Multitech MultiModem DSVD MT5600DSVD Instruction Manual download pdf (Page 26)

16 Assembling the SmartServer Hardware

Digital Inputs

The SmartServer has two optically isolated, polarity-sensitive digital inputs that you can use to monitor

switch and sensor devices. The digital input connections are implemented on screw terminals 13–16:

Input 2 is connected to terminals 13-14; Input 1 is connected to terminals 15–16. These connections

are polarity-sensitive: terminals 14 and 16 are marked positive (+), and terminals 13 and 15 are marked

negative (-). You cannot reverse the polarity of the digital inputs because it will cause improper

operation of the monitoring circuits.

Each of the digital inputs is controlled by a Digital Input application on the SmartServer. See Chapter 9

of the i.LON SmartServer 2.0 User’s Guide for configuring the SmartServer to use the digital inputs to

which it is connected.

The following figure illustrates the location of the digital input screw terminals on the SmartServer.

The following table lists the enclosure markings for the digital input screw terminals on the

SmartServer and their connection type.

Screw Terminal Enclosure Marking Digital Input Connection

13 Input 2- - Signal from input 2

14 Input 2+ + Signal from input 2

15 Input 1- - Signal from input 1

16 Input 1+ + Signal from input 1

You can connect the digital inputs on the SmartServer to a set of dry contacts, or to an active device

output. The +12V < 20mA screw terminals (19–20), which are described in the next section, can be

used as a voltage source for the digital inputs. The following figure demonstrates this configuration.

Note that in this figure the connection between screw terminals 16 and 20 does not include screw

terminal 19, as it is connected to the active device.

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 34 35

No comments

Multitech MultiModem DSVD MT5600DSVD Instruction Manual Page 26