20
TMN/TMP SERIES
OPERATING MANUAL
For the 24V TMP module the resistor should be between 1 and 4.8 ohms;
for the 28V TMP module it should be between 1.3 and 6.5 ohms; and for
the 48V TMP module it should be between 3.8 and 19 ohms.
20.4
Connect a color-coded, twisted pair (no. 22 or 24 AWG) from the remote
sense pins to the load. The +Sense lead (J1 Pin 11) must go to the
positive side of the load and the - Sense lead (J1 Pin 23) must go to the
negative side of the load. Connect a wire from the Remote Enable
input (J1 Pin 1) to Signal Common (Pin 22). This connection must be
made for the module to operate.
20.5
Insert one of the modules into slot 1 of the rack (leftmost slot). Plug the
AC power line into a 230VAC source and measure the voltage across the
load at the remote sense points with a digital voltmeter. The voltage
should be at the rated output voltage of the module, i.e., 24, 28 or 48V,
±1%.
20.6
Checking the Front Panel LEDs. The AC Good and DC Good LEDs
should both be green.
20.7
Checking the Remote Enable Input. Next, disconnect the Remote
Enable wire from J1 Pin 1 to Pin 22. The module output should turn off,
giving zero volts across the load. The DC Good LED should go off.
20.8
Checking the AC Good and DC Good Outputs. Connect the -lead of
an external 5V power supply to Signal Common (J1 Pin 22). Connect one
end of a 10K resistor to the +lead of the 5V supply and the other end to
the AC Good output (J1 Pin 14). Connect one end of another 10K resistor
to the +lead of the 5V supply and the other end to the DC Good output (J1
Pin 15). See Figure 10. Reconnect the Remote Enable wire. Measure the
output voltage at both J1 Pins 14 and 15 with respect to Signal Common
(Pin 22) with a digital voltmeter. Both voltages should be less than
0.5VDC, indicating a TTL LO.
20.9
Checking the Remote Adjust Input. Connect a variable external power
supply as shown in Figure 11. With the output voltage set to zero, check
the output voltage of the module with a digital voltmeter. For a 48V unit it
should be approximately 45V and for a 24V unit it should be approxi-
mately 22.5V. Next, adjust the supply output to +5V and check the output
voltage of the module. For a 48V unit it should be approximately 58V and
for a 24V it should be approximately 29V. Unplug the external 5V supply
and unplug the AC inputs to the rack.
