Installing the data module – GE A8950CC User Manual
Page 8
Setting Mode
8
RS-485 2-wire 2 V
9
RS-485 4-wire standard
A
RS-485 4-wire 1 V
B
RS-485 4-wire 2 V
C
Reserved
D
Reserved
E
Reserved
F
Test Mode
Overview
The Phoenix A8910MPD data module is capable of inserting/extracting
4 channels of multiprotocol serial data (MPD) per module. With a maximum of four
cards per node, the system capacity is 16 channels. Each channel is capable of
transmitting and receiving serial data throughout the Phoenix system. The card is not
limited to any single data type so that various formats can be mixed on a single card.
As with other GE Security MPD products, data translation capabilities are included.
Tools and materials required
The data modules are held in place with simple thumbscrews with screwdriver slots.
The only tool recommended is a small flat blade screwdriver.
Installation instructions:
1. Configure data module:
Prior to installation, you must specify the appropriate data format using the rotary
switches on the module. For each channel on the data module, rotate the dial switch to
the desired format. If you want to select the data format from the front panel, leave the
switch in position 0.
Setting
Mode
0
Software-selectable (factory preset)
1
RS-232 (3-wire)
2
RS-232 + handshake
3
TTL
4
RS-422 2-wire
5
Manchester/biphase
6
RS-485 2-wire standard/Sensornet
7
RS-485 2-wire 1V
NOTE: The DATA SELECT switches are shipped in the Software-Selectable setting.
As with all GE Security MPD products, data translation can easily
be accomplished using the table information below.
Translation
Comment
Input
TTL RS-232, 3-wire
TTL RS-422
RS-232, 3-wire TTL
3
3
4
4
2
7 - A
1
1
Signal level conversion.
Signal level conversion.
Single ended to differential conversion.
Single ended to differential conversion.
Differential to single ended conversion.
Differential to single ended conversion.
RS232 Handshaking bit is used to indicate Tri-state.
Tri-state detection circuitry activates handshaking bit.
Output
1
3
1
7 - A
2
4
4
3
RS-422 TTL-wire
RS-422 RS-232, 3-wire
RS-485 RS-232, 5-wire
RS-232, 5-wire RS-485
RS-232, 3-wire
RS-422
Installing the Data Module
6