Ren-T Assembly Instructions - Revision history

Ravinglunatic: /* Related Links */

2011-01-29T03:14:01Z

Ravinglunatic: /* '''Related Links''' */

2009-10-27T00:00:14Z

'''Related Links'''

← Older revision		Revision as of 00:00, 27 October 2009
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	[[Ren-T PCB Assembly Instructions \| Ren-T PCB Assembly Instructions]]		[[Ren-T PCB Assembly Instructions \| Ren-T PCB Assembly Instructions]]


			[[Category:Ren-T]]
			[[Category:Renard]]

Ravinglunatic at 14:38, 26 February 2008

2008-02-26T14:38:58Z

← Older revision		Revision as of 14:38, 26 February 2008
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	[[Image:Ren-T (dwg).gif]]		[[Image:Ren-T (dwg).gif]]
	<br>		<br>

			===Board Versions===
			*V2.4 - Has provisions for mounting a dual secondary transformer. The dual secondary type transformer was later found to be undesirable for generating the Zero Crossing signal.

			*V2.5 - Removed D5 & D6 and pads for the dual secondary transformer


	==Board Functions==		==Board Functions==

Ravinglunatic at 05:08, 26 February 2008

2008-02-26T05:08:14Z

Show changes

Ravinglunatic at 02:54, 22 February 2008

2008-02-22T02:54:02Z

← Older revision		Revision as of 02:54, 22 February 2008
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	2007/09/03 Removed references to non-center-tapped transformer, as they do not always reliably provide a good zero-crossing signal.		2007/09/03 Removed references to non-center-tapped transformer, as they do not always reliably provide a good zero-crossing signal.

			=='''Related Links'''==

			[[Ren-T PCB Assembly Instructions \| Ren-T PCB Assembly Instructions]]

Jeffmill: /* '''BOM''' */

2007-09-12T01:44:46Z

'''BOM'''

← Older revision		Revision as of 01:44, 12 September 2007
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	*'''U2''' ~ 1 - 837-ISL81487EIP - RS-485/422 Interface ICs 5V TXRX ESD		*'''U2''' ~ 1 - 837-ISL81487EIP - RS-485/422 Interface ICs 5V TXRX ESD

	*'''U3''' ~ 1 - 595-SN75C189AN - RS-232 Interface ICs Quad Low Pwr		*'''U1''' ~ 1 - 595-SN75C189AN - RS-232 Interface ICs Quad Low Pwr

	*'''C1''' ~ 1 - 140-XRL16V10-RC - Radial Electrolytic Capacitors 16V 10uF 20%		*'''C1''' ~ 1 - 140-XRL16V10-RC - Radial Electrolytic Capacitors 16V 10uF 20%
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	*The transformers listed are not the only ones that can be used. They are what was used during the design and testing and are direct fits for the pads of the PCB.		*The transformers listed are not the only ones that can be used. They are what was used during the design and testing and are direct fits for the pads of the PCB.


	=='''Schematic'''==		=='''Schematic'''==

Phil Short at 23:53, 3 September 2007

2007-09-03T23:53:30Z

← Older revision		Revision as of 23:53, 3 September 2007
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	The input voltage of the transformer must be the same as the AC line voltage available in your locale. You cannot use a 120VAC transformer in a location with 240 VAC power, nor can you use a 240VAC transformer if your local power is 120VAC. There are some transformers with dual primaries that can be wired up to accept either 120 or 240 VAC, but discussion of how to use these is beyond the scope of this page.		The input voltage of the transformer must be the same as the AC line voltage available in your locale. You cannot use a 120VAC transformer in a location with 240 VAC power, nor can you use a 240VAC transformer if your local power is 120VAC. There are some transformers with dual primaries that can be wired up to accept either 120 or 240 VAC, but discussion of how to use these is beyond the scope of this page.

	~~===''Regular~~ (~~No Center~~-~~Tap~~) ~~Transformer''===~~		The preferred design uses a center-tapped transformer. This is a transformer which has a single output winding with three connections (one at either end of the winding, and one in the exact middle), in which the middle connection (the center-tap) is to be used. One disadvantage of this circuit is that the iron and copper in the transformer is only used with 50% effectiveness because at any point in time only half of the transformer is supplying current.

