22
TMN/TMP SERIES
OPERATING MANUAL
20.10 Checking the Other TMN/TMP Modules. Each module should be tested
in the above manner to verify its operation. Go back to Section 20.5 and
proceed through the tests one by one until all modules have been verified.
20.11 Checking the Complete Rack. Confirm that the output voltages of the
individual modules are all accurately set to 24, 28 or 48V. The voltages
between modules should be within ±1% of each other for best perfor-
mance of the current sharing circuitry. Insert all modules into the rack.
Connect a power load - - high-power resistor or electronic load in resistive
mode -- in accordance with the table, to the output of the rack. Connect
the + and - Sense leads to + and - sides of the load, respectively, as in
Section 20.4.
Table 20-1 TMN/TMP Rack Loads for Test
Note that on the back of the rack each module has its own AC power
connection. For this test each module should be connected to a separate
15A, 230VAC circuit. Plug the rack into the 230VAC power sources.
Check the load voltage with a digital voltmeter. It should be very close to
24, 28 or 48VDC (±1%), depending on the model tested. The AC Good
and DC Good LEDs should both be green on each module.
20.12 While the rack is operating, pull Module No. 1 out while monitoring the
output voltage with a digital voltmeter. The voltage should remain the
same. Insert the module back into the rack. Repeat this for each of the
other modules. This test determines that hot-swapping is functioning
properly in the N+1 redundant mode.
20.13 With all the modules inserted into the rack, check the Enable input for the
entire rack. Disconnect the Remote Enable wire from J1 Pin 1 to Pin 22.
The rack output should turn off and the output voltage should go to zero.
31.5-42A
54-72A
63-84A
37.5-50A
64.5-86A
75-100A
NO. OF
MODULES
3
3
3
3
3
3
48
28
24
48
28
24
OUTPUT
VOLTAGE
LOAD
CURRENT
LOAD
RESISTOR
1.14 - 1.52
Ω
0.39 - 0.52
Ω
0.29 - 0.38
Ω
0.96 - 1.28
Ω
0.33 - 0.43
Ω
0.24 - 0.32
Ω
MODEL
TMN
TMN
TMN
TMP
TMP
TMP
