Seiko Instruments DPU-30 - Manual (Page 24)

4-2
into V+ and V-pins. (To avoid voltage drops.)
When supplying the power through the DC socket, be sure to leave V+
and V- unconnected. Never supply the power into V+ and V- terminals,
and never short V+ and V- terminals.
∗ Use terminal numbers 22, 23 or 26 as the signal ground for RS-232C.
∗ Short terminal numbers 25 and 26 to feed the paper.
∗ SEL LED lights up at the time on-line by connecting it to terminal numbers 27 and 28.
∗ Paper near end sensor:
This printer does not have the paper near end function. However, this function can be
built in by mounting a device such as a photo sensor.
NEAR_A: Pull up it with +4.75 to +5.1 V through the current limit resistance.
NEAR_OUT: The logic of NEAR_C is inversed and output.
Example:
The following diagram describes how a device such as a photo sensor is mounted to
use.
2. DC socket terminal layout
Connector (Socket) : HEC0470-01-630 (Hosiden)
Polarity:
Table 4-2 DC Socket Terminal Assignment
No. Signal name Direction Function
1 DC+8.7V
− Power
input
2 GND
− Ground
∗ Supply of the power through the interface connector terminals is available, instead of the DC
socket terminal.
When supplying the power through the interface and power connector
terminals, do not connect the DC socket.
(Center plus)
Photo sensor, etc