Thermo Scientific MIE ADR-1500 Instruction Manual page 137

Thermo Fisher Scientific
The switched alarm output is used to close the circuit of a DC powered
device and its power supply at the negative side. For example:
1. The negative terminal of a battery or common ground of a power
supply is connected to Pin #5, pDR-1500 ground.
2. The load's (device's) return or negative is connected to #4 (switch
alarm output).
3. The positive of the load and battery, or power supply, are connected
together.
The minimum external load impedance for this output is 10 kilo-ohms.
Outputs and Alarm
MIE ADR-1500 Instruction Manual 7-5