[Yurtman]

I'm looking at getting a similar Normally Open ETS. I'm a llittle confused with the spec for the output: 'Output specification: DC60V 100mA(resistance load)/ AC60V 100mA(peak)/ 500mW(Max)'

I thought the output was simply sinking the orange to ground, and for the overtravel protection simply opening the ordinarily closed green and blue. What's the 60V output all about?

[rdsi]

'Output specification: DC60V 100mA(resistance load)/ AC60V 100mA(peak)/ 500mW(Max)' What's the 60V output all about?

This sounds like the contact rating. Tormach uses 12VDC so you would be well within its spec.

[Yurtman]

The contact rating is 24V. Full specs here:

Model: CS-100K-50
Output mode: A: NO(normally open)
Stroke: 5mm

Contact life: 3 million times
Waterproof level: IP 67
Repeated positioning accuracy: 0.001mm(operation : 50-200mm/min)
Contact force: 1.5N
Contact material: Hard alloy, tungsten steel

Cutter ia.50mm, Height 110mm/4.3in

Surface treatment: Grinding 4S

Contact rate: DC24V 20mA(), recommend 10mA resistive load

Cable: Standard oil proof cable(6 cores)

LED light: Often off, on when working
Power supply voltage: DC24V
Consumption current: 10mA
Output specification: DC60V 100mA(resistance load)/ AC60V 100mA()/ 500mW()


Overtravel alarm signal:
Output mode B: NC is normally (emergency stop when the signal is disconnected)
Contact voltage DC24V 20mA resistance load (load required under special circumstances, current limit)

Weight: Approx.906g/32oz

[rdsi]

Yeah, mine has the same thing & I believe this is just the absolute max rating. Typical operation is 24VDC however it does work just fine at 12VDC - although the LED is not very bright.

[Yurtman]

It's odd that it seems to suggest 10-30V are acceptable for input, I can't see why it would have the contractor max at 60V, or why this would be described as output.

[Yurtman]

The specs are very confusing, the contactor is 20ma, but they advise a 10ma resistive load.....given that I have a 24v supply voltage are they suggesting a 2.4k resistor on the input?

[rdsi]

OK, there are a couple of things going on here.

There are ratings for 3 different things.

The device needs a power supply to work and this supply must be 10 to 30VDC. It is typically run at 24VDC and will draw 10mA to operate - 30mA at 30VDC. The Tormach DIN connector supplies 12VDC. You don't need a resistor here, you just need to supply a DC voltage between 10 & 30VDC. Obviously, it's not wise to run it at either extreme but some where in between - 12 or 24VDC is good.

The trigger output relay is really an NC electronic switch and is rated for 60V AC or DC with a max 100mA current rating. They are also saying you must limit the device power dissipation to 500mW. The Tormach DIN connector trigger input uses a 5VDC source in series with a 470 ohm resistor, LED (1.8V) and optoisolator (1.5V). So this switch must be able to switch this load to ground. No problem here because we are well under 60V and only switch about 5 * (5 - 1.8 - 1.5) / 470 = 18mW of power. All that is needed is to connect the wires between the output relay and the Tormach DIN connector trigger input and ground pins.

The over-travel NC relay is rated for 24DC @ 100mA. So don't use more than 24VDC & limit the current to 100mA through it. Most people don't use this relay but it might be a good idea to have it stop all motion. There is no way to do this through the Tormach DIN connector but one may be able to hook this in series with the limit switches common wire to effectively stop the machine.