7501Tx relay racks - Revision history

JL: /* Using with Sensoray 2410 */

2018-07-16T14:45:27Z

Using with Sensoray 2410

← Older revision		Revision as of 09:45, 16 July 2018
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	==Using with Sensoray 2410==		==Using with Sensoray 2410==

	~~The~~ relay rack requires 5 VDC operating power, which must be supplied by an external power supply connected to the +5V and GND terminals.		A Sensoray 7501T8/16/24 relay rack requires 5 VDC operating power, which must be supplied by an external power supply connected to the relay rack's +5V and GND terminals.

	Use a 50-conductor flat cable to connect the relay rack to the 50-pin header on the 2410 module. The pin function table shows the GPIO associated with each SSR. For example, SSR2 is associated with GPIO21.		Use a 50-conductor flat cable to connect the relay rack to the 50-pin header on the 2410 module. The pin function table (see above) shows the GPIO associated with each SSR. For example, SSR2 is associated with GPIO21.

	An output SSR is controlled by writing to the associated GPIO, whereas an input SSR is monitored by reading the GPIO. Model 2410 ~~has~~ active-low ~~GPIOs~~ and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.		An AC or DC output SSR is controlled by writing to the associated GPIO, whereas an AC or DC input SSR is monitored by reading the GPIO. Model 2410 GPIOs employ active-low logic and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.

JL: /* Pinout */

2018-07-13T18:14:04Z

Pinout

← Older revision		Revision as of 13:14, 13 July 2018
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	\|-		\|-
	\|}		\|}

			===Header===

	The relay rack has a 50-pin header which is compatible with several Sensoray GPIO products, including models 826 and 2410.		The relay rack has a 50-pin header which is compatible with several Sensoray GPIO products, including models 826 and 2410.

	All even-number ~~header~~ pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.		All even-number pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.

			Unused, odd-number pins are not connected (NC) to circuitry on the relay rack. For example, in the case of model 7501T8, odd-number pins in the range [1:31] are NC.

	===Field wiring===		===Field wiring===

JL: /* Field wiring */

2018-07-13T18:02:27Z

Field wiring

← Older revision		Revision as of 13:02, 13 July 2018
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	The relay rack includes screw terminal blocks for connecting to field wiring. Two terminals are provided for each SSR, designated "+" and "-" in the pin function table.		The relay rack includes screw terminal blocks for connecting to field wiring. Two terminals are provided for each SSR, designated "+" and "-" in the pin function table.

	In the case of an AC relay, the voltage polarity across the two terminals ~~is irrelevant~~. However, when using a DC relay ~~(input or output)~~, you must ensure that the field wiring has the correct polarity. For example, in the case of ~~field wiring for~~ SSR2 (which uses terminals 5 and 6), the voltage at terminal 5 ~~must~~ never be negative with respect to terminal 6.		In the case of an AC relay, the voltage polarity across the two terminals doesn't matter. However, when using a DC relay, you must ensure that the field wiring has the correct polarity. For example, in the case of SSR2 (which uses terminals 5 and 6), the voltage at terminal 5 should never be negative with respect to terminal 6.

	==Rack power==		==Rack power==

JL: /* Field wiring */

2018-07-13T18:00:41Z

Field wiring

← Older revision		Revision as of 13:00, 13 July 2018
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	===Field wiring===		===Field wiring===

	The relay rack includes screw terminal blocks for connecting to field wiring. Two terminals are provided for each SSR, ~~which are~~ designated "+" and "-" in the pin function table.		The relay rack includes screw terminal blocks for connecting to field wiring. Two terminals are provided for each SSR, designated "+" and "-" in the pin function table.

	In the case of an AC relay, the voltage polarity across the two terminals is irrelevant. However, when using a DC relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses terminals 5 and 6), the voltage at terminal 5 must never be negative with respect to terminal 6.		In the case of an AC relay, the voltage polarity across the two terminals is irrelevant. However, when using a DC relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses terminals 5 and 6), the voltage at terminal 5 must never be negative with respect to terminal 6.

JL at 17:59, 13 July 2018

2018-07-13T17:59:17Z

← Older revision		Revision as of 12:59, 13 July 2018
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	! rowspan="2" \| SSR<br>Socket		! rowspan="2" \| SSR<br>Socket
	! rowspan="2" \| Header<br>Pin		! rowspan="2" \| Header<br>Pin
	! rowspan="2" \| ~~TB Pins~~<br>(+/-)		! rowspan="2" \| Terminals<br>(+/-)
	! colspan="2" \| Model 826		! colspan="2" \| Model 826
	! rowspan="2" \| Model<br>2410		! rowspan="2" \| Model<br>2410
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	All even-number header pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.		All even-number header pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.

	===~~TB pins~~===		===Field wiring===

	The relay rack includes screw terminal blocks ~~(listed as "TB pins" in the pin function table)~~ for connecting to field wiring. Two terminals are provided for each SSR, which are designated "+" and "-".		The relay rack includes screw terminal blocks for connecting to field wiring. Two terminals are provided for each SSR, which are designated "+" and "-" in the pin function table.

	In the case of an AC relay, the voltage polarity across the two ~~TB pins~~ is irrelevant. However, when using a DC relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses ~~TB pins~~ 5 and 6), the voltage at ~~pin~~ 5 must never be negative with respect to ~~pin~~ 6.		In the case of an AC relay, the voltage polarity across the two terminals is irrelevant. However, when using a DC relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses terminals 5 and 6), the voltage at terminal 5 must never be negative with respect to terminal 6.

