TELEVAC MM200 - RS232 Hardware; RS485 Hardware

INSTRUMENT MANUAL
VACUUM GAUGE MODEL MM200
160Phone:(215) 947-2500 fax:(215) 947-7464 e-mail:sales@televac.com web site:www.televac.com
MM-200_im REV M
Page 103 of 160
TELEVAC
RS232 The MM200 uses a DE9S connector (female) for RS232
HARDWARE and the RS485 hardware interface. The pinouts are in
accordance with Fig. 6.1 and Table 6.1.
PIN FUNCTION
2 Tx - from MM200
3 Rx - to MM200
4 DTR - to MM200
5 GROUND
6 DSR - TO MM200
7 DO NOT USE
8 DO NOT USE
1 RS485 (Same as "B")
9 RS485 (Same as "A") *
5 1
o o o o o
o o o o
9 6
* For PCB # 3900G105 (See copper side)
- Not connected for "F" revision and lower.
RS485 The MM200 uses a 3 pin connector for the RS485
HARDWARE hardware interface. The pinouts are in accordance with Figure and table. One
possible way to interconnect is shown below using a 485TBLED converter.
PIN FUNCTION
B Lead "B"
A Lead "A" (Less + at IDLE mode)
G Ground