Functional Description - Pickering 40-617A User Manual

pickering

FUNCTIONAL DESCRIPTION

A functional block diagram is provided in Figure 2.1. The Multiplexer Module is powered by +5V inputs via Compact
PCI connector J1. The interface to the user test equipment is via the front panel mounted 96-pin micro-D connector,
J2. The module comprises a PCB populated with single pole relays configured as a multiplexer. The relays are
energised via control signals from relay drivers U8 to U14. Each relay driver is addressed by PCI bridge U1, via the
control logic comprising U3 to U6, to output the required signal. Module configuration is determined by data stored
in EEPROM U7. PCI Bridge U1 is configured by EEPROM U2.
MULTIPLEXER
RELAY CONTACTS
18 OFF
SINGLE POLE MUX
ISOLATION
SWITCH
COMMON
Figure 2.1 - Multiplexer Module 40-617A: Block Diagram
18 BANK, 3 CHANNEL, 1-POLE MULTIPLEXER MODULE 40-617A
SECTION 2 - TECHNICAL DESCRIPTION
RELAY COILS
RELAY
DRIVERS
U8 TO U14
MODULE
CONFIGURATION
U7
1
2
3
SECTION 2 - TECHNICAL DESCRIPTION
CONTROL
PCI
LOGIC
BRIDGE
U3, U4,
U1
U5, U6
PCI BRIDGE
CONFIGURATION
U2
TERMINATING
RESISTORS
R3 TO R14
+5V
0V
Page 2.1