|
Memory |
|
Ram |
128K |
|
Real Time Clock |
Accuracy
Sync-input |
Better
than 7 seconds in 10 days
over full temperature range
A voltage free contact closure
100-200ms on the half hour |
|
Data Ports |
Interrorgation
port
GRDO
OMDO
Comms-Out
Comms-In |
V24/RS232
V24/RS232
V24/RS232
20mA bi-directional current loop active
20mA bi-directional current loop passive |
|
Meter
Inputs |
Channels
Voltage source
Current at 15V
Max operation frequency
Frequency rejection |
32
contact closure
15VDC (protected at 20V)
4mA typical
7Hz
Will not respond to >20Hz |
|
Frequency Inputs |
Number
Type
Input Voltage |
2
Isolated 50Hz grid frequency
50-132VRMS |
|
Outputs |
Watchdog relay
Summation (optional)
Analogue |
Two
changeover contacts
(rated: 100VDC, 1A)
8 mercury wetted relays
(rated: 500VDC, 100mA)
16 bi-directional current source
(rated: -12.75mA to +12.75mA) |
|
Supply Input |
Nominal
Voltage range
Input current
Fuse rating |
48VDC
or 110VDC (AC options on request)
42 to 137VDC
150mA (48VDC)
60mA (110VDC)
500mA (mounted on PSU) |
|
Batteries |
Type
Hold up time (Memory/clock) |
AA
Alkaline
>10 days (28 days on request) |
|
Enviroment |
Temperature
Humidity
Electrical |
+5deg.
C to +55 deg.C
10% to 95% non-condensing
to NGTS 2.9,2.13
Meter Inputs class Y
Supply Inputs class Z
Watchdog alarm class Z
Relay outputs class Y
Comms in/out class Z
GRDO/OMDO class Y
Analogue outputs class Y
Frquency inputs class Z |
|
Mechanical |
Mounting
Panel height
Depth |
19
inch rack type
4 U (7 inches)
13 inches plus sockets |