MTL5314 TRIP AMPLIFIER 4/20mA, for 2- or 3-wire transmitters
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.
MTL5314 product specification SPECIFICATION See also common specification 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: 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 25Ω maximum Response time
Trip-points can be adjusted by the user via multiturn
potentiometers accessible on the top of the unit.
Trip-point range 0.5 to 22mA
Effective resolution 20μA
Trip-point drift with temperature 1.5μA/°C max.
Hysteresis min 1% of trip-point range
max 1.7% of trip-point range Relay type
Single pole, changeover contacts
Note: reactive loads must be adequately suppressed Relay characteristics
Contact rating 250V ac, 2A, cosø >0.7
40V dc, 2A, resistive load
Contact life expectancy 3.3x105 operations LED indicators
Power LED green, illuminated when the power is connected to
Status LED yellow, one per trip, illuminated when relay is
energised (not tripped) Supply voltage
20 to 35V dc Maximum current consumption (with 20mA signal)
85mA at 24V
100mA at 20V
60mA at 35V Maximum power dissipation within the unit
(with 20mA signal)
1.7W at 24V
1.8W at 35V
Other related product models for MTL5314 as below for your reference.
MTL5523V – V
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