Isolated Input (Version 1)

Applies to 1630 Coaxlink Mono, 1631 Coaxlink Duo, 1632 Coaxlink Quad, 1633 Coaxlink Quad G3, 1633-LH Coaxlink Quad G3 LH, 1635 Coaxlink Quad G3 DF, 1637 Coaxlink Quad 3D-LLE, 3602 Coaxlink Octo, 3603 Coaxlink Quad CXP-12, 3603-4 Coaxlink Quad CXP-12, 3620 Coaxlink Quad CXP-12 JPEG, 3620-4 Coaxlink Quad CXP-12 JPEG, 3621 Coaxlink Mono CXP-12, 3621-LH Coaxlink Mono CXP-12 LH, 3622 Coaxlink Duo CXP-12, 3622-LH Coaxlink Duo CXP-12 LH, 3625 Coaxlink QSFP+, 3300 HD26F I/O module for Coaxlink Duo PCIe/104 and 3614 HD26F I/O Extension Module - Standard I/O Set.

1630 Coaxlink Mono 1631 Coaxlink Duo 1632 Coaxlink Quad 1633 Coaxlink Quad G3 1633-LH Coaxlink Quad G3 LH 1635 Coaxlink Quad G3 DF 1637 Coaxlink Quad 3D-LLE 3602 Coaxlink Octo 3603 Coaxlink Quad CXP-12 3603-4 Coaxlink Quad CXP-12 3620 Coaxlink Quad CXP-12 JPEG 3620-4 Coaxlink Quad CXP-12 JPEG 3621 Coaxlink Mono CXP-12 3621-LH Coaxlink Mono CXP-12 LH 3622 Coaxlink Duo CXP-12 3622-LH Coaxlink Duo CXP-12 LH 3625 Coaxlink QSFP+ 3300 HD26F I/O module for Coaxlink Duo PCIe/104 3614 HD26F I/O Extension Module - Standard I/O Set

Isolated Input (Version 1) Simplified schematic

The input port implements an isolated current-sense input.

DC characteristics

Parameter	Conditions	Min.	Typ.	Max.	Units
Differential voltage		-30		+30	V
Input current threshold			1		mA
Differential voltage	@1 mA	1.5	1.65	1.9	V
Input current	@(VIN+ - VIN-) = 1.65 V		1		mA
	@(VIN+ - VIN-) = 2.5 V		2		mA
	@(VIN+ - VIN-) = 5 V		2.3		mA
	@(VIN+ - VIN-) = 12 V		3		mA
	@(VIN+ - VIN-) = 30 V			5	mA
	@(VIN+ - VIN-) < 1 V			10	µA
DC isolation voltage		250			V
AC isolation voltage		170			V_RMS

Input Current vs. Input Voltage Characteristics

AC characteristics

Parameter	Min.	Typ.	Max.	Units
Pulse width	10			µs
Pulse rate	0		50	kHz

Logical map

The state of the port is reported as follows:

Input current	Logical State
IIN > 1 mA	HIGH
IIN < 1 mA	LOW
Unconnected input port	LOW

Compatible drivers and receivers

The following drivers are compatible with the isolated current-sense inputs:

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Totem-pole LVTTL, TTL, 5 V CMOS drivers

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RS-422 Differential line drivers

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Potential free contact, solid-state relay, or opto-isolators

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12 V and 24 V signaling voltages are also accepted

NOTE

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The +12 V power supply on the I/O connector(s) can be used for powering drivers requiring a power supply.

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No external resistors are required. However, to obtain the best noise immunity with 12 V and 24 V signaling, it is recommended to insert a series resistor in the circuit. The recommended resistor values are: 4.7k Ohms for 12 V signaling and 10k Ohms for 24 V signaling.