Compliances
Power Requirements
115 VAC + or – 10%: 50/60 Hz
230 VAC + or – 10%: 50/60 Hz
12 to 60 VDC
For applicable models.
DC Power Requirements (MD1970A-DC)
DC Power Supply Voltage:
10 to 53 Volts DC
DC Current Requirements:
500 mA at 12 Volts
200 mA at 24 Volts
100 mA at 48 Volts
Isolation Voltage:
500 Volts DC (between inputs to outputs)
Fuse Rating:
1.5 Amp, Slow Blow
Interface Pin Assignments
DTE Connector - EIA RS-232-C
Pin
RS-232C Circuit
CCITT V.24 Circuit
Function
1 AA
101
Protective
Ground
2 BA
103
Transmitter
Data
3 BB
104
Receive
Data
4
CA
105
Request to Send
5
CB
106
Clear to Send
6
CC
107
Data Set Ready
7 AB
102
Signal
Ground
8
CF
109
Data Carrier Detect
9
+12 Volts Test Only
10
-12 Volts Test Only
25
Analog Loopback
Note:
All interfaces on the RS-232-C digital connector conform to the requirements of EIA-RS-232-C.
Telco Connector
Pin
Description
4, 5
2-wire mode: transmit/receive pair.
4-wire mode: transmit pair.
3, 6
Receive pair for 4-wire mode.
Polarity of transmit pair or receive pair is not significant. Remaining pins are not used.
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Страница 7: ...Installing the Modem Figure 2 5 Modem Jumper Locations Page 7...
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