Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
The RFL TMX module accepts voltage as an input and the RFL TMR module generates current
as an output. If you want to use voltage as an output instead of current, conversion resistor(s)
are required at the TMR. Place conversion resistor R1 across terminals TB2-1 and TB3-4 (for
analog channel 1), conversion resistor R2 across terminals TB2-2 and TB3-3 (for analog
channel 2), conversion resistor R3 across terminals TB2-3 and TB3-2 (for analog channel 3), or
conversion resistor R4 across terminals TB2-4 and TB3-1 (for analog channel 4), on the RFL
MA-700 module adapter (See Figure 2). The conversion resistors should have a precision of
0.01% to guarantee the system accuracy of +/-0.05%. Since the system accuracy applies to a
full-scale current output, the conversion resistor should be chosen so that the current through it
is as high as practical and within one of the ranges shown in Table 9.
Table 9. Output gain versus output current range
Output Gain Output Current Range
1 -50 mA to +50 mA
1/2 -25 mA to +25 mA
1/4 -12.5 mA to +12.5 mA
1/8 -6.25 mA to +6.25 mA
For example, if an output voltage range of 0 to 10 volts is required, then a conversion resistor
of 200 ohms will result in an equivalent current output of 0-50 mA at the D/A converter. The
resistor value is calculated as follows: 10V/50mA = 200 ohms, which is a readily available
value for a precision resistor.
6. After its jumpers are set and conversion resistors are installed if applicable, insert the MA-700
Module Adapter into the slot at the rear of the multiplexer chassis directly behind the module
slot where the RFL TMR module will be installed. Secure the module adapter with the screws
provided.
7. Connect the module adapter to the user equipment using the pin assignments listed in Figure 1
as applicable.
8. Refer to Figure 4 and Table 10 for the location and function of DIP switches on the TMR
module.
9. Set the SCB address using DIP switches SW1-1 through SW1-6 for the desired remote
address.
For remote access, each module in the IMUX 2000 must have a distinct module
address. Valid addresses are the numbers “1” to “36”. It is recommended to set the
address to the number of the slot the module is occupying. Table 6 shows the
switch settings for the module address. (Consult your multiplexer manual for
details on using the remote access and configuration features of the system.)
10. Select local mode by seting SW2-7 to the DOWN position.
NOTE
Steps 11-20 may be performed with the module in Remote mode with applicable
parameters set using NMS/SCB instead of DIP-switches. When Remote mode is
used, set SW2-7 to the UP position.
RFL TMX/TMR RFL Electronics Inc.
January 25, 2012 16 (973) 334-3100
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