Sensor Electronics SEC 3500 HMI Hardware Manual page 20

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 P/N: 1460014
Rev / ECO: A / 000209
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
SEC 3100
BACK SIDE
*NOTE: COM1
AND COM2
REFER TO THE
ISO COMMON,
NOT DC
COMMON
Humidity
0-99% RH (non-condensing)
Part Number
3100-000-REPEAT
Page 20 of 26