User's Manual

Table Of Contents
SEL-3022 Transceiver Instruction Manual Date Code 20050615
Introduction & Specifications
Connections, Reset Button, and LED Indications
1.8
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Figure 1.4 Typical Alarm Output Installation
Serial Port Pin-Out Connection
The SEL-3022 has a fully compliant DCE serial port. SEL offers many cable
configurations for use between the SEL-3022 and other devices.
The serial port pin-out descriptions for the DCE port are as follows.
Table 1.1 DCE (Female DB9)
Pin Description
1 Data Carrier Detect (Output)
2 Transmitted Data (Output)
3 Received Data (Input)
4 Data Terminal Ready (Input)
5Ground
6 Data Set Ready (Output)
7 Request to Send (Input)
8 Clear to Send (Output)
9 Ring Indicator (Output)
SEL-3022
Alarm Output Contact
Do not apply 125 Vdc
directly to the SEL-3022
power supply connections
Typical SEL contact
inputs draw 4 mA of
nominal wetting source voltage
SEL-2030
Contact Input
Wetting Voltage
125 Vdc
0.5 A, 250 V
Fast Blow Fuse
Optional Load
Resistor
+
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