Output Switches - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Output Switches

Introduction
The SVI II ESD supports two identical contact outputs, SW #1 and SW #2 (Digital Output
switches), that can be logically linked to status bits. The Digital Output switch terminals are
solid state contacts. Each switch requires its own power source and must be connected to the
appropriate connector on the Electronics Module Terminal Board.
The switches are polarity sensitive and must be connected only to a DC circuit. The switch (+)
terminal must be electrically positive with respect to the (–) terminal. If the (+) terminal is
electrically negative with respect to the (–) terminal, then the switch will conduct.
There must be a series load in the circuit to prevent damage to the switch. If the switch is
connected directly across the power source the current will be limited only by the
capacity of the power source and the switch can be damaged.
General Configuration Notes
This section discusses the necessary precautions when configuring a system.
V
SWITCH
I
SWITCH
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
V. It is essential that the external circuit controls voltage such that the switch saturation
voltage is maintained.
© 2016 General Electric Company. All rights reserved.
Switch OFF
30 VDC max.
 0.200 mA (Switch leakage current)
Incorrect polarity connection results in an effectively closed
CAUTION
connection.
Consult with qualified personnel to ensure that electrical
CAUTION
requirements for the switch are met.
Switch ON
 1 V (Switch saturation voltage)
1 A max.
Masoneilan SVI II ESD Installation and Maintenance Manual
| 127
=