Sensor Electronics SEC Millenium Series Instruction And Operation Manual page 21

Operation
The SEC 3100 ISO RS-485 Repeater Module is used in conjunction with the SEC 3100 transmitters and
the SEC 3500 HMI Operator Interface or other MODBUS RS-485 data highway systems. The SEC
3100 ISO RS-485 Repeater Module is used to extend the distance of the RS-485 network and increase
the number of devices on the RS-485 network. The SEC 3100 ISO RS-485 Repeater Module provides
1500 volt isolation bidirectional data flow and transient suppression on the RS-485 data lines. An SEC
3100 ISO RS-485 Repeater Module should be installed for every 1000 feet of data highway cable or 32
network devices. The SEC 3100 ISO RS-485 Repeater Module is powered by 24 VDC and wired in line
with the SEC RS-485 network devices. A typical wiring diagram is shown below:
SEC 3100
BACK SIDE
Specifications
Operating Voltage
18-32 VDC
Operating Current
50mA @ 24VDC
SEC 3100 ISO
RS-485 Repeater Module
A1 (DATA A) DC Common
B1 (DATA B) + 24 VDC
ISO COM ISO COM
+ 24 VDC B1 (DATA B)
DC Common A1 (DATA A)
Temperature Rating
-40° to + 70°C
Input / Output (digital)
MODBUS RTU
Sensor Electronics Corporation
5500 Lincoln Drive
Minneapolis, Minnesota 55436 USA
(T) 952.938.9486 (F) 952.938.9617
www.sensorelectronics.com
SEC 3100
BACK SIDE
Humidity
0-99% RH (non-condensing)
Part Number
3100-000-REPEAT