Instruction manual

16
INM4840-5 Nov 2007
16
5 MODULES
5.1 MTL4841 and 4842 – installation
Place the MTL4841 over its connector, in the position marked on
the backplane. Ensure that the module is not tilted, which could
damage the connector pins, then press it carefully to the backplane.
All safe-area circuit and power connections are made through this
connector.
Tighten the two (captive) mounting screws.
Repeat this procedure for the MTL4842 module(s) but please
note:
When fitting the MTL4842 module on the HMU16 and
HMU16AO backplanes, DO NOT place the MTL4842
beside the MTL4841 - see Figure 4.8
5.2 Isolator modules (if used)
If the backplane accommodates isolators, refer to instruction manual
INM4000 for information on wiring hazardous-area connectors for
MTL4000 Series isolators.
Position each isolator module in its appropriate location on the
backplane as shown in Figure 5.1. Ensure that the module is not
tilted, which could damage the connector pins, then press it carefully
to the backplane. All safe-area circuit and power connections are
made through this connector.
Tighten the two (captive) mounting screws (A) to hold the isolator in
postion.
Insert the hazardous area connector into the top of the module as shown.
5.3 Modules – setting and configuration
5.3.1 MTL4841 – setting and configuration
The baud rate for the RS485 interface is selected using switches A &
B top of the MTL4841 communications module. Set the switches to
one of the options given here.
Switches
A B Baud rate
ON OFF 1200
OFF ON 9600
ON ON 19200
OFF OFF 38400
MTL4841 address switch
Up to 31 MTL4841 communications modules can be connected to a
single maintenance workstation. Each MTL4841 must be configured
with a unique address by using the five switches located on the top
of the module. See Table 5.1 for settings.
Table 5.2 - MTL4842 address switch setting options
Switch Number
1234 Address
ON OFF OFF OFF 1
OFF ON OFF OFF 2
ON ON OFF OFF 3
OFF OFF ON OFF 4
ON OFF ON OFF 5
OFF ON ON OFF 6
ON ON ON OFF 7
OFF OFF OFF ON 8
ON OFF OFF ON 9
OFF ON OFF ON 10
ON ON OFF ON 11
OFF OFF ON ON 12
ON OFF ON ON 13
OFF ON ON ON 14
ON ON ON ON 15
OFF OFF OFF OFF 16
A
A
Figure 5.1 - Mounting an isolator module on the backplane
Table 5.1 - MTL4841 address switch setting options
Switch Number
1 2 3 4 5 Address
ON OFF OFF OFF OFF 1
OFF ON OFF OFF OFF 2
ON ON OFF OFF OFF 3
OFF OFF ON OFF OFF 4
ON OFF ON OFF OFF 5
OFF ON ON OFF OFF 6
ON ON ON OFF OFF 7
OFF OFF OFF ON OFF 8
ON OFF OFF ON OFF 9
OFF ON OFF ON OFF 10
ON ON OFF ON OFF 11
OFF OFF ON ON OFF 12
ON OFF ON ON OFF 13
OFF ON ON ON OFF 14
ON ON ON ON OFF 15
OFF OFF OFF OFF ON 16
ON OFF OFF OFF ON 17
OFF ON OFF OFF ON 18
ON ON OFF OFF ON 19
OFF OFF ON OFF ON 20
ON OFF ON OFF ON 12
OFF ON ON OFF ON 22
ON ON ON OFF ON 23
OFF OFF OFF ON ON 24
ON OFF OFF ON ON 25
OFF ON OFF ON ON 26
ON ON OFF ON ON 27
OFF OFF ON ON ON 28
ON OFF ON ON ON 29
OFF ON ON ON ON 30
ON ON ON ON ON 31