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1260-X121 User Manual
Installation Instructions 2-2
Racal Instruments
©
2005
Module
Configuration
The 1260-X121 is a 20-channel single-wire switch module
consisting of twenty SPST relay switches ten SPST configuration
relays. This architecture permits the 1260-X121 module to be
organized via software as twenty SPST or ten 1X2 switches.
For a block diagram of the 1260-X121, see
Figure 2-1
.
FRONT
PANEL
2X Burndy
MS20PM-58
CONTROL
CIRCUITS
AND RELAY
DRIVERS
CH00
CH01
CH02
CH19
VRR
Figure 2-1, 1260-X121 Block Diagram