5.0 SYSTEM DIAGNOSTICS
UL S2203
CyberCat 50 Operation Manual
5-27
FM 3029134
P/N: 06-368-2
Rev 4, 08/2013
5.10 VOLTAGES
The main control board has two primary test points that are used when making voltage measurements on the
board:
TP1 = COM
This test point should be used when making DC voltage measurements on the control board.
Connect the voltmeter ground lead to this terminal; then touch the positive lead to the point under
test.
TP2 = 24V
This test point is the + side for the main controller 24VDC power bus (connect the voltmeter
ground to TP1). Check this point if AC power is applied, but the system does not seem to
operate properly.
10-2620 REV
02-11544 REV A
F1
F2
F3
F6
F5
F4
T
A
C
R
E
B
Y
C
5 0 P T
v x . x x
R
O
C
E
K
I
F
P OR A T I O N
A
0
0
:
0
0
:
2
1
0 1 / 0 3 / 2 0 1 1
:
U
S
0
0
0
:
L
A
0 0 0
T R : 0 0 0
TP1
TP2
Exhibit 5-36: Control Board Test Points
LOOP VOLTAGE
Nominally 24 VDC, with a data communication pulse that drops down to a level between 0-5
VDC. During normal operation, a meter should measure anywhere from 0-24 VDC. It should not
measure a constant 0 VDC.
GROUND FAULT, TP1 to Chassis
With a normal panel and no ground fault, this voltage is 2.17 VDC nominal. If a ground fault is
present, this voltage will sway in either direction. Use the Diagnostic screen to troubleshoot the
ground fault. Ground fault detection impedances are 60K ohm between power ground and
chassis ground or 1M ohm between main power and chassis ground.
