MTL1372 RTD device input converter and trip amplifier

MTL1372 RTD device input converter and trip amplifier

1 channel for PT100 type RTD sensors, 2 alarm outputs The MTL1372 is a single channel signal converter which can accept PT100 RTD inputs and converts the signal to 4-20mA. Ranges are selected by the user using switches on the module. 2 trip amplifiers are also provided with level settings. The module may be powered directly or via the PBUS17.5 power feed in the DIN rail.

Terminals Function MTL1372 RTD

1 Input

2 Input -

3 3 wire -

4 wire - 4 4 wire +

9 Trip 1 contact (NO)

10 Trip 1 contact

11 Trip 2 contact (NO)

12 Trip 2 contact

13 Output +

14 Output -

15, E Power supply +ve

16, D Power supply -ve

SPECIFICATION see also common specification

Number of channels One with fully floating input and output

Location of equipment Safe area

Input signal PT100 RTD sensors, 3 or 4 wire connection

Range selection Via switches, refer to instructions

Output signal 4-20mA, current source or current sink

Over-range ;22mA

Response time 500mS

Transfer accuracy at 20 °C 0.2%

Temperature drift 0.01% /°C

Relay characteristics Contact rating: 250V ac, 2A cosØ 0.7, 340V dc, 2A resistive load

Current consumption 80mA max, 55mA typical @24V

Power dissipation 0.6W

Isolation 250V ac or dc between power, field and system circuits.

(tested to 1100Vac)