Teledyne 1220 - Multipoint flammable gas and vapor detection system - Manual (Page 27)

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Multi-Channel Combustible Monitor Installation 3
Teledyne Analytical Instruments
3.4.4 Configuring the Internal Jumper Connections
The Channel Module outputs may be configured by setting the internal
jumpers. In addition there are several factory preset jumpers configured as
shown in the following table. Changing the internal jumpers requires remov-
ing the channel module cover as in section 3.4.1.
The Channel Module is configured to provide an RS485 communica-
tion link with the Control Unit (not available at this time). This communica-
tion link is not compatible with Control Units having the Common Meter. In
order to use the Channel Module with a Control Unit that has a Common
Meter, remove jumpers JP1 and JP3 as indicated in the following table:
The Channel Module can provide one of three forms of output. The
output appears at terminal 16 and 17 of the terminal strip, and is selected by
jumper setting as in the following table:
RS485
Used with Model 1220
With common meter (normal)
Jp1
Jp3
On
On
Off
Off