User`s manual

VXI Technology, Inc.
38 EX7000-OEM Web Page Operation
RDBs can either be commanded one board at a time or several RDBs may be commanded
simultaneously. The RDB has 72 relay control drive lines capable of sinking 200 mA and twelve
high-current reset lines capable of sinking 800 mA. They are divided into three banks, each can be
powered separately. Each bank consists of four 20-pin connectors. Each connectors consists of:
• six high-current drive lines
• six indicator/status bits
• one reset line
• four relay ID bits
• one relay power input
• one 5 V input
• one ground
NOTE All devices connected to a particular bank (i.e. group of four connectors) must be of the same
type: continuous or latching. Mixing of different type may result in erratic behavior and damage to
overall system.
RELAY ACCESS & CONTROL
F
IGURE 5-2: RELAY DRIVER BLOCK DIAGRAM
The following connections should be made:
1) The Relay Power line (PWR_BANKx) to the positive sides of all relay coils.
2) The Relay Drive line (RELAY_DRIVEx) to the negative sides of the coils.
When asserted, the relay drive lines will sink the necessary current through the coils, effectively
switching the Relay. The user can program the relay settling time for each RDB.
The relay control can be operated in 2 modes: Pulse and Continuous