28
Figure 3-10
Relay Specification
Model:
JRC-27F
Material of
the touch
Silver
Rating
（
resistance
load
）
Rated switch capacity
30VDC 2A, 125VAC 1A
Maximum switch power
125VA 160W
Maximum switch voltage
250VAC, 220VDC
Maximum switch currency 1A
Insulation
between touches with
same polarity
1000VAC 1minute 50/60Hz
between touches with
different polarity
1000VAC 1minute 50/60Hz
between touch and winding 1000VAC 1minute 50/60Hz
Surge
voltage
between touches with
same polarity
1500V (10
×
160us)
Length of
open time
3ms max
Length of
close time
3ms max
Longevity
Mechanical
50
×
106 times (3Hz)
Electrical
200
×
103 times (0.5Hz)
Temperature -40 ~+70
2.8
RS232
You can connect the DVR with POS or Keyboard through RS232.
With POS system, the DVR can communicate through RS232 and network. For the POS
system, the DVR can integrate the text content and even search the record through the
info.
The series DVR also support NKB operation. You can operate the DVR from the keyboard
controls instead of using the control pad on the front panel of the unit.
To connect a NKB keyboard to the DVR:
