EDR to 20240 Connection - Revision history

Thomas Peterson: /* Background */

2023-12-15T22:47:52Z

Background

← Older revision		Revision as of 22:47, 15 December 2023
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	== Background ==		== Background ==

	The 20240 (EMD) is a module that historically is used for ZZZZ compliance monitoring. Since it has a RS-485 slave port, it can also be used as a generic sensor to modbus translator.		The 20240 (EMD) is a module that historically has been used for ZZZZ compliance monitoring. Since it has a RS-485 slave port, it can also be used as a generic sensor to modbus translator.

	In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely.		In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely.

Thomas Peterson: /* Wiring */

2023-12-15T19:58:17Z

Wiring

← Older revision		Revision as of 19:58, 15 December 2023
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	# For a thermistor wire between 36-37 or 38-37		# For a thermistor wire between 36-37 or 38-37
	# Wire the modbus A,B wire back to the EDR master port. In most cases the wires will then daisy-chain to the annunciator as shown in the diagram below. Since in this case wires are coming in and out of the 7,8,9 plug the termination switch will be off (in) as shown. In the less common case where the 20240 is at the end of the chain the termination will be on (out).		# Wire the modbus A,B wire back to the EDR master port. In most cases the wires will then daisy-chain to the annunciator as shown in the diagram below. Since in this case wires are coming in and out of the 7,8,9 plug the termination switch will be off (in) as shown. In the less common case where the 20240 is at the end of the chain the termination will be on (out).

			[[File:Edr emd.png]]

	=== Input Numbering ===		=== Input Numbering ===

Thomas Peterson: /* Scaling */

2023-12-15T18:31:41Z

Scaling

← Older revision		Revision as of 18:31, 15 December 2023
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	Most registers have a special scaling as shown on the [[20240 EMD Modbus Table]]. For thermocouples the offset and scale can be put into the EDR offset and scale to read the temperature properly. For analog inputs the offset and scale will map to a mA reading, so additional math will be required to actually translate to a proper pressure.		Most registers have a special scaling as shown on the [[20240 EMD Modbus Table]]. For thermocouples the offset and scale can be put into the EDR offset and scale to read the temperature properly. For analog inputs the offset and scale will map to a mA reading, so additional math will be required to actually translate to a proper pressure.

			For sensors with a low range of 0, the offset will be -[sensor range / 4] , and the scale will be [sensor range / 1600]

	Example : a 4-20mA input is used for a 0-300 psi sensor.		Example : a 4-20mA input is used for a 0-300 psi sensor.
			*Offset = -[300/4] = -75
			*Scale = [300/1600] = 0.1875

			Entering the offset and scale in the EMD row for that sensor will change the value to the proper pressure reading

Thomas Peterson at 18:21, 15 December 2023

2023-12-15T18:21:49Z

← Older revision		Revision as of 18:21, 15 December 2023
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	[[File:Emd therm resistor.png\|300px]]		[[File:Emd therm resistor.png\|300px]]

			== Configuring EDR ==

			Once everything is wired up and powered, the EDR Modbus Master table can be altered to pull data from the EMD. See [[EDR_Wi-Fi_Console]] for information about connecting to the EDR Wi-Fi.

			For each input in use, see [[20240 EMD Modbus Table]] for the register number. The default ID for the EMD is "8", but this can be changed (see next section).

			Example: If suction pressure sensor is wired to 20240 analog input 1 at pin 20, then the Suction pressure register on the EDR modbus table can be set to 30104 (and ID to 8 by default).

			===Scaling===

			Most registers have a special scaling as shown on the [[20240 EMD Modbus Table]]. For thermocouples the offset and scale can be put into the EDR offset and scale to read the temperature properly. For analog inputs the offset and scale will map to a mA reading, so additional math will be required to actually translate to a proper pressure.

			Example : a 4-20mA input is used for a 0-300 psi sensor.

Thomas Peterson: /* Input Numbering */

2023-12-15T18:06:32Z

Input Numbering

← Older revision		Revision as of 18:06, 15 December 2023
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	The pins map to the input numbers with the following table.		The pins map to the input numbers with the following table.

	{\| class="wikitable~~" style="margin:auto~~"		{\| class="wikitable"
	\|+		\|+
	\|-		\|-

Thomas Peterson: /* Input Numbering */

2023-12-15T18:04:56Z

Input Numbering

← Older revision		Revision as of 18:04, 15 December 2023
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	=== Input Numbering ===		=== Input Numbering ===

			The pins map to the input numbers with the following table.

