Pickering 40-170, Руководство пользователя

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Page 2.1
HIGH POWER RELAY MODULE 40-170
pickering
SECTION 2 - TECHNICAL DESCRIPTION
SECTION 2 - TECHNICAL DESCRIPTION
Figure 2.1 - High Power Relay Module 40-170: Functional Block Diagram
Relays RL1-2
2xSPST or 2xDPST
Front Panel Male 8-pin Power D-type Connector
Control Logic
U5-6
& Module
Configuration
U7
PCI Bridge
Configuration
U2
Terminating
Resistors
R4-15
PCI Bridge U1
Compact PCI Bus Connector J1
PXI POWER RELAY MODULE 40-170
GND
Sink
Drivers
U9-10
+5V
+12V
Relay
Drivers
U12-13
Protection
Circuit
Q1-2
FS1
FUNCTIONAL DESCRIPTION
A functional block diagram is provided in Figure 2.1. The Power Relay Module is powered by +12V and +5V inputs
via Compact PCI connector J1. The interface to the user test equipment is via the front panel mounted 8-pin power
D-Type connector. The module comprises a PCB which provides mounting for control logic and two high power
relays RL1 and RL2. Relay RL1 is energised via control signals from relay driver U13. Relay RL2 is energised via
control signals from relay driver U12. Relay drivers U12 and U13 are interfaced to the low power digital control logic
via sink drivers U9 and U10 respectively. The relay drivers are addressed by PCI bridge U1 to output the required
signal. PCI Bridge U1 is configured by EEPROM U2. At start up the application of the +12V supply to the relays is
delayed by a protection circuit comprising transistors Q1 and Q2.