Hello Everyone.
I took on what I thought would be a simple job of cleaning up some (very) shoddy wiring / poor install work. This has since blossomed into a project that, while still with-in the scope of my technical abilities, has far exceeded my scope of design knowledge.
Hopefully that's where you guys come in.
"The Project"
I am working on the temperature monitoring & alarming system on our recently constructed "Live Burn" fire training facility. It seems that the contractor who constructed the building sub'd all the electrical work over to a local contractor - which is all well and good until it came to the alarm system because they are NOT electronics contractors.
In the photos below you can see some of what I have to work with.
- Dayton 1EGJ1 Solid State Relay (3-32 VDC Input / 24-230 VAC 10A Output)
- Federal Signal LP7 Sounder / Flasher (18-30 VDC 1.1A Surge 68mA average)
- Telemecanique Switch (Model / Capacity as of yet undetermined)
- Mean Well PLC-45-24 24VDC Power Supply
What you can't see is the actual "Brains" of the system - a DAQPro 5300 portable data logger (7 Input points - 1 Output point).
Also in my "parts bin" I have an older power supply (Mfg & model escape me right now) from which I can derive both a 5VDC and a 30VDC output. Both with sufficient amperage capacity for this project.
The part that needs work
O.K. - there are several issues here - the first being that the DAQPro's output point is a 5VDC 50mA MAX Load and the alarm circuit (as left) is 24VDC. So I need to create a 5VDC trigger circuit with a relay to trigger the alarm circuit. That I understand & can do (Plan to re-use the Dayton Relay here).
However it's the actual Alarm Circuit that needs help.
Right now the "Reset" switch is a N.C. push button that simply breaks the circuit to "silence" the alarm. Seeing as how this could be in "Alarm" for quite some time - it's not practical for someone to stand there and keep their finger on the button.
What I'd like to have
Assuming that the 5VDC trigger circuit from the DAQPro is active (i.e. in an Alarm State); for the alarm circuit - I would like to have it perform as follows:
- A momentary switch that will "Silence" the audible / visual alerts and have them remain silent until the trigger circuit is no longer in an Alarm state.
- A selector (toggle) switch that will choose to silence either Audible only or both Audible & Visual alarms on the LP-7 (For the moment please assume that the Audible & Visual aspects of the FS-LP7 can be separated. The documentation I have or can find on-line is not very clear on the subject)
- A momentary switch that will "Reset" the system - meaning if the Audible / Visual alarm(s) had previously been silenced AND the trigger circuit is still in an alarm state - activating this switch will trigger the audible / visual alarms again (until silenced again).
- A flashing lamp that will be placed inside the control cabinet that should flash to indicate an alarm state even if all other Audible / Visual alerts have been "Silenced" (Assuming due to the 50mA limitation of the DAQPro that this lamp, LED, etc should be placed somewhere in the alarm circuit between the trigger point & the reset switch).
If some one could provide a basic circuit schematic then I should be able to take it from there. However any recommendations for specific hardware (relays, LED modules, etc) will also be graciously accepted.
Thank you all in advance for your assistance. It is very much appreciated.
Steve
Photos:
Photo 1 (Overview)
Photo 2 (Left Box)
Photo 3 (Right Box)
Photo 4 (Alarm Schematic)
I took on what I thought would be a simple job of cleaning up some (very) shoddy wiring / poor install work. This has since blossomed into a project that, while still with-in the scope of my technical abilities, has far exceeded my scope of design knowledge.
Hopefully that's where you guys come in.
"The Project"
I am working on the temperature monitoring & alarming system on our recently constructed "Live Burn" fire training facility. It seems that the contractor who constructed the building sub'd all the electrical work over to a local contractor - which is all well and good until it came to the alarm system because they are NOT electronics contractors.
In the photos below you can see some of what I have to work with.
- Dayton 1EGJ1 Solid State Relay (3-32 VDC Input / 24-230 VAC 10A Output)
- Federal Signal LP7 Sounder / Flasher (18-30 VDC 1.1A Surge 68mA average)
- Telemecanique Switch (Model / Capacity as of yet undetermined)
- Mean Well PLC-45-24 24VDC Power Supply
What you can't see is the actual "Brains" of the system - a DAQPro 5300 portable data logger (7 Input points - 1 Output point).
Also in my "parts bin" I have an older power supply (Mfg & model escape me right now) from which I can derive both a 5VDC and a 30VDC output. Both with sufficient amperage capacity for this project.
The part that needs work
O.K. - there are several issues here - the first being that the DAQPro's output point is a 5VDC 50mA MAX Load and the alarm circuit (as left) is 24VDC. So I need to create a 5VDC trigger circuit with a relay to trigger the alarm circuit. That I understand & can do (Plan to re-use the Dayton Relay here).
However it's the actual Alarm Circuit that needs help.
Right now the "Reset" switch is a N.C. push button that simply breaks the circuit to "silence" the alarm. Seeing as how this could be in "Alarm" for quite some time - it's not practical for someone to stand there and keep their finger on the button.
What I'd like to have
Assuming that the 5VDC trigger circuit from the DAQPro is active (i.e. in an Alarm State); for the alarm circuit - I would like to have it perform as follows:
- A momentary switch that will "Silence" the audible / visual alerts and have them remain silent until the trigger circuit is no longer in an Alarm state.
- A selector (toggle) switch that will choose to silence either Audible only or both Audible & Visual alarms on the LP-7 (For the moment please assume that the Audible & Visual aspects of the FS-LP7 can be separated. The documentation I have or can find on-line is not very clear on the subject)
- A momentary switch that will "Reset" the system - meaning if the Audible / Visual alarm(s) had previously been silenced AND the trigger circuit is still in an alarm state - activating this switch will trigger the audible / visual alarms again (until silenced again).
- A flashing lamp that will be placed inside the control cabinet that should flash to indicate an alarm state even if all other Audible / Visual alerts have been "Silenced" (Assuming due to the 50mA limitation of the DAQPro that this lamp, LED, etc should be placed somewhere in the alarm circuit between the trigger point & the reset switch).
If some one could provide a basic circuit schematic then I should be able to take it from there. However any recommendations for specific hardware (relays, LED modules, etc) will also be graciously accepted.
Thank you all in advance for your assistance. It is very much appreciated.
Steve
Photos:
Photo 1 (Overview)
Photo 2 (Left Box)
Photo 3 (Right Box)
Photo 4 (Alarm Schematic)