APPENDIX 2 DIGITAL INTERFACE
AP-3
Transmission intervals
Load requirements as listener
Isolation: Provided
Input Impedance: Input Impedance: 110 ohms (130K ohms without jumper plug)
Max. Voltage: ±14 V to GNDiso
Threshold: ±0.2 V (A-B)
Output drive capability
Differential driver output
R=50 ohm 2 v min.
R=27 ohm 1.5 V min.
Driver short-circuit current
60 mA min. 150 mA max.
Data transmission
Data is transmitted in serial asynchronous form in accordance with the standard referenced in 2.1
of IEC 61162-1/2. The first bit is a start bit and is followed by data bits, least-significant-bit as il-
lustrated below.
The following parameters are used:
Baud rate: 38.4 Kbps /4800 bps
Data bits: 8 (D7 = 0), parity none
Stop bits: 1
Sentence
Interval
Sentence
Interval
ABK
With each event
ACA
When requested, or with each
event
ACS
Transmitted after ACA
ALC
30 seconds
ALF
When requested, or with each
event
ALR
30 seconds
ARC
With each event
EPV
When requested, or with each
event
HBT
50 seconds
LR1
With each event
LR2
With each event
LR3
With each event
LRF
With each event
LRI
With each event
NAK
With each event
PIWWIVD
When requested, or with each
event
PIWWSPR
When requested, or with each
event
PIWWSSD
When requested, or with each
event
PIWWVSD
When requested, or with each
event
SSD
When requested, or with each
event
TRL
When requested, or with each
event
TXT
When requested, or with each
event
VDM
With each event
VDO
1 second or with each event
VER
When requested, or with each
event, or powered on
VSD
When requested, or with each
event
D0 D1 D2 D3 D4 D5 D6 D7
Start
bit
Stop
bit
Data bits
IEC61162-1:Edition 4.0 2010-11
IEC61162-2:First Edition 1998-09
IEC61162-450:Edition 1.0 2011-06
Summary of Contents for FA-170
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