JRC JMR-92 Series Field Service Manual page 67

The power system diagram is shown in Fig. 2.2.1.
PSU (Power Supply Unit: NBD-913) supplies power to the Scanner Unit and Display Unit which
consists of MNU(Monitor Unit), CCU (Central Control Unit), OPU(Operation Unit), and
JB(Junction Box). The lists of Input/Output features of the PSU are given in Table 2.2.2 and Table
2.2.3.
Input
AC Input
Voltage
Voltage ranges
Overvoltage Protection
Frequency
Input Current
Over current Protection
DC Input
Voltage
Voltage ranges
Overvoltage Protection
Input Current
Over current Protection
Control Signals
N_24V_ON
N_MTR_ON
N_MNU_ON
Table 2.2.2 The list of PSU input section
100 to 115Vac
220 to 240Vac
85 to 264VAC
295VAC±2V,
50Hz / 60Hz
Max 6.8A(100VAC) / 3.4A(220VAC)
equipped
24Vdc
21.6 to 31.2Vdc
42V
Max 16A
equipped
CCU power control signal.
Open Collector Input.
Logic Level L: 24Vdc (CCU) ON.
Scanner unit power control signal.
Open Collector Input.
Logic Level L: 100-220Vac, 48Vdc, 24Vdc (M+. M-), and
24Vdc (1A, 2A) ON.
Monitor unit power control signal.
Open Collector Input.
Logic Level L: 24Vdc (MNU) ON.
2-9
Detail
Chapter 2 System Configuration