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FUNCTIONAL DESCRIPTION
A functional block diagram is provided in Figure 2.1. The High Density Relay Module is powered by a +5V input via
Compact PCI connector J1. The interface to the user test equipment is via the front panel mounted 200-pin LFH type
connector, J2. The module comprises a PCB populated with electro-mechanical relays. The relays are energised via
control signals from relay drivers U8 to U14, which are addressed by PCI bridge U1, via the control logic, to output
the required signal. Module configuration is determined by links and data stored in EEPROM U7. PCI Bridge U1 is
configured by EEPROM U2.
PXI HIGH DENSITY REED RELAY MODULE 40-145/146/148
Relays RL1-25, RL1-32,
RL1-48, RL1-50, RL1-64,
RL1-75 or RL1-100
One of Eleven Different
SPST, DPST or SPDT
Relay Configurations
Figure 2.1 - High Density Relay Modules 40-145/146/148: Functional Block Diagram
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SECTION 2 - TECHNICAL DESCRIPTION
HIGH DENSITY RELAY MODULES 40-145/146/148
SECTION 2 - TECHNICAL DESCRIPTION
PCI Bridge
Configuration
U2
Relay
Drivers
U8-14
Control Logic
U3-6
& Module
Configuration
U7
Terminating
Resistors
R3-14
+5V
GND
Page 2.1
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