925U-2 wireless mesh networking I/O and gatewayinstallation guide
Install Guide
925U-2
Effective Sept 2022
ELPRO Technologies
29 Lathe St
Virginia, QLD 4014
Australia
www.elprotech.com
Telephone:
61 7 3352 8600
ELPRO Technologies Inc
2028 East Ben White Blvd,
#240-5656 Austin, TX 78741-6931
USA
Telephone:
USA: +1 855 443 5776
ELPRO is a registered trademark.
All other trademarks are property of their respective owners.
© 2022 ELPRO
All Rights Reserved
NOTE
All connections must be SELV <50 Vac and <60 Vdc.
The following illustrations show the ports on the 925U 2.
PWR
RF
232
485
LED Indicator
Lights
I/O Connectors
RJ-45 Ethernet Port
(connects to hub or switch)
USB Port RS-232 Port
ETHERNET
USB
RS232
SUPPLY
+
-
GND BAT SUP SUP
+
B
A
-
+
Power supply wiring
The ground (GND) and “SUP –“
terminals are connected internally to
the ground terminal.
Connect the screw terminal on
the end plate to ground for surge
protection.
Expanson I/O power and RS-485 serial connection
An on-board RS-485 terminating
resistor provides line
attenuation for long runs.
Place terminating resisters at
each end of the RS-485 cable.
Configuration switches
Use the DIP switches in the side
access panel to select analog input
voltage and current, external boot,
and default configuration settings.
DIP
DESCRIPTION
1
AI3 current/voltage
2
AI3 current/voltage
3
AI4 current/voltage
4
AI4 current/voltage
5
Unused
6
Enables default configuration
Input and output connections
The digital input/output channels can be wired as inputs or outputs.
Digital input
Digital output
Transistor
Switch
Device (NPN)
Voltage-free Contact
TTL CMOS
Output
D1
D3 D4 D5 D6 D7 D8 GND+24V
D2
DC Load
200mA max
+
–
D1
D3 D4 D5 D6 D7 D8
GND +24V
D2
30V DC max
Differential current inputs (Al1, Al2)
Single-ended current input (Al3, Al4)
mA
Loop-Powered
Sensor
Exernally
Powered
Sensor
Power Supply
D7 D8
GND +24V
AI1
+
AI1
_
AI2
+
AI2
_ AI3 AI4
AO1
+
AO2
+
GND +24V
mA
Loop-Powered
Sensor
Power Supply
Externally
Powered
Sensor
DIP Switch Setting
for Current IP
GND +24V
AI1
+
AI1
_
AI2
+
AI2
_ AI3 AI4
AO1
+
AO2
+
GND +24V
1 2 3 4
5 6
ON
Analog output
Single-ended voltage input
AI
PLC
COM
AI1
+
AI1
_
AI2
+
AI2
_ AI3 AI4
AO1
+
AO2
+
GND +24V
0–25V
Sensor
0–5 Vdc
Sensor
+24V
AI1
+
AI1
_
AI2
+
AI2
_ AI3 AI4
AO1
+
AO2
+
GND +24V
V
V
DIP Switch Setting
for Voltage IP
ON
1 2 3 4
5 6
ETHERNET
USB
RS232
B
A
-
+
115S-xx
115S-xx
RS-485
B
A
B
A
B
A
-
+
-
+
USB
RS232
SUPPLY
+
-
GND BAT SUP SUP
+
15-30 Vdc
Supply
3A Fuse
Optional
10.8–15 Vdc
Lead Acid
Battery
–
+
USB Host
Configuration
Switches
Side
Access
Panel
