Sitex SP38 Installation and Operation
Document PN
29010101
V2r0
- 4
7
-
Alternatively, you may choose to use the
SW’D
B+
and
GND
outputs as shown here:
Figure 22 – External Alarm, using SW'D B+ Output
Note:
when using the External Alarm configuration shown in
Figures
21 & 22
, there is a
small current which will be flowing constantly between the pins, even when the alarm is off.
This will not be a problem with many types of alarms; however, with certain types of sensitive
Piezo-electric audible alarms, the leak current can cause a constant low-level tone from the
Piezo device.
An Application Note is available which describes this potential problem in detail, with
suggested remedies. The Note also lists a number of Piezo alarms which are known to work well
with
SP38
systems.
Please ask your
Sitex
Dealer (or go to ComNav’s web site) for Application Note 2007-01.
Power Failures (J1, J2 & J3)
Some installations require separate monitoring for power failures. This can be accomplished
with the circuit in
Figure 23
, which utilizes two relays. The coil voltage of the relays should match
the supply voltage for the autopilot. The power for the Alarm Supply, which must be a separate,
dedicated supply from the autopilot supply, should match the voltage of the alarm.
Figure 23 – External Alarm, SW'D B- Output – with Power Fail Option
Installation
Summary of Contents for SP38 Autopilot
Page 2: ......
Page 14: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 13 ...
Page 15: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 14 Introduction ...
Page 16: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 15 ...
Page 26: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 25 ...
Page 35: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 34 Installation ...
Page 36: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 35 ...
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Page 108: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 107 ...
Page 109: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 108 Advanced Operations ...
Page 110: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 109 ...
Page 123: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 122 Care and Maintenance ...
Page 124: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 123 ...
Page 127: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 126 Appendices ...
Page 128: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 127 ...
Page 156: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 155 Warranty ...
Page 157: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 156 User Notes and Settings ...
Page 158: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 157 ...