SECTION 1 - INTRODUCTION
Page 1.1
SIM REED RELAY CARDS SIMRC 1000
pickering
SECTION 1 - INTRODUCTION
Pickering Interfaces Series 1000 SIM Reed Relay Cards offer a choice of switching congurations using low cost industry standard
SIM connectors. They 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-eld maintenance. The range is as follows:
• 8 x SPST Uncommitted Reed Relays
• 16 x SPST Uncommitted Reed Relays
• 16 x SPDT Uncommitted Reed Relays
• 16 x SPST Uncommitted Screened Reed Relays
• 8 Channel, 1-Pole Reed Relay Multiplexer
• 8 Channel, 2-Pole Reed Relay Multiplexer
• 16 Channel, 1-Pole Reed Relay Multiplexer
• 16 Channel, 2-Pole Reed Relay Multiplexer
• 16 Channel, 1-Pole Screened Reed Relay Multiplexer
• 8 x 2, 1-Pole, Reed Relay Matrix
• 8 x 2, 1-Pole, Screened Reed Relay Matrix
• 8 x 2, 2-Pole, Reed Relay Matrix
• 8 x 4, 1-Pole, Reed Relay Matrix
• 8 x 4, 1-Pole, Screened Reed Relay Matrix
• 8 x 4, 2-Pole, Reed Relay Matrix
Pickering Interfaces will also produce customised versions for specic applications.
Automatic Self-Test
A limited logic only Self-Test is invoked at power on and may also be operated under software command. Self-Test pass is indicated
by a PCB mounted LED with a full pass/fail description available via either the I2C or RS-232 interfaces.
Connections
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
The SIM Relay Cards have a simple ASCII control language (the same commands work with either I2C or RS-232). Pickering
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 (Microchip PIC16C74). The operation of this card is entirely under
the control of this microcontroller which receives commands via its I2C and RS-232 interfaces. The Card has a standard I2C and
RS-232 interface with read/write capability and is constructed using a 4 layer PCB with extensive RFI shielding, most components
being surface mount with the exception of relays and jumpers to simplify maintenance.
High Quality Pickering Reed
Relays (1 or 2 Pole or Co-ax)
Gold SIM Contacts
I2C Address
Selection
Status
LED
I2C Port
RS232/
8-Bit RISC Microprocessor 4-Layer PCB
Power
LED
I2C Bus on SIMM
Connector
Figure 1.1 - Features of the SIMRC 1030 Matrix Module
