Chapter 2 - Installation; General; Power/Supply; Requirements - Elpro Technologies 915U-2 User Manual

Page 16

Chapter 2 - Installation

2.1 General

All 915U-2 Series modules are housed in a plastic enclosure with DIN rail mounting,
providing options for up to 14 I/O points, and separate power & communications
connectors. The enclosure measures 170 x 150 x 33 mm including connectors. The
antenna protrudes from the top

2.2 Power/Supply

B A - +
100M
EXPANSION ETHERNET
External "Sealed Lead
Acid" battery if required

2.2.1 Requirements

The recommended power options available for the 915U-2 module are as follows.
1. 15 - 30 volt DC power source rated at 37Watts, connected to the "SUP+" &
"SUP-" terminals.
2. 12-15 volt DC power source rated at 37Watts, connected to the "BAT+" & "GND"
terminals
A primary power supply connected to the "SUP+" & "SUP-" terminals will automatically
charge a 13.8V Sealed Lead-Acid battery, if connected to the "BAT+" and "GND"
terminals at up to 1Amp at ambient room temperature (25°C). Battery charge current is
reduced to 0.5A at 60°C.
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LINK
USB
Figure 2 – Power Connectors
_
+
15-30V DC Supply
Figure 3 – Supply Connections
915U-2 Wireless I/O
BAT SUP
GND
+ -
RS232 SUPPLY
POWER SUPPLY
GND
BAT +
SUP -
SUP +
SUP
+
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