	==Rack power==		==Rack power==

JL: /* TB pins */

2018-07-13T17:56:44Z

TB pins

← Older revision		Revision as of 12:56, 13 July 2018
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	===TB pins===		===TB pins===

	The relay rack includes screw terminal blocks for connecting field wiring. Two terminals are provided for each SSR, which are designated "+" and "-" ~~in the pin function table~~.		The relay rack includes screw terminal blocks (listed as "TB pins" in the pin function table) for connecting to field wiring. Two terminals are provided for each SSR, which are designated "+" and "-".

	~~The~~ polarity is irrelevant ~~for AC relays~~. However, when using a DC ~~type~~ relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses TB pins 5 and 6), the voltage at pin 5 must never be negative with respect to pin 6.		In the case of an AC relay, the voltage polarity across the two TB pins is irrelevant. However, when using a DC relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses TB pins 5 and 6), the voltage at pin 5 must never be negative with respect to pin 6.

	==Rack power==		==Rack power==

JL: /* TB pins */

2018-07-13T17:44:50Z

TB pins

← Older revision		Revision as of 12:44, 13 July 2018
Line 79:		Line 79:

	The relay rack includes screw terminal blocks for connecting field wiring. Two terminals are provided for each SSR, which are designated "+" and "-" in the pin function table.		The relay rack includes screw terminal blocks for connecting field wiring. Two terminals are provided for each SSR, which are designated "+" and "-" in the pin function table.

			The polarity is irrelevant for AC relays. However, when using a DC type relay (input or output), you must ensure that the field wiring has the correct polarity. For example, in the case of field wiring for SSR2 (which uses TB pins 5 and 6), the voltage at pin 5 must never be negative with respect to pin 6.

	==Rack power==		==Rack power==

JL: /* Pinout */

2018-07-13T17:31:10Z

Pinout

← Older revision		Revision as of 12:31, 13 July 2018
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	All even-number header pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.		All even-number header pins are shorted together and to the GND terminal. The odd-number pins are assigned as shown in the pin function table.

			===TB pins===

			The relay rack includes screw terminal blocks for connecting field wiring. Two terminals are provided for each SSR, which are designated "+" and "-" in the pin function table.

	==Rack power==		==Rack power==

JL: /* Using with Sensoray 2410 */

2018-07-13T17:26:08Z

Using with Sensoray 2410

← Older revision		Revision as of 12:26, 13 July 2018
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	The relay rack requires 5 VDC operating power, which must be supplied by an external power supply connected to the +5V and GND terminals.		The relay rack requires 5 VDC operating power, which must be supplied by an external power supply connected to the +5V and GND terminals.

	Use a 50-conductor flat cable to connect the relay rack to the 50-pin header on the 2410 module. The ~~Pin~~ function table shows the GPIO associated with each SSR. For example, SSR2 is associated with GPIO21.		Use a 50-conductor flat cable to connect the relay rack to the 50-pin header on the 2410 module. The pin function table shows the GPIO associated with each SSR. For example, SSR2 is associated with GPIO21.

	An output SSR is controlled by writing to the associated GPIO, whereas an input SSR is monitored by reading the GPIO. Model 2410 has active-low GPIOs and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.		An output SSR is controlled by writing to the associated GPIO, whereas an input SSR is monitored by reading the GPIO. Model 2410 has active-low GPIOs and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.

JL: /* Using with Sensoray 826 */

2018-07-13T17:25:57Z

Using with Sensoray 826

← Older revision		Revision as of 12:25, 13 July 2018
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	The relay rack requires 5 VDC operating power, which typically is supplied by an external power supply connected to the +5V and GND terminals. Alternatively, you may modify the relay rack as follows: On the bottom of the relay rack, attach a wire (via solder) from the +5V terminal to J1 pin 49. This will use +5 V from the 826 board to power the relay rack.		The relay rack requires 5 VDC operating power, which typically is supplied by an external power supply connected to the +5V and GND terminals. Alternatively, you may modify the relay rack as follows: On the bottom of the relay rack, attach a wire (via solder) from the +5V terminal to J1 pin 49. This will use +5 V from the 826 board to power the relay rack.

	Use a 50-conductor flat cable to connect the relay rack to header J2 or J3 on the 826 board. The ~~Pin~~ function table shows the GPIO associated with each SSR. For example, if the relay rack is connected to J2 then SSR2 will be associated with GPIO26.		Use a 50-conductor flat cable to connect the relay rack to header J2 or J3 on the 826 board. The pin function table shows the GPIO associated with each SSR. For example, if the relay rack is connected to J2 then SSR2 will be associated with GPIO26.

	An output SSR is controlled by writing to the associated GPIO, whereas an input SSR is monitored by reading the GPIO. Model 826 has active-low GPIOs and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.		An output SSR is controlled by writing to the associated GPIO, whereas an input SSR is monitored by reading the GPIO. Model 826 has active-low GPIOs and the relay rack is designed for active-low signaling. Consequently, you must write '1' to turn on an output SSR and write '0' to turn it off. Similarly, when reading an input SSR, '1' indicates the relay is on and '0' indicates off.