	This is a transformer which has effectively one single output winding with two connections (at each end of the output winding). This is functionally the same as a center-tapped transformer (see the next section) in which the center-tap wire is disconnected (by cutting it off or placing a wire-nut or electrical tape over it).		The transformer output voltage should be either 12.6VAC or 16 VAC, and the output wires from the transformer should be connected as shown here.

	~~If you use this type of transformer, the output voltage of this type of transformer should be 6.3VAC or 8VAC, and the output wires of the transformer should be connected to here and here on the PCB.~~

	~~[[IMAGE:Xformer_conn1.gif]]~~


	~~The effective schematic ends up looking like this after taking into account the diodes which are actually installed:~~

	~~[[IMAGE:xformer_regular.GIF]]~~

	The waveform across the output of the transformer (pins 5,8) is a sinewave with amplitude 1.41*Vtrans when fully loaded (where Vtrans would be the 6.3V or 8V rated value of the transformer). The amplitude will be somewhat higher if there is no load on the transformer or just a minimal load.

	~~[[IMAGE:sinewave_nolabel.gif]]~~

	The output of the rectifier circuit (VOUT+ - VOUT-) is a rectified sinewave, as shown below. The amplitude of the output waveform is (1.41*Vtrans - 2Vf), where Vf is the forward voltage of the diodes (about 0.7V for regular diodes, 0.4V for Schottky diodes).

	~~[[IMAGE:sinewave_rect.gif]]~~

	~~===''Center-Tapped Transformer''===~~

	This is a transformer which has a single output winding with three connections (one at either end of the winding, and one in the exact middle), in which the middle connection (the center-tap) is to be used. One disadvantage of this circuit is that the iron and copper in the transformer is only used with 50% effectiveness (compared with the four-diode, non center-tapped circuit) because at any point in time only half of the transformer is supplying current.

	~~If you use this type of~~ transformer ~~(and use the center-tap), the~~ output voltage should be either 12.6VAC or 16 VAC, and the output wires from the transformer should be connected as shown here.

	[[IMAGE:Xformer_conn2.gif]]		[[IMAGE:Xformer_conn2.gif]]

	The effective schematic (taking into account the parts which are ~~not~~ installed) is here:		The effective schematic (taking into account the parts which are actually installed) is here:

	[[IMAGE:Xformer_ct.gif]]		[[IMAGE:Xformer_ct.gif]]

	The waveform across the output of the transformer (pins 5,8) is a ~~sinewave~~ with amplitude 1.41*Vtrans when fully loaded (where Vtrans would be the 12.6V or 16V rated value of the transformer). The amplitude will be somewhat higher if there is no load on the transformer or just a minimal load. The voltage between the transformer center-tap and either of the other two legs is 1/2 of this value.		The waveform across the output of the transformer (pins 5,8) is a sine wave with amplitude 1.41*Vtrans when fully loaded (where Vtrans would be the 12.6V or 16V rated value of the transformer). The amplitude will be somewhat higher if there is no load on the transformer or just a minimal load. The voltage between the transformer center-tap and either of the other two legs is 1/2 of this value.

	[[IMAGE:sinewave_nolabel.gif]]		[[IMAGE:sinewave_nolabel.gif]]
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	[[IMAGE:sinewave_rect.gif]]		[[IMAGE:sinewave_rect.gif]]

	~~===''Dual-Secondary Transformer''===~~

	This is a transformer that has two sets of output windings that may be connected either in series or parallel. An example of this is the Tamura 3FS-412 Transformer that is shown in the schematic below. This transformer has two output windings, each good for 6.3VAC at 0.5A each. The output windings can be connected in series to provide 12.6VAC at 0.5A (with an optional center-tap), or in parallel to provide 6.3VAC at 1.0A. Note that the output windings have polarity, so that care must be taken to avoid creating short circuits by mis-wiring the outputs.

