Manual

DT220 Users Manual version 1.a Hardware & Wiring
37
Hardware and Wiring
This section describes installation and wiring information for the interface ports. There
are three bi-directional serial ports, one parallel printer port, 7 TTL inputs and 8 TTL
outputs. In addition, there is an optional load cell input port.
TB1 - TTL Output 1- 6, gnd
Pin # Signal Name
1 TTL output 1
2 TTL output 2
3 TTL output 3
4 TTL output 4
5 TTL output 5
6 TTL output 6
7 Ground (GND)
TB2 - TTL Output 8 & 9, gnd, +5V
Pin # Signal Name
1 TTL output 7
2 TTL output 8
3 Ground (GND)
4 Ground (GND)
5 Ground (GND)
6 +5V
7 +5V
TB3 - TTL Input 1 – 7 ( TTL Input 7 = Cal Function Lock)
Pin # Signal Name
1 TTL input 1
2 TTL input 2
3 TTL input 3
4 TTL input 4
5 TTL input 5
6 TTL input 6
7 TTL input 7 (Function Lock)
Jump to ground to unlock