The MTL5314 connects to a 2- or 3-wire 4/20mA transmitter or current source located in the hazardous area. It supplies one or two configurable alarm signals to the safe area via changeover relays. Each relay may be configured individually to signal an alarm condition (relay de-energised) when the input signal is greater than or less than a pre-set value. In addition, the MTL5314 can be connected in series to the hazardous-area side of an MTL5541 4/20mA repeater power supply (or equivalent device) to provide two trip alarm outputs direct from the transmitter signal (see schematic diagram). Looping the transmitter signal through the MTL5314 (via terminals 1 and 3) does not affect HART® communications.



Manufacturer : EATON MTL Instruments

Product No. : MTL5314

Product type : Trip Amplifier

Number of channels : One, with two configurable alarms

Location of field equipment : Zone 0, IIC, T4–T6 hazardous area, if suitably certified Div 1, Group A, hazardous location

Safe-area output : Two relays with changeover contacts

Hazardous-area input : Signal range is 0 to 24mA (including over-range)

Voltage available for transmitter (terminals 1 and 2) : >17V at 20mA

Current input (terminals 1 to 3) : Input resistance 25O maximum

Response time : <75ms

Relay type : Single pole, changeover contacts

LED indicators : Power LED green, illuminated when the power is connected to the module. Status LED yellow, one per trip, illuminated when relay is energised (not tripped).

Supply voltage : 20 to 35V dc