Detcon 1600A-N1P - Manual (Page 13)

1600A-N1P
3.3 Installing the I/O Modules
Normally, maximum of two (2) I/O modules may be factory installed on the main NEMA 1 rack and ready for
wiring to external devices (sensors and alarm enunciators). Additional modules should be mounted in a
separate enclosure. If they are not installed, follow the procedure below.
I/O modules are mounted to industry-standard 37.5 x 7.5 mm din-rail. Install the first I/O module on the din
rail and slide it all the way to the right side stop. When installing additional I/O modules, make sure there is
about 0.5 inch clearance spacing on either side of the module and snap onto the din rail (the 0.5” spacing is to
allow for connector clearance). Once the I/O module is snapped onto the din-rail, slide it to the right and
assure that it firmly plugs into the next module. Repeat as necessary for the balance of the modules. The
1600-A Controller NEMA 1 rack has room for a maximum of two (2) I/O modules. Additional modules
should be mounted in a separate enclosure.
RELAY
COMM
M
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D
4-20mA
INPUT
COMM
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4-20mA
INPUT
COMM
M
S
D
L
S
D
4-20mA
INPUT
COMM
M
S
D
L
S
D
4-20mA
INPUT
COMM
M
S
D
L
S
D
RELAY
COMM
M
S
D
L
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RELAY
COMM
M
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RELAY
COMM
M
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SBA
-
+
RS-485 Cable
Use Belden P/N 9841
RS-485 and Power cable
Use Belden P/N 1502P
I/O Connector
Detcon P/N 306-189320-300
S B
A
-
+
Figure 8 I/O Module Installation
For addressable I/O modules or Modbus™ sensors that are being located remotely from the Model 1600A-
N1P controller use Belden 1502P cable for serial and power connections. For serial only connections use
Belden 9841 cable. Interconnect them using the din-rail terminal blocks shown in
. Figure 7
3.4 Connecting to the I/O Modules
4-20mA Gas Sensors
Connect 4-20mA type gas sensors to the Model DA4 4-20mA input modules. There are four 4-20mA inputs
in each Model DA4 module.
1600A-N1P Instruction Manual Rev. 0.1 Page 9 of 40