Wiring

There will be (16) 14-pin headers for vial controls. The pinout is as follows:

*Pin*	*Function*	*Module No*
1	Spare_A +	7
2	Spare_A -	7
3	Spare_B +	6
4	Spare_B -	6
5	PhotoDiode +	5
6	PhotoDiode -	5
7	LED +	4
8	LED -	4
9	TempSensor +	3
10	TempSensor -	3
11	Heater +	2
12	Heater -	2
13	Motor +	1
14	Motor -	1

There will be (7) sites for plug-in Analog or PWM boards. Each plug-in module will have two 25-pin headers with pinout given below. In addition there are two 10-pin headers on the PWM boards to supply 24V power.

Left			Right
1	GND	Signal GND	2	Signal GND
3	CH00	Analog In/Out channel 0	4	Analog In/Out channel 1
5	PWR	Analog Power (24V)	6	Analog Power (24V)
7	CH02	Analog In/Out channel 2	8	Analog In/Out channel 3
9	PWR	Analog Power (24V)	10	Analog Power (24V)
11	CH04		12
13	PWR		14
15	CH06		16
17	PWR		18
19	GND		20
21	CH08		22
23	PWR		24
25	CH10		26
27	PWR		28
29	CH12		30
31	PWR		32
33	CH14		34
35	PWR		36
37	GND	Signal GND	38	Signal GND
39	CTRL0	Control logic I/O 0	40	Analog Ref
41	CTRL1	Control logic I/O 1	42	Analog Out
43	CTRL2	Control logic I/O 2	44	-spare-
45	CTRL3	Control logic I/O 3	46	5V
47	CTRL4	Control logic I/O 4	48	5V
49	GND	Signal GND	50	Signal GND

There will be four sites for ARM processor modules (SparkFun? SAM D21 mini breakout) with 24 pins each. Wiring to the analog/PWM sites will be as shown in the block diagram. Below is the pin wiring for the processor sites. Note that the odd numbering matches that on the SparkFun? schematic.

Left			Right
Route to RS-485 TXn	Tx	12		1	Vin	5V
Route to RS-485 RXn	Rx	11		2	GND	GND
-nc-	nRST	10		3	AREF	-nc-
GND	GND	9		4	3.3V	-nc-
CTRL0 to PWM	D2	8		5	A3	CTRL3 to ADC
CTRL1 to PWM	D3	7		6	A2	-nc-
CTRL2 to PWM	D4	6		7	A1	-nc-
CTRL3 to PWM	D5	5		8	A0	ADC Analog Out
CTRL4 to PWM	D6	4		9	D13/SCK	-nc-
CTRL0 to ADC	D7	3		10	D12/MISO	-nc-
CTRL1 to ADC	D8	2		11	D11/MOSI	RS-485 TXEn
CTRL2 to ADC	D9	1		12	D10/SS	-nc-

There will be one site for a four-channel RS-485 transceiver board. Pinout below.

Left		-----	Right
1	GND		GND	1
2	Tx1		Tx3	2
3	Rx1		Rx3	3
4	En1		En3	4
5	Tx2		Tx4	5
6	Rx2		Rx4	6
7	En2		En4	7
8	5V		A	8
9	GND		B	9

Power

• Samtec "Power Mate" Family (~10A/pin)
  • PMSS series cables, mates with IPBT connectors
• Molex ultra-fit (~10A/pin)
  • WM11876-ND (header)
  • WM11642-ND (plug)
  • WM11558CT-ND (crimp terminal 16-18 AWG)

Other Notes

Need RS-485 transceivers, e.g. Digi-Key 497-6540-1-ND