MODEL 1582-725 RF Switch
1.0 General
1.1 Equipment Description
- The 1582-725 RF Switch has two independent switches (A and B) in a single 1
3/4” chassis. Each switch provides Auto, Manual, or Remote relay switching between CH1 and CH2. Alarm
conditions on CH1 and CH2 are detected if a contact closure (to ground or an open, selectable) occurs.
Switching logic can be selected as follows:
1) CH1 Prime Mode
- Switches from CH1 to CH2 only if CH1 alarms and CH2 is good.
Switches back to CH1 when it is no longer in alarm or when both CH1 and CH2 are in alarm.
2) Latch to CH2 Mode
- Switches from CH1 to CH2 if CH1 alarms and CH2 is good.
Latches to CH2. Push Reset or ground Remote Reset pin to return to CH1 if it has no alarm
or both CH1 and CH2 are in alarm.
3) Minimum Auto switching, Initial Channel Select (ICS) Mode
- Switch stays on channel last
selected by Manual or Remote selection after return to Auto if both channel alarms are clear or both
channels are in alarm. Auto switching occurs only if current channel alarms and the other channel
is clear.
Factory set mode is generally
(1) CH1 Prime Mode.
When power is first applied and there are no alarms, CH1 is selected. On power loss CH2 is the selected
channel. The Manual Select switch and contact closures to Remote Select pins (when in Auto), select CH1 or
CH2 independent of alarms. LEDs indicate alarm and switch conditions for CH1 and CH2, REMOTE or
MANUAL operation, and power on. RF connectors are BNC, female. Contact closure inputs and outputs are
via barrier strip. Dual power supplies provide redundant power to the 1582-725. The chassis is a 1 3/4” rack
mount.
SWITCH A
MODEL 1582
POWER
1 2
AUTO
CROSS TECHNOLOGIES, INC.
ON-
LINE
MANUAL
SELECT
REM
ON-
LINE
ALM
CH 1
CH 2
ALM
MAN
RESET
SWITCH B
AUTO
ON-
LINE
MANUAL
SELECT
REM
ON-
LINE
ALM
CH 1
CH 2
ALM
MAN
RESET
FIGURE 1.1 Model 1582-725 RF Front Panel
1582-73 BLOCK DIA
CONTROL
LOGIC SWA
AUTO
CH 1
CH 2
SWITCH
RESET
1 2
ALARM
1 2
REMOTE
REMOTE
SW.
RESET
SWITCH A
SWITCHED
RF
SWITCH A
RF 1
SWITCH A
RF 2
CONTROL
LOGIC SWB
AUTO
CH 1
CH 2
SWITCH
RESET
1 2
ALARM
1 2
REMOTE
REMOTE SW.
RESET
FINAL OUTPUT
SWITCH B
SWITCHED RF
SWITCH B
RF 1
SWITCH B
RF 2
CH1 &CH2
ALARM
1582-725 Block Diagram
FIGURE 1.2 Model 1582-725 RF Switch Block Diagram (
Each Switch
)
1582-725 Manual, Rev. B
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4/10/14
