# ISISPACE Modular Deployment Sequencer
*launcher . launch services*

ISISPACE's modular deployment sequencer controls deployer activation timing, collects separation confirmations, and relays deployment status to a launch vehicle.

## Specifications
- **manufacturer**: isispace
- **deployment context**: orbital
- **entity type**: launch_service
- **last verified date**: 2026-05-28
- **verified by**: operator
- **claim status**: unclaimed
- **subtype**: deployer
- **provider**: isispace
- **attributes**: {"kind":"launcher","product_status":null,"manufacturer":"isispace","description":"ISISPACE's modular deployment sequencer controls deployer activation timing, collects separation confirmations, and relays deployment status to a launch vehicle.","sensor":null,"bus":null,"ground_segment":null,"launcher":null,"analysis_service":null,"deployment_context":"orbital"}

## Editorial
The ISISPACE Modular Deployment Sequencer (MDS, also referenced as IMDS) sequences satellite deployer activation between a launch vehicle and the deployer systems it controls.[^isispace-mds-product-page][^isispace-product-catalog] On receipt of a valid launch-vehicle command, the MDS executes preprogrammed deployment sequences, signals deployer systems and doors, collects separation confirmations, and reports deployment status back to the launch vehicle.[^isispace-mds-product-page]

The MDS is modular in mass and scale: a four-deployer configuration with external power masses approximately 1 kg; an eight-deployer configuration with internal power masses approximately 2 kg; a 32-deployer configuration with a high-current battery option masses approximately 3.8 kg.[^isispace-mds-product-page] Base area is 250 x 100 mm; height depends on module count.[^isispace-mds-product-page] Pulse power supply operates at 28 V (+/- 4 V) with 0.1 to 2 s pulse duration.[^isispace-mds-product-page] Digital interfaces provided include RS485, RS422, USART, CAN bus, and Ethernet; analog breakwire interfaces are also supported.[^isispace-mds-product-page]

The ISISPACE product page states over 430 payload deployments across more than 15 launches since 2014, with qualification for Dnepr, PSLV, Falcon 9, Vega, and additional launch vehicles.[^isispace-mds-product-page] Independent agency or peer-reviewed technical sources for the public specification and deployment count were not identified; the ISISPACE product page is the primary source as of 2026-05-28.[^isispace-mds-product-page]

## Sources
- [isispace-mds-product-page] | Modular Deployment Sequencer, ISISPACE product page | https://www.isispace.nl/product/isispace-modular-deployment-sequencer/ | tier=operator-datasheet | accessed=2026-05-28
- [isispace-product-catalog] | Product Categories, ISISPACE | https://www.isispace.nl/product/ | tier=operator-marketing | accessed=2026-05-28
- [isispace-launch-equipment] | Launch Equipment and Services, ISISPACE | https://isispace.nl/launch-equipment-services/ | tier=operator-marketing | accessed=2026-05-28

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Source: https://eo-atlas.org/launch_services/isispace-modular-deployment-sequencer
Maintainer: SpectraWorks B.V. (CC-BY 4.0)