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Setting
Simultaneous/
Stepped Actuation
(36-Channel Mode)
Setting Pulsed/
Continuous Output
(36-Channel Mode)
Changing
Timer Delay
When 36-channel mode is set (CNFG 0 connected to GROUND), you can
use CNFG 1 to set whether to actuate a channel pair at a time with a 30 msec
delay between channel pairs (stepped actuation) or to simultaneously actuate
all channel pairs in the channel list (simultaneous actuation). When a *RST
occurs, up to six relay pairs may be opened at a time.
Use the CNFG 1 pin (pin 38 on P200) to set simultaneous or stepped
actuation mode (for 36-channel mode ONLY).
•
Simultaneous Actuation: Leave CNFG 1 open
•
Stepped actuation: connect CNFG 1 to GROUND
Some microwave relays do not have DC interrupt capability, but the relays
are latching. To reduce the power drawn by these relays you may want to
use the pulsed mode of operation. With continuous output, currents are
continuously applied.
With pulsed output, when a channel is actuated the SET or RESET current
is applied until the 30 msec timer indicates the channel has finished moving.
The current is then removed, and another 30 msec wait occurs. When a
*RST occurs, up to six channel pairs at a time may be pulsed. If multiple
channel pairs are opened or closed, the next channel pair will wait until the
previous channel has finished pulsing.
Use the CNFG 2 pin (pin 37 on P200) to set pulsed or continuous output
(for 36-channel mode ONLY).
•
Continuous output: Leave CNFG 2 Open
•
Pulsed output: Connect CNFG 2 to GROUND
A 30 msec time delay is supplied for stepped, continuous, or pulsed
operation. If your application requires a longer time delay, you could
change the components on the board. However, doing this may cause
Self Test to fail.
You can use one of two methods to eliminate the Self Test error:
•
If the required time delay is 50 msec or less, connecting CNFG 3 to
GROUND causes the Self Test to check the timer at 50 msec rather
than at 30 msec. (This is the maximum internal time check available
with the Command Module.)
•
If the required time delay is greater than 50 msec, connecting CNFG 4
to GROUND will skip the Self Test time check completely.
Configuring the Relay Driver Module
27
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