Meriam M1500 Digital Pressure Transmitter - Manual (Page 17)

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Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams
Analog Wiring Diagrams Analog Wiring Diagrams Analog Wiring Diagrams Analog Wiring Diagrams
2-wire 4-20 mA, Loop Powered
24 VDC nominal – see “Power Requirements” in the Specifications section of this manual for more detail
Note: Switch outputs are not available in 2-wire 4-20 mA service.
4-wire 4-20mA with Switches
24 VDC nominal – lsolated loop power supply
12 VDC nominal – External power supply
see “Power Requirements” in the Specifications section of this manual for more details
Can be placed
on either side of
the loop.
Not Available
for 2-wire 4-20
mA service
.
4-wire 4-20mA with Switches, con’t
1. For 4-wire commissioning always connect external supply to PWR and GND terminals before
connecting isolated loop supply to LP+ and LP–.
2. Isolated power supply is required for LP+ / LP– loop.
3. Do not short LP– and GND terminals.
4. Switches are solid state, opto-couplers with SPST operation (Clare model CPC1008N). Switch
circuits are isolated from each other and from the M1500 mA output.