Using the Handler Interface
7-1
IM 755601-01E
7
Chapter 7 Using the Handler Interface
LOCAL key
GP-IB connector
7.1 Handler Interface Functions and Specifications
Handler Interface Specifications
The types of interface signals are as follows:
• Comparator result output signal (HI, IN, LO)
• Handshaking signal (EXT TRIG, INDEX, EOM)
• Key lock control signal (HOLD)
• Power supply (+12V, COM)
Specifications
Pin No. Signal
Active Cond.
I/O
Function/Operation
1
HI
L
Output L when the comparator result is HI
2
IN
L
Output L when the comparator result is IN
3
LO
L
Output L when the comparator result is LO
4
NO CONTACT L
Output L when a contact check error occurs or when
an abnormality is detected in the test current
7
+12 V
—
Output Power supply
8
EXT TRIG
Specified edge Input
External trigger signal*1
9
EOM
L
Output L when the measurement is complete and
the comparator result is output*2
10
HOLD
L
Input
Key lock*3
11
INDEX
L
Output H during trigger input, L when data collection
is complete*4
14
COM
—
—
Common
*1 The minimum pulse width is 100
µ
s.
*2 The pulse width can be set to 0.1, 5, 10, or 15 ms. The initial setting is 10 ms.
*3 When the signal is in the active state (L), the instrument switches to the measurement mode
regardless of the mode it is currently in (the trigger mode is set to EXTERNAL), and makes
measurements. In addition, all keys other than the R/% and STORE DATA keys are disabled
(key lock). When the signal changes from L to H, all keys are enabled. Thus, you can press
the SETUP/MEAS key to switch to the SETUP mode.
*4 When the contact check (after measurement) is enabled, this signal is set to L when the
contact check completes.
CAUTION
• The maximum common-mode voltage across the case and each input/output
terminal (pin) is
±
42 V peak. Applying a voltage that exceeds this level can
damage the instrument.
• Do not apply a voltage that exceeds the maximum input voltage (+12 V) to the
input terminal (pin).
Do not connect a load to the output terminal (pin) that would cause the
maximum load current (25 mA) to be exceeded. Do not apply a voltage that
exceeds the maximum load voltage (30 V) to the output terminal (pin).
Do not connect a load to the power terminal that would cause the maximum
load current (50 mA) to be exceeded.
In all of the previous cases, non-compliance with the specifications can damage
the instrument.
• Do not apply a negative voltage to the input and ouput terminals (pins) with
respect to the common signal (COM). Doing so can damage the instrument.
Note
To minimize the influence from electro-magnetic interference, use a shielded cable for making
connections. In addition, connect the cable’s shield to the connector case of the cable.
