C-TEC Quantec Monitoring Point, Keyswitch Isolation, Button Reset QT604

Overview

A call system usually relies on someone pressing a button. This unit covers the events nobody presses a button for, such as an exit door opening.

It belongs to C-TEC's Quantec range and sits among the wider nurse call systems on this site. It is a plastic plate with a key, a button and one LED on the front.

How it works

• The trigger: a magnetic contact, a PIR or another switched device changes state, and that change is what the unit watches for.
• The call level: the unit is configured so the event raises either call level. Check the Quantec system's documentation for how that setting is made.
• The shared reset: resetting here also clears devices wired on the same Zone, so think about what else shares that Zone before relying on it.

Where to use it

Typical examples are a fire exit, a drug cupboard, a telephone and a door bell. Think of it as a way of bringing something that only has a switch onto the call system.

As a rule, an IP41 rating gives no protection against splashing, so a dry indoor position is the sensible choice.

What the figures mean in practice

• Humidity limit: the 95% figure is non-condensing, so avoid positions where moisture forms on the plate.
• Temperature: -5ºC to +40ºC leaves little margin in a very cold lobby or next to a heat source.

Installing it

• Back box: flush or surface both work, so choose to suit the wall and the cable route, keeping to the 25mm single gang size.
• The key: as a rule, keep it with whoever is responsible for the system, because it takes this point out of monitoring.
• Testing: as a rule, open the monitored door and confirm the expected call level appears, then isolate it and repeat.

Planning your system

It needs a Quantec system to report to and a switched device to watch. As a rule, door contacts are a common choice for a door or cupboard, so check the one you pick has a normally open or normally closed output.

There is no onboard 6.35mm remote jack socket and no onboard infrared receiver, so it takes neither a remote lead nor an infrared signal directly.

Confirm the codes for the optional slave overdoor light or Call Alert Unit against the rest of the system.

Standards and ratings explained

• IP41: the first digit means protection from solid objects over 1 mm, and the second means protection from water drops falling straight down.