ADCMT 7451A User Manual

7451A/7461A/7461P Digital Multimeter Operation Manual
6.5 Comparator Output
6-11
6.5 Comparator Output
The comparator calculation result is output from the comparator output terminal (COMPARATOR) on the
rear panel as the TTL signal and the optical semiconductor relay contact signal.
Specifications
Connector D-Sub9 pin
a. Optical semiconductor relay contact
Allowable contact voltage (for break) DC30 V
Allowable contact current DC120 mA
Withstand voltage between contact and GND 30 V
Contact operating time 1 ms or less
Contact output LO: 4 pin and 8 pin
HI: 3 pin and 7 pin
PASS: 2 pin and 6 pin
b. TTL output
Output level TTL
Maximum allowable applied voltage 12 V peak
Overload characteristics Short-circuit (continuous)
Figure 6-3 Signal Output Pin
Pin name Pin number
Signal GND 5
RELAY LO 4
RELAY HI 3
RELAY PASS 2
TTL PASS 1
3
2
5
4
1
8
7
9
6
Pin number Pin name
9 TTL FAIL
8 RELAY LO
7 RELAY HI
6 RELAY PASS

ADCMT 7451A Specifications

General

Brand	ADCMT
Model	7451A
Category	Multimeter
Language	English