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Contact:
®
NovaTech Process Solutions, LLC
11500 Cronridge Dr., Suite 110
Owings Mills, MD 21117
T: 410.753.8300
Toll Free: 800.253.3842
www.novatechweb.com
. 16 input channels
. 24 V dc field voltage sources
. Individually isolated channels
. User definable input threshold
. Pulse counting option
Module Specications
Inputs
Number of channels ........................................................................16
OFF voltage...........................................................................< 3.4 V dc
ON voltage .............................................................................> 11 V dc
Wetting current ........................................2.8 mA (nom.) @ 24 V dc
Minimum pulse width detected ...............................................5 ms
Max input freq in pulse counting mode (no-debounce)100 Hz
Maximum voltage
Input ......................................................................................30 V dc
Reverse input ................................................................. – 25 V dc
Isolation (Any Channel to railbus) .....................................250 V ac
Isolation (channel to channel) ......................................150 V peak
Congurable Parameters
Selectable input filter ...........................fast, slow or user defined
(User defined permits 0 to 512 ms values in 2ms steps)
Pulse counting ..........................................................enable /disable
Response Time
I/O response time ............................................................5 ms (max.)
(Field event to new data available on Railbus)
Safety
FM non-incendive field wiring parameters (each channel)
......................V
max
= 30 V; I
max
= 100 mA; C
i
= 0 µF; L
i
= 0 mH
NT-8122-DI-DC
Image Description
16-channel Discrete Input
24 V dc, isolated, sinking
Power Supplies
Railbus (12V) current......................................................90 mA (typ.)
.........................................................................................135 mA (max.)
Bussed Field Power .......................................................not required
Mechanical
Module Key Code .............................................................................E2
Module width ............................................................................42 mm
Weight............................................................................................210 g
Field Terminals
Field Wiring Recommended
Field Terminal
Compatible
Field Terminal
General Purpose NT-8617-FT-NI †
16 channel DI
-
Class 1, Div 2
or Zone 2 hazard-
ous area
NT-8617-FT-NI †
16 channel DI
-
† External fusing of the Field Power supply is recommended
in order to protect the field wiring.
NovaTech 8000 Series I/O Family
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Copyright © 2007 NovaTech, LLC. All rights reserved. All trademarks
are properties of their respective owners. NovaTech is a registered
trademark of NovaTech, LLC. The information in this literature is
subject to change without notice and is not to be construed as a
warranty. DS_8122_0607