CHAPTER 5: Electrical Characteristics
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5. Electrical Characteristics
This chapter covers the power specifications of the LinkUp 5294 and the requirements of the
RS-232C interface for synchronous and asynchronous communications.
5.1 Power Specifications
The LinkUp 5294 power supply is rated at 50 watts and operates on 115 or 230 volts (plus or minus 15%)
at 50 or 60 Hz (plus or minus 2 Hz). Its power connector is the international standard CEE-22.
NOTE
Units with 115 volts are shipped with a 7-foot NEMA 5-15P three-prong plug.
The LinkUp 5294 is certified to operate in accordance with the following standards:
•
UL —
Underwriters Laboratory: Listed with EDP Equipment/Office (Standards 478), File No.
E87479.
•
CSA —
Canadian Standards Association: Certified.
•
IEC —
International Electrotechnical Commission: Designed to meet IEC 380.
•
BPO —
British Post Office: Meets the requirements of Technical Guide #26.
•
FCC —
Federal Communications Commission: Complies with the requirements of U.S. 47CFR Part
15 Subpart J, Class B, assuming shielded RS-232C cables are used.
5.2 Cable Pin Requirements
All of the ports on the LinkUp 5294 support the standard EIA RS-232C interface signals. In the next
three sections, the signals specific to synchronous and asynchronous communications are identified.
Synchronous Port
A minimum conductor synchronous cable that will work with Bell compatible sync modems and the
LinkUp 5294 in Modem Eliminator mode requires the following pins: 1 through 8, 15, 17, and 20. If the
LinkUp 5294 is to be dialed from the host, Pin 22 most also be supported.
1
Frame Ground
1
2
Transmit Data (TxD)
2
3
Receive Data (RxD)
3
4
Request To Send (RTS)
4
5
Clear To Send (CTS)
5
6
Data Set Ready (DSR)
6
7
Signal Ground
7
8
Data Carrier Detected (DCD)
8
15
Transmit Clock (TxC)
15
17
Receive Clock (RxC)
17
20
Data Terminal Ready (DTR)
20
22
Ring Indicator (RI)
22