GE SVi 1000 Masonelian Quick Start Manual page 62

The maximum voltage that can be applied to the digital switch outputs is 30 VDC. This is an open
circuit parameter (the digital switch is in the open state). Under open circuit conditions, the
switch current will be less than 0.200 mA.
The switch maximum current rating is 1 A. When the switch is ON, the typical switch voltage is 
1 V. It is essential that the external circuit controls voltage such that the switch saturation voltage
is maintained.
When the switch is on (closed) the external voltage must be dropped across the load (Figure 38).
Load is designed to ensure that voltage across the switch is < 1 V.
SVi1000 Switch
Output: 1 V
with switch ON
Figure 38 Simplified Switch Installation Drawing: Correct Configuration
62 | =GE Oil & Gas
CAUTION
LOAD
The load must be designed such that the current in
the circuit is  1 A at all times. Some 3rd party
devices, such as incandescent lamps or solenoids,
require surge and back EMI protection to limit
current to  1 A.
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External
Voltage
Source
.