Multitech MultiModem DSVD MT5600DSVD Instruction Manual Page 24

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14 Assembling the SmartServer Hardware
6 Output 1 Relay output 1
7 Output 2 Relay output 2
8 Output 2 Relay output 2
You can connect the dry contact relay outputs on the SmartServer to a voltage source and a load.
When an ON value is asserted, the circuit will be closed and the voltage source will drive the load.
The following figure demonstrates this configuration.
Pulse Meter Inputs
The SmartServer includes two impulse meter inputs that comply with the DIN 43 864 impulse standard
(open terminal voltage <12VDC, maximum current 27mA). The pulse meter input connections are
implemented on screw terminals 9–12: Meter 2 is connected to terminals 9-10; Meter 1 is connected to
terminals 11-12. These connections are polarity-sensitive: terminals 9 and 11 are marked negative (-),
and terminals 10 and 12 are marked positive (+). You cannot reverse the polarity of the pulse meter
inputs because it will cause improper operation of the measurement circuits.
Each of the pulse meter inputs is controlled by a Pulse Counter application on the SmartServer. A
pulse input meter registers a pulse when the circuit between its positive and negative connections is
closed (the voltage is 0) for 30ms or longer. The circuit must be open for a minimum of 30ms between
pulses. See Chapter 9 of the i.LON SmartServer 2.0 User’s Guide for configuring the SmartServer to
use the pulse meter inputs to which it is connected.
The following figure illustrates the location of the pulse meter input screw terminals on the
SmartServer.
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