Description
The GMC 8420 evaluation unit is a convenient evaluation system for wall mounting.
The GMC 8420 gas measuring computer in conjunction with sensors with 4-20 mA signal output has the following functions:
● Measurement and display of the gas concentration.
● Monitoring and warning of these gases.
● Triggering of protective measures to counteract an increase in the concentration
.
The GMC 8420 can be used directly for alerting with its internal signaling device, or it can also control external signaling devices.
Up to 4 measuring points can be connected. All our 4 – 20 mA sensors are suitable for this.
The RK 8420 was developed for additional functionality. It has four freely programmable relay outputs for alarm 1, 2 and horn.
The GMC 8420 was developed for connecting sensors in EX zone 2.
Core features of the GMC8420:
- Up to 4 gas sensors
- 4 to 20 mA
- Concentration display
- 2 alarm levels and additional horn output
- Checking the alarm output without test gas.
- Fault monitoring at:
– Power failure
– Computer fault
– Wire break / short circuit in the sensor lines - Potential-free relay outputs for:
– 3 freely programmable relays for alarm 1, alarm 2, horn
– 1 fault alarm relay
Available accessories:
- Output extension RK 8420 – for 4 freely programmable relay outputs, e.g. for alarm 1, 2 and horn.
- Various gas sensors – our Ex detectors
- Central emergency power supply
- Connection cable for programming (USB)
- Horns
- Warning lights
- Solenoid valves