TC electronic SDN BHD P2 manual GPI Technical specifications, Mode, 1 of, System - I/O Page

SYSTEM - I/O PAGE

		RL1	preset 1
		off
		on	preset 2
		tip	GPI Input
RL1
		ring
	nc		Select 1 of 2
		sleeve

	RL2	RL1	preset 1
	off	off
	off	on	preset 2
RL2	on	off	preset 3
R2, 22k	on	on	preset 4
RL1		tip	GPI Input
R1, 12k	nc	ring	Select 1 of 4
		sleeve

RL3

R3, 47k

RL2

R2, 22k

RL1

R1, 12k

RL3	RL2	RL1
off	off	off	preset 1
off	off	on	preset 2
off	on	off	preset 3
off	on	on	preset 4
on	off	off	preset 5
on	off	on	preset 6
on	on	off	preset 7
on	on	on	preset 8
		tip	GPI Input
nc		ring	Select 1 of 8
		sleeve

GPI Technical specifications

Inside the processor, a 10kohm resistor connects the Tip terminal to a +5V power supply. When nothing is connected to the GPI input, the input voltage therefore is +5V. Resistors can be used to pull down the voltage as suggested in Fig 1.

In Table 1, voltages outside the limits mentioned are to be considered invalid. No action is taken if invalid measurements are made. GPI recall action resumes when a stable, valid measurement again is detected.

Mode	Preset No	Target / Vs	Min typ / V	Target typ / V	Max typ / V
1 of 2
	1	1.000	2.67	5.00	5.00
	2	0.000	0.00	0.00	0.51
1 of 4
	1	1.000	4.16	5.00	5.00
	2	0.687	3.38	3.44	3.50
	3	0.545	2.67	2.73	2.79
	4	0.438	0.00	2.19	2.25
1 of 8
	1	1.000	4.50	5.00	5.00
	2	0.824	4.06	4.12	4.18
	3	0.687	3.38	3.44	3.50
	4	0.600	2.94	3.00	3.06
	5	0.545	2.67	2.73	2.79
	6	0.489	2.38	2.44	2.50
	7	0.437	2.13	2.19	2.25
	8	0.400	0.00	2.00	2.06

Rather than absolute voltage measurements, the windows are defined as a fraction of the supply voltage, Vs. This voltage can be measured with a high impedance DMM on the Tip terminal when no pull down resistors are applied.The table shows values as a fraction of Vs, and, as a guideline, typical voltages when Vs=5.000V. (If the Supply voltage is e.g. 5.015V, the table should be corrected by multiplying these values by 5.015/5).

20