.1 |
| 26 | PB1 | PB1 | PB1 |
| 28 | PB2 | PB2 | PB2 |
| 30 | PB3 | PB3 | PB3 |
| 32 | PB4 | PB4 | PB4 |
*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:
| Item | Value | Remarks |
| --- | --- | --- |
| Max. current | 6 A | per connector pin |
| Used pins | 2 | pins used per channel and DMM |
| Used pins | 3 | pins used per Power Bus |
| Wire cross sections | AWG 16 / 1,5 mm² | per load channel wire |
| Wire cross sections | AWG 14 / 2,5 mm² | per Power Bus wire |
> **Note**
> System side cables to fixture interface can be defined and produced by IRS on request.
## Sparepart List
| Manufacturer / Supplier | Part Nr. | IRS Part Nr. | Component Description |
| --- | --- | --- | --- |
| Littelfuse | 0154010.DR | `118580` | Fuse 10A, SMD |
| TE Connectivity | RTD34024 | `118581` | Load channel relay 16A |
| Panasonic | AGN20024 | `105776` | Sense-Bus relay |
| Finder | 44.62.9.024.0000 | `115599` | DMM In-line relay |
| LEM | CASR 6-NP | `109760` | Optional: current transducer 6A |
| Phoenix Contact | SPC 5/ 6-STF-7,62 | `119290` | Cable side load breakout connector for power bus & DMM (for „-E“ load breakout pcb) |
| Phoenix Contact | MSTB 2,5/16-STF-5,08 | `118583` | Cable side load breakout connector for Load channels (for „-E“ load breakout pcb) |
| Isabellenhütte | PBV-R05-F1-0,5% | `112652` | Optional: Shunt 0R05, 3W, 0,5% |
## Product Support
- IRS Homepage: [www.irs.systems](https://www.irs.systems/)
- Email Contact: info@irs.systems
