SIM Relay Cards



Pickering Interfaces Series 1000 SIM Reed Relay Cards offer a choice of switching configurations using low cost industry standard SIM connectors. They are ideal for placing switching systems in fixtures close to the unit under test.

SIM Reed Relay Cards free the designer from the detail of routing complex switching circuits, you may select from a wide range of cards using the built in RS-232 and I2C interfaces.
The SIM Relay Cards are intended to be mounted on to a simple motherboard. They may be used to construct very high density switching networks. SIM based switching cards also allow for very simple in-field maintenance. The range is as follows (click on the product description for more details):

Full Range of SIM Relay Cards

 Low Cost Uncommitted Relay, Multiplexer and Matrix Configurations
 With I2C and RS-232 Interfaces
 Simple ASCII Instruction Set
 Use High Quality Pickering Reed Relays
 Suitable For Building High Density Switching Networks
 Standard 72 Pin SIM Connector
 Special Models Available
1010 Series
Uncommitted Relays
1020 Series
1030 Series
8 x SPST
16 x SPST
16 x SPST, Screened
16 x SPDT
8-Chan, 1-Pole
8-Chan, 2-Pole
16-Chan, 1-Pole
16-Chan, 1-Pole, Screened
16-Chan, 2-Pole
8 x 2, 1-Pole
8 x 2, 1-Pole, Screened
8 x 2, 2-Pole
8 x 4, 1-Pole
8 x 4, 1-Pole, Screened
8 x 4, 2-Pole

Automatic Self-Test
A logic only Self-Test is invoked at power on and may also be operated under software command. Self-Test pass is indicated on a PCB mounted LED with a full pass/fail description available via either the I2C or RS-232 interfaces.

All control and signal lines are made using the 72 way SIM connector. There is also a 4-pin plug for connection to the I2C or RS-232 interface. Other connector types may be available.

Software Support
The SIM Relay Cards have a simple ASCII control language (the same commands work with either I2C or RS-232). Pickering also have drivers available to assist with software development and debugging for NI LabView.

Microcontroller Based Design
The SIM Relay Card has a built-in single chip microcontroller. Each SIM Relay Card has a standard hardware selectable I2C or RS-232 interface with read/write capability. Leaded reed relays are used throughout to simplify maintenance operations.


Example configurations for the SIM Reed Relay Card

I2C Communication
The SIM Relay Card uses a message based method of communication with the controller, all data is exchanged through a single read/write register. A DIP switch is provided for I2C addressing. This controls addressing bits 4 to 1, in addition jumpers are available for bits 5 to 7 (if required). All 7 address bits are also available on the SIM connector, allowing the I2C address to be read from the motherboard.
RS-232 Port
The SIM Relay Card can alternatively be configured with an RS-232 port (9600 baud, 8 bit, no parity, no handshaking). This is provided on a 4 pin Molex type connector (a jumper on the PCB selects RS-232 or I2C use for this port). A separate adapter lead to allow use with a standard 9 pin D-type is available. The RS-232 port allows the SIM Relay Card to be controlled and monitored from any RS-232 terminal.
RS-232 to I2C Serial Converter Module
The RS-232 to I2C converter 1080-001 allows control of multiple relay cards that are set for I2C operation. Like the relay cards, the module uses the SIM card mechanical profile.
1050 SIM Relay Card Carrier
The SIM Relay Carrier 1050-001 simplifies the custom integration of SIMRC switching modules. No additional PCB design is necessary. Due to the Eurocard format the carrier can be fitted into a standard case or can be mounted in a 19” rack with side rails. Plug in standard SIM Relay Cards and control your switch application with the provided Soft Front Panel without any additional programming. The SIM Relay Card Carrier is also available as a kit: 1050-002. This includes a 1050-001 carrier board as well as a 1080-001 Serial Converter module.