Hioki ST5540, Instruction Manual, Page: 270 / 326

10.7 User interface
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10.7 User interface
Display 320 x 240 dot matrix LCD (with backlight)
LCD contrast adjustment : Provided with front panel control
Operation panel 6 x 6 matrix touch panel
Key lock function provided (asserts KEYLOCK terminal on EXT I/O)
10.8 EXT I/O
External I/O (standard) • Connector : 36-pin, female
• Isolation (output: in 3.3 V power supply, internal GND (equivalent
to chassis grounding)
• Negative logic, open collector output
• Input:START
Measurements start when this signal is set to LO
STOP Terminated when set to LO
KEYLOCK Disable all except Start switch
LOAD0(to 4) Reads saved panel (30 panels)
(EXT.DCV) External power 5 to 24 V DC input
(EXT.COM)External COM input
• Output:TEST Outputs LO during measurements
(automatic measurement only)
MEAS When there are multiple measurement items,
an equivalent number of outputs are generated
PASS Outputs PASS judgment result for each
measurement item
FAIL Outputs FAIL judgment result for
each measurement item
LOW Outputs LOW judgment result for each measurement
item.Continues output if a single LOW state is
produced during automatic tests produced during
automatic tests
T-FAIL Generates output even if one FAIL judgment
result is produced during automatic tests
(INT.DCV) Internal 5 V DC output
(isolated from internal circuits)
(INT.GND) Internal GND output
(equivalent to chassis grounding)
10.9 Relay output for medical equipment
(only ST5540)
Relay output
S10 : Relay between functional earth terminal and measurement power supply system
ground
S12 : Relay between patient connection and measurement power supply circuit ground
S13 : Relay between metal accessible part not protectively earthed and earth