| Device name | TFM420MA |
| Description
| Module 2 entries 4-20mA |
| Communication protocol
| FIRE-SPEED |
| Address
| 2 rotary selectors |
| Busy addresses | 1 address for each entry (máx.2) |
| Frequency of interrogation
| 2 levels |
| Communication WITNESS | Signaling that can be excluded |
| Performance criteria
| 4 |
| Pre-alarm threshold (mA) | Programmable |
| Alarm threshold (mA) | Programmable |
| Power
| From loop |
| Nominal voltage | 24VDC |
| Operating voltage
| 18V...30VDC |
| Standby absorption | 410μA @ 24V DC in absence of communication |
| Absorption in alarm | 2,3mA @ 24V DC |
| Repeater output | 9,4V DC 6mA (protected) |
| Line separator | Intelligent isolator (no device loss) |
| External power supply | Range from 18 to 30V DC |
| Power output +SENS | Max. absorption. total 500mA |
| Inputs 4-20 | Max. current. sensor output 70mA |
| Input nominal impedance | 152 ohm (to ground) |
| Exercise temperature | -15°C...+70°C |
| Relative humidity | 10%...93% (in absence of condensation) |
| Degree of protection | IP40 |
| Container | ABS V0 |
| Dimensions (L x W x D) | 112 x 78 x 25mm |
| Weight | 165g |
| Standards | EN 54-18: 2005/AC: 2007 - EN 54-17: 2005 |
| Certificate of homologation | 1293-CPR-0491 |
| Year of CE marking | 15 |
| Benefit statement number | 012_TFM420MA |
| Certification body | EVPU |
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