Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL VF-5C RFL Electronics Inc.
October 8, 2012 12 (973)
334-3100
Select any unused time slot for Channel 2 using DIP switches SW3-1 to SW3-5.
SW3-1 through SW3-5 select the transmit timeslot assignment for Channel 2, in
accordance with Table 3.
Select Channel 1 bus direction using DIP switch SW2-6.
Place SW2-6 in the DOWN position to transmit in the A direction and receive from the B
direction. Place SW2-6 in the UP position to transmit in the B direction and receive from
the A direction.
Select Channel 2 bus direction using DIP switch SW3-6.
Place SW3-6 in the DOWN position to transmit in the A direction and receive from the B
direction. Place SW3-6 in the UP position to transmit in the B direction and receive from
the A direction.
10. Select Channel 1 loopback mode by using DIP switches SW2-7, SW2-8, and SW1-9
There are four loopback modes: None, Local Loopback, Remote Loopback and 2713 Hz
Loopback. As its name implies, None indicates that no loopbacks are selected. Local
Loopback, when selected, is used to test TX and RX
analog circuitry at the near end as
shown in Figure 10a. Remote Loopback, when selected, is used to test TX and RX analog
circuitry at the far end as shown in Figure 10b.
The 2713Hz Loopback mode, as shown in Figure 10c, is normally used if remote control of
the VF-5C via NMS is not available. To use this mode you must first enable the “2713 Hz
feature” and then select manual deactivation or automatic deactivation.
To use 2713 Hz loopback with manual deactivation do the following:
1. Enable the “2713 Hz feature” by setting SW2-7 and SW2-8 to ON, and SW1-9
to OFF.
2. Activate remote loopback at the remote end VF-5C by injecting a 2713 Hz
signal into the Input Equipment jack (from the master end towards the remote
end) for at least two seconds using a “TIM” set or equivalent.
3. The VF-5C at the remote end will stay in remote loopback mode until it is manually
deactivated.
If the 2713 Hz signal is still connected, remote loopback is deactivated, by removing the
2713 Hz signal and then momentarily reconnecting it for at least one second.
If the 2713 Hz signal is not connected, remote loopback is deactivated by momentarily
connecting it for at least one second.
To use 2713 Hz loopback with automatic deactivation do the following:
1. Enable the “2713 Hz feature” by setting SW2-7 and SW2-8 to ON, and SW1-9
to ON.
2. Activate the remote loopback at the remote end VF-5C by injecting a 2713 Hz
signal into the Input Equipment jack (from the master end towards the remote
end) for at least two seconds using a “TIM” set or equivalent.
3. The VF-5C at the remote end will stay in remote loopback mode as long as the 2713 Hz
signal is present at the master end. If the 2713 Hz signal is removed, the loopback at the
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