System Overview
22
7210 SAS-M CHASSIS INSTALLATION GUIDE
3HE 10089 AAAA TQZZA Edition 01 Issue: 07
RTN refers to the negative side of the floating external power supply. This power
supply must not be connected to chassis ground and should be 18 to 50 VDC at 100
ma. Please refer to section 9 for further information.
2.4.4 Power Modules
7210 SAS-M 24F 2XFP ETR variant provides three power module options: –48V,
+24V and universal AC. See Figure 5 for an illustration of the power modules.
For specifications on the power modules and external input power requirements, see
section 3.2.4 and section 7.
8 ALARM_IN1_EXT_+ External alarm input 1 (external relay dry contact
closure to pin 15)
9 CRIT_ALARM_NC Normally closed during critical alarm state
10 MJR_ALARM_CNTR Common contact for major alarm relay
11 MJR_ALARM_NO Normally open during major alarm state
12 ALARM_IN4_EXT_R
TN
External alarm input 4 (external relay dry contact
closure from pin 5)
13 ALARM_IN3_EXT_R
TN
External alarm input 3 (external relay dry contact
closure from pin 6)
14 ALARM_IN2_EXT_R
TN
External alarm input 2 (external relay dry contact
closure from pin 7)
15 ALARM_IN1_EXT_R
TN
External alarm input 1 (external relay dry contact
closure from pin 8)
Table 3 Alarm Interface Port Pin Assignments (Continued)
Pin Name Function
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