	~~The Ren-T board provides the proper holes so that this Tamura transformer can be soldered onto the board (here, picture to be added).~~

	=='''Assembly'''==		=='''Assembly'''==
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	'''''Connecting PC to first controller without converting to RS485'''''		'''''Connecting PC to first controller without converting to RS485'''''

	~~:'''1. Using a Center-Tap Transformer with the Center-Tap connected'''~~
	::* D1, D2, D3, R1, R2, P1, JR1, J1 (shunt), J2 (shunt)		::* D1, D2, D3, R1, R2, P1, JR1, J1 (shunt), J2 (shunt)

	~~:'''2. Using a Transformer without a Center-Tap (or a disconnected Center-Tap)~~
	~~::* D1, D2, D3, D5, D6, R1, R2, P1, JR1, J1 (shunt), J2 (shunt)~~

	===Case 2===		===Case 2===
	'''''Connecting one Controller to the next (RS485 pass-through) '''''		'''''Connecting one Controller to the next (RS485 pass-through) '''''

	~~:'''1. Using a Center-Tap Transformer with the Center-Tap connected '''~~
	::* D1, D2, D3, R1, R2, JR1, JR2 (omit shunts)		::* D1, D2, D3, R1, R2, JR1, JR2 (omit shunts)

	~~:'''2. Using a Transformer without a Center-Tap (or a disconnected Center-Tap)'''~~
	~~::* D1, D2, D3, D5, D6, R1, R2, JR1, JR2 (omit shunts)~~

	===Case 3===		===Case 3===
	'''''Connecting PC to first controller, converting to RS485 in the process '''''		'''''Connecting PC to first controller, converting to RS485 in the process '''''

	~~:'''1. Using a Center-Tap Transformer with the Center-Tap connected'''~~
	::*D1, D2, D3, D4, D7, R1, R2, P1, JR1, U1, U2, U3, C1, C2 (omit shunts)		::*D1, D2, D3, D4, D7, R1, R2, P1, JR1, U1, U2, U3, C1, C2 (omit shunts)

	~~:'''2. Using a Transformer without a Center-Tap (or a disconnected Center-Tap)'''~~
	~~::*D1, D2, D3, D4, D5, D6, D7, R1, R2, P1, JR1, U1, U2, U3, C1, C2 (omit shunts)~~

	=='''BOM'''==		=='''BOM'''==
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	*'''C2''' ~ 1 - 140-XRL16V470-RC - Radial Electrolytic Capacitors 10V 470uF 20%		*'''C2''' ~ 1 - 140-XRL16V470-RC - Radial Electrolytic Capacitors 10V 470uF 20%

	'''D1, D2, D4~~, D5, D6~~, D7''' ~ 6 - 625-1N5819-E3 - Schottky Rectifiers Vr/40V Io/1A ~~*(''Different configs do not require 6 diodes!'')*~~		'''D1, D2, D4, D7''' ~ 4 - 625-1N5819-E3 - Schottky Rectifiers Vr/40V Io/1A

	'''D3''' ~ 1 - 604-WP7104GT ('''''or''''')* 604-WP7104IT - LED > GT = Green ~ IT = Red		'''D3''' ~ 1 - 604-WP7104GT ('''''or''''')* 604-WP7104IT - LED > GT = Green ~ IT = Red
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	=='''Schematic'''==		=='''Schematic'''==
	[[Image:Ren-T schematic.gif]]		[[Image:Ren-T schematic.gif]]

			=='''History'''==

			2007/09/03 Removed references to non-center-tapped transformer, as they do not always reliably provide a good zero-crossing signal.

Phil Short at 23:42, 3 September 2007

2007-09-03T23:42:02Z

← Older revision		Revision as of 23:42, 3 September 2007
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	41PG300 - 12.6CT .3A		41PG300 - 12.6CT .3A

	~~838-3FS-412 - 12.6VAC 6.0VA Single Primary~~

	~~838-3FD-412 - 12.6VAC 6.0VA Dual Primary ('''for 230V INPUT!''')~~

	*The transformers listed are not the only ones that can be used. They are what was used during the design and testing and are direct fits for the pads of the PCB.		*The transformers listed are not the only ones that can be used. They are what was used during the design and testing and are direct fits for the pads of the PCB.

Phil Short at 21:21, 17 August 2007

2007-08-17T21:21:12Z

← Older revision		Revision as of 21:21, 17 August 2007
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	[[IMAGE:Xformer_conn2.gif]]		[[IMAGE:Xformer_conn2.gif]]

	The effective schematic (taking into account the parts which are not installed) is here ~~(note that there is an error in this schematic...D5 should be D2)~~:		The effective schematic (taking into account the parts which are not installed) is here:

	[[IMAGE:~~xformer_ct~~.~~GIF~~]]		[[IMAGE:Xformer_ct.gif]]

	The waveform across the output of the transformer (pins 5,8) is a sinewave with amplitude 1.41*Vtrans when fully loaded (where Vtrans would be the 12.6V or 16V rated value of the transformer). The amplitude will be somewhat higher if there is no load on the transformer or just a minimal load. The voltage between the transformer center-tap and either of the other two legs is 1/2 of this value.		The waveform across the output of the transformer (pins 5,8) is a sinewave with amplitude 1.41*Vtrans when fully loaded (where Vtrans would be the 12.6V or 16V rated value of the transformer). The amplitude will be somewhat higher if there is no load on the transformer or just a minimal load. The voltage between the transformer center-tap and either of the other two legs is 1/2 of this value.

