Aeroflex / Tektronix / CDS 53A-331 Reed Relay Scanner Card

The Aeroflex / Tektronix / CDS 53A-331 Reed Relay Scanner Card is a specialized component designed for automated test systems and data acquisition applications, offering reliable switching of analog and digital signals with emphasis on low thermal offset and high isolation. This card is engineered for integration into CDS 53/63 Series Systems, providing a robust solution for complex switching matrices within demanding laboratory and enterprise environments.

### Technical Specifications

**General Configuration:**
* Type: Reed Relay Scanner Card
* Manufacturer: Aeroflex / Tektronix / CDS
* Model: 53A-331
* Series Compatibility: CDS 53/63 Series Systems

**Channel Configuration:**
* Number of Channels: 10
* Channel Type: Four-wire analog signal acquisition
* Switching Configuration: Ten individual dry reed relays, each 4-pole, Form A
* Common Output Bus: 4 lines

**Switching and Contact Specifications:**
* Switching Rate: Up to 150 channels per second (random channel selection)
* Maximum Resistive Load: 10 Watts
* Maximum Switching Voltage: 200V DC
* Maximum Switching Current: 0.5 Ampere
* Initial Contact Resistance: Less than 100 milliohms
* Contact Resistance at End of Reed Life: Less than 1 Ohm
* Reed Life Expectancy: At least 10^7 operations per channel at rated load (10 Watts)
* Duty Cycle: Continuous

**Signal Path Performance:**
* Differential Thermal Offset: Less than 15 microvolts (valid at backplane analog output connector)
* Single-line Thermal Offset: Less than 50 microvolts (valid at backplane analog output connector)
* Initial Signal Path Resistance: Greater than 500 milliohms
* Signal Path Resistance at End of Reed Life: Less than 1.4 Ohms

**Isolation and Insulation:**
* Insulation Resistance (between all channels and chassis ground): Greater than 10 gigohms
* Insulation Resistance (Closed Channel, common bus to ground): 1 megohm (with 1-megohm resistors installed on front connector)
* Insulation Resistance (Open Channel, any input to ground): Greater than 10 gigohms

**Control and Operation:**
* Channel Selection: Random channel selection via ASCII character commands from a system controller (calculator or computer)
* Built-In-Test Equipment (BITE): Ten LEDs provide status indication for each corresponding channel when closed.

**System Integration and Scalability:**
* Card Cage Compatibility: Designed to plug into a card cage within the CDS 53/63 Series System.
* System Capacity: Multiple 53A-331 cards can be installed in a single card cage to expand scanning capabilities.
* Interoperability: Can be installed within the same card cage as other compatible scanner cards, such as the 53A-332 (twenty 2-wire channels) and 53A-336 (sixteen 2-wire high voltage channels).
* System Expansion: Multiple card cages can be chained for further system expansion.

**Recommended Cables:**
* 53A-721
* 53A-780

**Optional Features:**
* OPT 20: Backplane output isolation switch

**Power Requirements:**
* Voltage: 4.75V to 5.25V DC
* Current: 0.85A quiescent, 0.90A peak
* Power Source: Provided by a 53A-060 Power Supply located in the 53A-002 or 63A-012 Card Cage.

### Why Choose Aumictech for Aeroflex / Tektronix / CDS 53A-331 Reed Relay Scanner Card?
At Aumictech, we specialize in supplying high-end automated test equipment. Whether you need to reliably switch analog and digital signals, ensure low thermal offset for precise measurements, or achieve high isolation in your test setups, our team ensures the Aeroflex / Tektronix / CDS 53A-331 Reed Relay Scanner Card delivers maximum performance for your critical applications.