258 43-TV-25-30 Iss.6 GLO Aug 07 UK
16 Digital Inputs
(Not available for the eZtrend QXe recorder)
16 Digital I/O card, this 16-channel card allows the user to configure each channel to be ei-
ther relay output or digital input. Relay output rated at 24V DC 1 Amp rated (resistive load).
Digital Input Functions
The digital inputs can be used for the following actions;
• A Digital contact on an input can be used to enable or disable one or any combination of
alarms
• Can be used in Maths expressions
• Can have current status indicated on DPMs, Bars and Charts
Failsafe Relay Positions
Table 12.2 :
QXe, QX and SX Relay Positions (no alarms active)
Normal
Relay Output
States
NO NC
Power On Open Closed
Power Off Open Closed
Failsafe
Relay Output
States
NO NC
Power On Closed Open
Power Off Open Closed
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