Phil Short at 21:13, 17 August 2007

2007-08-17T21:13:11Z

← Older revision		Revision as of 21:13, 17 August 2007
Line 9:		Line 9:
	The input voltage of the transformer must be the same as the AC line voltage available in your locale. You cannot use a 120VAC transformer in a location with 240 VAC power, nor can you use a 240VAC transformer if your local power is 120VAC. There are some transformers with dual primaries that can be wired up to accept either 120 or 240 VAC, but discussion of how to use these is beyond the scope of this page.		The input voltage of the transformer must be the same as the AC line voltage available in your locale. You cannot use a 120VAC transformer in a location with 240 VAC power, nor can you use a 240VAC transformer if your local power is 120VAC. There are some transformers with dual primaries that can be wired up to accept either 120 or 240 VAC, but discussion of how to use these is beyond the scope of this page.

	===''~~Non~~ Center-~~Tapped~~ Transformer''===		===''Regular (No Center-Tap) Transformer''===

	This is a transformer which has effectively one single output winding with two connections (at each end of the output winding). This is functionally the same as a center-tapped transformer (see the next section) in which the center-tap wire is ~~left dis-connected~~ (by cutting it off or placing a wire-nut or electrical tape over it).		This is a transformer which has effectively one single output winding with two connections (at each end of the output winding). This is functionally the same as a center-tapped transformer (see the next section) in which the center-tap wire is disconnected (by cutting it off or placing a wire-nut or electrical tape over it).

	If you use this type of transformer, the output voltage of this type of transformer should be 6.3VAC or 8VAC, and the output wires of the transformer should be connected to here and here on the PCB. ~~(picture to be added)~~. The effective schematic ends up looking like this after taking into account the diodes which are actually installed:		If you use this type of transformer, the output voltage of this type of transformer should be 6.3VAC or 8VAC, and the output wires of the transformer should be connected to here and here on the PCB.

			[[IMAGE:Xformer_conn1.gif]]


			The effective schematic ends up looking like this after taking into account the diodes which are actually installed:

	[[IMAGE:xformer_regular.GIF]]		[[IMAGE:xformer_regular.GIF]]
Line 29:		Line 34:
	This is a transformer which has a single output winding with three connections (one at either end of the winding, and one in the exact middle), in which the middle connection (the center-tap) is to be used. One disadvantage of this circuit is that the iron and copper in the transformer is only used with 50% effectiveness (compared with the four-diode, non center-tapped circuit) because at any point in time only half of the transformer is supplying current.		This is a transformer which has a single output winding with three connections (one at either end of the winding, and one in the exact middle), in which the middle connection (the center-tap) is to be used. One disadvantage of this circuit is that the iron and copper in the transformer is only used with 50% effectiveness (compared with the four-diode, non center-tapped circuit) because at any point in time only half of the transformer is supplying current.

	If you use this type of transformer (and use the center-tap), the output voltage should be either 12.6VAC or 16 VAC, and the output wires should be connected ~~to here,~~ here (~~center-tap~~) ~~and~~ here. ~~(picture to~~ be ~~added~~).		If you use this type of transformer (and use the center-tap), the output voltage should be either 12.6VAC or 16 VAC, and the output wires from the transformer should be connected as shown here.

			[[IMAGE:Xformer_conn2.gif]]

			The effective schematic (taking into account the parts which are not installed) is here (note that there is an error in this schematic...D5 should be D2):

	[[IMAGE:xformer_ct.GIF]]		[[IMAGE:xformer_ct.GIF]]

← Older revision		Revision as of 03:14, 29 January 2011
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			[[Category:Renard]]
	[[Category:Ren-T]]		[[Category:Ren-T]]
	[[Category:~~Renard~~]]		[[Category:Ren-C]]
			[[Category:DIYC Index]]