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Java Terminal Hardware Interface Description
3.9 Power Supply
40
PLS62T-W_HID_v01 2018-06-20
Confidential / Prelimenary
Page 34 of 91
3.9 Power Supply
The Java Terminal power supply via Western jack has to be a single voltage source of
V
PLUS
=8V…30V capable of providing a peak current (pulsed 2x577ms at T=4.615ms) of about
1.2A at 8V during an active transmission
1
. The uplink burst causes strong ripple (drop) on the
power lines. The drop voltage should not exceed 1V. The absolute minimum voltage during
drops is given in Section 4.1.
The Java Terminal are protected from supply voltage reversal. An external fast acting fuse
>
0.4A with melting integral I
2
t (0.15 … 0.25)A
2
s is necessary to use the Java Terminal at a 12V
or 24V unlimited power supply system.
The power supply must be compliant with the EN60950 guidelines. A switching regulator reg-
ulates the input voltage for the internal supply.
When power fails for >1ms, Java Terminal reset or switch off. The watchdog can be configured
to restart the Java Terminal. When power fails for >15s the RTC will be reset.
Figure 9: 6-pole Western jack for power supply, ignition, reset, typical connection
1. As an alternative to the power supply via Western jack, Power over Ethernet (PoE) can be employed.
The PoE feature complies with IEEE 802.3 standards, and can be made available in Ethernet networks
via PoE enabled devices such as PoE routers or injectors.
Table 15: Female 6-pole Western plug for power supply, ignition, power down
Pin Signal name Use Parameters
1 PLUS Power supply 8V – 30V DC (PLS62T-W USB)
8V – 57V DC (PLS62T-W LAN)
2 PLUS Power supply 8V – 30V DC (PLS62T-W USB)
8V – 57V DC (PLS62T-W LAN)
3 RST_IN Signal for module reset U
IH
> 8V for t>10ms resets the terminal.
U
IL
<2V and low level for normal operation.
4 IGT_IN Ignition U
IH
>8V
Ignition >
8V for more than 200ms switches
the Java Terminal on. Ignition is activated
only by a rising edge. The rise time is
<20ms
5 GND Ground 0V
6 GND Ground 0V
Pin assignmment and typical connection:
1 PLUS
2 PLUS
3 RST_IN
4 IGT_IN
5 GND
6 GND
V
PLUS
DC
6 5 4 3 2 1
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