Slidewire
- Series C does not support Slidewire.
Range spool damage and wire shorting
Jumpers JP1 through JP16 are also used to overcome a damaged range spool (250 ohm dropping
resistor).
A range spool can be damaged by being directly connected across a 24V for an extended period,
such as, taking an even numbered terminal from TB1 to 24V. It can be removed from the circuit by
clipping the corresponding jumper. You can continue to use the channel by providing a discrete
(axial lead) 250 ohm resistor.
Example: using channel 5 and overcoming a damaged spool
1. One lead of the resistor connects to the even numbered screw on TB1 associated with that
channel.
(i.e. screw N = 2 times channel M, so screw 10 is for channel 5).
2. The other lead of the resistor connects to Series C ground, which can probably be found on
any of the TB2 screw positions (assuming the corresponding jumper JP17-20 is still
installed).
If TB2 is already filled with wiring, 'doubling up' is permitted as long as the total wire
dimension is less than the 14 AWG equivalent dimension.
3. Transmitter power is supplied in a non-incendive fashion through the odd-numbered
terminals on TB1. This is done through a 145 ohm resistor inline with a Positive
Temperature Coefficient (PTC) device that acts like a fuse (but never needs replacement).
Thus, these field terminals can be permanently shorted to ground without damage. This is
an improvement over Process Manager due to the inclusion of the PTC device.
