Page 2.1
HIGH DENSITY RELAY MODULES 40-145/146/148
pickering
SECTION 2 - TECHNICAL DESCRIPTION
SECTION 2 - TECHNICAL DESCRIPTION
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.
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
Front Panel Female 200-pin LFH Connector J2
Control Logic
U3-6
& Module
Configuration
U7
PCI Bridge
Configuration
U2
Terminating
Resistors
R3-14
PCI Bridge U1
GND
Compact PCI Bus Connector J1
PXI HIGH DENSITY REED RELAY MODULE 40-145/146/148
+5V
Relay
Drivers
U8-14
Figure 2.1 - High Density Relay Modules 40-145/146/148: Functional Block Diagram
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