	{\| class="wikitable" style="margin:auto"		{\| class="wikitable" style="margin:auto"
	\|+ ~~Caption text~~		\|+
	\|-		\|-
	! Input !! Pin		! Input !! Pin

Thomas Peterson: /* Wiring */

2023-12-15T18:04:12Z

Wiring

← Older revision		Revision as of 18:04, 15 December 2023
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	== Wiring ==		== Wiring ==

			# Wire fused power into pins 4,5 of the 20240.
			# For a typical loop powered pressure sensor, wire the power wire into a +12v pin (21, 17, 44) and the signal wire into the input (pin 20, 23, 45, 42, or 19).
			# For thermocouples wire into pins 24-35 depending on input number
			# For a digital input wire into 39 or 41 with the other side of the switch to ground (40)
			# For a thermistor wire between 36-37 or 38-37
			# Wire the modbus A,B wire back to the EDR master port. In most cases the wires will then daisy-chain to the annunciator as shown in the diagram below. Since in this case wires are coming in and out of the 7,8,9 plug the termination switch will be off (in) as shown. In the less common case where the 20240 is at the end of the chain the termination will be on (out).

			=== Input Numbering ===

			{\| class="wikitable" style="margin:auto"
			\|+ Caption text
			\|-
			! Input !! Pin
			\|-
			\| Thermocouple 1 \|\| 24, 25
			\|-
			\| Thermocouple 2 \|\| 26, 27
			\|-
			\| Thermocouple 3 \|\| 28, 29
			\|-
			\| Thermocouple 4 \|\| 30, 31
			\|-
			\| Thermocouple 5 \|\| 32, 33
			\|-
			\| Thermocouple 6 \|\| 34, 35
			\|-
			\| Thermistor 1 \|\| 36*
			\|-
			\| Thermistor 2 \|\| 38*
			\|-
			\| Analog 1 \|\| 20
			\|-
			\| Analog 2 \|\| 23
			\|-
			\| Analog 3 \|\| 45
			\|-
			\| Analog 4 \|\| 42
			\|-
			\| Analog 5 \|\| 19
			\|-
			\| Analog 6 \|\| 36*
			\|-
			\| Analog 7 \|\| 38*
			\|-
			\| Digital in 1 \|\| 39
			\|-
			\| Digital in 2 \|\| 41
			\|}

			*Pins 36 and 38 can be used as thermistor OR analog input (if adding a resistor), see below

			=== Thermistor input note ===

			Pins 36 and 38 can each be used as a thermistor or an analog input (but not both). Using as an analog input requires adding a 249 ohm resistor to ground. This would only be done if needing more than 5 analog inputs.

			[[File:Emd therm resistor.png\|300px]]

Thomas Peterson at 17:51, 15 December 2023

2023-12-15T17:51:52Z

← Older revision		Revision as of 17:51, 15 December 2023
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	*Digital Inputs: 2		*Digital Inputs: 2

	Note that the thermistor inputs can be used for thermistors or analog		Note that the thermistor inputs can be used for thermistors or analog.

	== Wiring ==		== Wiring ==

Thomas Peterson at 17:51, 15 December 2023

2023-12-15T17:51:39Z

← Older revision		Revision as of 17:51, 15 December 2023
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	In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely.		In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely.

			The 20240 can be connected to the following number of sensors:

			*Analog (e.g. pressure sensor): 5 - 7
			*Thermocouple (Type K): 6
			*Thermistor: 0 - 2
			*Digital Inputs: 2

			Note that the thermistor inputs can be used for thermistors or analog

			== Wiring ==

Thomas Peterson: Created page with "== Background == The 20240 (EMD) is a module that historically is used for ZZZZ compliance monitoring. Since it has a RS-485 slave port, it can also be used as a generic sensor to modbus translator. In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely."

2023-12-15T17:39:22Z

Created page with "== Background == The 20240 (EMD) is a module that historically is used for ZZZZ compliance monitoring. Since it has a RS-485 slave port, it can also be used as a generic sensor to modbus translator. In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely."

New page

== Background ==

The 20240 (EMD) is a module that historically is used for ZZZZ compliance monitoring. Since it has a RS-485 slave port, it can also be used as a generic sensor to modbus translator.

In a typical scenario, a 20240 and a few sensors could be added to an old annunciator panel (e.g. TTD or DD-40) to allow the EDR to send the sensor values remotely.